<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-08-20T18:46:53.8933602+00:00 -->
<!-- Version            : 5.0.1.648 -->
<!-- Package ID         : 69d10a80a54e4982a5815a34e3b8c43d -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:dei="http://xbrl.sec.gov/dei/2020-01-31" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2020-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2018-01-31" xmlns:srt-types="http://fasb.org/srt-types/2020-01-31" xmlns:sic="http://xbrl.sec.gov/sic/2020-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:srt="http://fasb.org/srt/2020-01-31" xmlns:us-gaap="http://fasb.org/us-gaap/2020-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2017-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2020-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:currency="http://xbrl.sec.gov/currency/2020-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2020-01-31" xmlns:syna="http://www.synaptics.com/20210626" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.synaptics.com/20210626" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd" namespace="http://xbrl.sec.gov/country/2020-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd" namespace="http://xbrl.sec.gov/currency/2020-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd" namespace="http://xbrl.sec.gov/dei/2020-01-31" />
  <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
  <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/exch/2020/exch-2020-01-31.xsd" namespace="http://xbrl.sec.gov/exch/2020-01-31" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/negated" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/net" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" namespace="http://xbrl.sec.gov/naics/2017-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/sic/2020/sic-2020-01-31.xsd" namespace="http://xbrl.sec.gov/sic/2020-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd" namespace="http://fasb.org/srt/2020-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-roles-2020-01-31.xsd" namespace="http://fasb.org/srt-roles/2020-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd" namespace="http://fasb.org/srt-types/2020-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" namespace="http://xbrl.sec.gov/stpr/2018-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd" namespace="http://fasb.org/us-gaap/2020-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-roles-2020-01-31.xsd" namespace="http://fasb.org/us-roles/2020-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd" namespace="http://fasb.org/us-types/2020-01-31" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType id="TemplateLink" roleURI="http://www.synaptics.com/20210626/role/TemplateLink" xmlns:link="http://www.xbrl.org/2003/linkbase">
        <link:definition>00000 - Document - Template Link</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="syna-20210626_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:title="Calculation Links, all" xlink:type="simple" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="syna-20210626_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:title="Definition Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="syna-20210626_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="syna-20210626_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/StatementConsolidatedBalanceSheets" id="Role_StatementConsolidatedBalanceSheets">
        <link:definition>100010 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" id="Role_StatementConsolidatedBalanceSheetsParenthetical">
        <link:definition>100020 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/StatementConsolidatedStatementsOfOperations" id="Role_StatementConsolidatedStatementsOfOperations">
        <link:definition>100030 - Statement - Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss" id="Role_StatementConsolidatedStatementsOfComprehensiveIncomeLoss">
        <link:definition>100040 - Statement - Consolidated Statements of Comprehensive Income/(Loss)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/StatementConsolidatedStatementsOfStockholdersEquity" id="Role_StatementConsolidatedStatementsOfStockholdersEquity">
        <link:definition>100050 - Statement - Consolidated Statements of Stockholders Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" id="Role_StatementConsolidatedStatementsOfCashFlows">
        <link:definition>100060 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies">
        <link:definition>100070 - Disclosure - Organization and Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureNetIncomeLossPerShare" id="Role_DisclosureNetIncomeLossPerShare">
        <link:definition>100080 - Disclosure - Net Income/(Loss) Per Share</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosurePropertyAndEquipment" id="Role_DisclosurePropertyAndEquipment">
        <link:definition>100090 - Disclosure - Property and Equipment</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestment" id="Role_DisclosureAcquisitionsDivestitureAndInvestment">
        <link:definition>100100 - Disclosure - Acquisitions, Divestiture and Investment</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquiredIntangibles" id="Role_DisclosureAcquiredIntangibles">
        <link:definition>100110 - Disclosure - Acquired Intangibles</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureDebt" id="Role_DisclosureDebt">
        <link:definition>100120 - Disclosure - Debt</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingencies" id="Role_DisclosureLeasesCommitmentsAndContingencies">
        <link:definition>100130 - Disclosure - Leases, Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureStockholdersEquity" id="Role_DisclosureStockholdersEquity">
        <link:definition>100140 - Disclosure - Stockholders&apos; Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensation" id="Role_DisclosureShareBasedCompensation">
        <link:definition>100150 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureEmployeeBenefitPlans" id="Role_DisclosureEmployeeBenefitPlans">
        <link:definition>100160 - Disclosure - Employee Benefit Plans</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxes" id="Role_DisclosureIncomeTaxes">
        <link:definition>100170 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformation" id="Role_DisclosureSegmentCustomersAndGeographicInformation">
        <link:definition>100180 - Disclosure - Segment, Customers, and Geographic Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureRestructuringActivities" id="Role_DisclosureRestructuringActivities">
        <link:definition>100190 - Disclosure - Restructuring Activities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>100200 - Disclosure - Organization and Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesTables" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>100210 - Disclosure - Organization and Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureNetIncomeLossPerShareTables" id="Role_DisclosureNetIncomeLossPerShareTables">
        <link:definition>100220 - Disclosure - Net Income/(Loss) Per Share (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosurePropertyAndEquipmentTables" id="Role_DisclosurePropertyAndEquipmentTables">
        <link:definition>100230 - Disclosure - Property and Equipment (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentTables" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentTables">
        <link:definition>100240 - Disclosure - Acquisitions, Divestiture and Investment (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquiredIntangiblesTables" id="Role_DisclosureAcquiredIntangiblesTables">
        <link:definition>100250 - Disclosure - Acquired Intangibles (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureDebtTables" id="Role_DisclosureDebtTables">
        <link:definition>100260 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingenciesTables" id="Role_DisclosureLeasesCommitmentsAndContingenciesTables">
        <link:definition>100270 - Disclosure - Leases, Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureStockholdersEquityTables" id="Role_DisclosureStockholdersEquityTables">
        <link:definition>100280 - Disclosure - Stockholders&apos; Equity (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationTables" id="Role_DisclosureShareBasedCompensationTables">
        <link:definition>100290 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesTables" id="Role_DisclosureIncomeTaxesTables">
        <link:definition>100300 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationTables" id="Role_DisclosureSegmentCustomersAndGeographicInformationTables">
        <link:definition>100310 - Disclosure - Segment, Customers, and Geographic Information (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureRestructuringActivitiesTables" id="Role_DisclosureRestructuringActivitiesTables">
        <link:definition>100320 - Disclosure - Restructuring Activities (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail">
        <link:definition>100330 - Disclosure - Organization and Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesAccountsReceivableBalancePercentageOfDifferentCustomersDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesAccountsReceivableBalancePercentageOfDifferentCustomersDetail">
        <link:definition>100340 - Disclosure - Organization and Summary of Significant Accounting Policies - Accounts Receivable Balance Percentage of Different Customers (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesAccountsReceivableBalancePercentageOfDifferentCustomersParentheticalDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesAccountsReceivableBalancePercentageOfDifferentCustomersParentheticalDetail">
        <link:definition>100350 - Disclosure - Organization and Summary of Significant Accounting Policies - Accounts Receivable Balance Percentage of Different Customers (Parenthetical) (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesInventoriesDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesInventoriesDetail">
        <link:definition>100360 - Disclosure - Organization and Summary of Significant Accounting Policies - Inventories (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesScheduleOfChangesInGoodwillDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesScheduleOfChangesInGoodwillDetail">
        <link:definition>100370 - Disclosure - Organization and Summary of Significant Accounting Policies - Schedule of Changes in Goodwill (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesOtherAccruedLiabilitiesDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesOtherAccruedLiabilitiesDetail">
        <link:definition>100380 - Disclosure - Organization and Summary of Significant Accounting Policies - Other Accrued Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesOtherLongTermAccruedLiabilitiesDetail" id="Role_DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesOtherLongTermAccruedLiabilitiesDetail">
        <link:definition>100390 - Disclosure - Organization and Summary of Significant Accounting Policies - Other Long Term Accrued Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureNetIncomeLossPerShareComputationOfBasicAndDilutedNetIncomePerShareDetail" id="Role_DisclosureNetIncomeLossPerShareComputationOfBasicAndDilutedNetIncomePerShareDetail">
        <link:definition>100400 - Disclosure - Net Income/(Loss) Per Share - Computation of Basic and Diluted Net Income Per Share (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureNetIncomeLossPerShareShareBasedAwardsNotIncludedInCalculationOfDilutedNetIncomePerShareDetail" id="Role_DisclosureNetIncomeLossPerShareShareBasedAwardsNotIncludedInCalculationOfDilutedNetIncomePerShareDetail">
        <link:definition>100410 - Disclosure - Net Income/(Loss) Per Share - Share-Based Awards, not Included in Calculation of Diluted Net Income Per Share (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosurePropertyAndEquipmentPropertyAndEquipmentDetail" id="Role_DisclosurePropertyAndEquipmentPropertyAndEquipmentDetail">
        <link:definition>100420 - Disclosure - Property and Equipment - Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail" id="Role_DisclosurePropertyAndEquipmentAdditionalInformationDetail">
        <link:definition>100430 - Disclosure - Property and Equipment - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentAdditionalInformationDetail" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentAdditionalInformationDetail">
        <link:definition>100440 - Disclosure - Acquisitions, Divestiture and Investment - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetail" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetail">
        <link:definition>100450 - Disclosure - Acquisitions, Divestiture and Investment - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetail2" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetail2">
        <link:definition>100460 - Disclosure - Acquisitions, Divestiture and Investment - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail)2</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfPreliminaryEstimateOfIntangibleAssetsDetail" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfPreliminaryEstimateOfIntangibleAssetsDetail">
        <link:definition>100470 - Disclosure - Acquisitions, Divestiture and Investment - Summary of Preliminary Estimate of Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfUnauditedProFormaFinancialInformationPresentsCombinedResultsOfOperationsDetail" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfUnauditedProFormaFinancialInformationPresentsCombinedResultsOfOperationsDetail">
        <link:definition>100480 - Disclosure - Acquisitions, Divestiture and Investment - Summary of Unaudited Pro Forma Financial Information Presents Combined Results of Operations (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfAdjustedPurchasePriceDetail" id="Role_DisclosureAcquisitionsDivestitureAndInvestmentSummaryOfAdjustedPurchasePriceDetail">
        <link:definition>100490 - Disclosure - Acquisitions, Divestiture and Investment - Summary of Adjusted Purchase Price (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquiredIntangiblesSummaryOfLifeGrossCarryingValueOfAcquiredIntangibleAssetsAndRelatedAccumulatedAmortizationDetail" id="Role_DisclosureAcquiredIntangiblesSummaryOfLifeGrossCarryingValueOfAcquiredIntangibleAssetsAndRelatedAccumulatedAmortizationDetail">
        <link:definition>100500 - Disclosure - Acquired Intangibles - Summary of Life, Gross Carrying Value of Acquired Intangible Assets, and Related Accumulated Amortization (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquiredIntangiblesAdditionalInformationDetail" id="Role_DisclosureAcquiredIntangiblesAdditionalInformationDetail">
        <link:definition>100510 - Disclosure - Acquired Intangibles - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureAcquiredIntangiblesScheduleOfExpectedAnnualAggregateAmortizationExpenseDetail" id="Role_DisclosureAcquiredIntangiblesScheduleOfExpectedAnnualAggregateAmortizationExpenseDetail">
        <link:definition>100520 - Disclosure - Acquired Intangibles - Schedule of Expected Annual Aggregate Amortization Expense (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureDebtAdditionalInformationDetail" id="Role_DisclosureDebtAdditionalInformationDetail">
        <link:definition>100530 - Disclosure - Debt - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureDebtScheduleOfRedemptionPricesAndUnpaidInterestDetail" id="Role_DisclosureDebtScheduleOfRedemptionPricesAndUnpaidInterestDetail">
        <link:definition>100540 - Disclosure - Debt - Schedule Of Redemption Prices And Unpaid Interest (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureDebtScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesDetail" id="Role_DisclosureDebtScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesDetail">
        <link:definition>100550 - Disclosure - Debt - Schedule of Contractual Interest Expense and Amortization of Discount on Notes (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingenciesAdditionalInformationDetail" id="Role_DisclosureLeasesCommitmentsAndContingenciesAdditionalInformationDetail">
        <link:definition>100560 - Disclosure - Leases, Commitments and Contingencies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingenciesScheduleOfComponentsOfLeasesDetail" id="Role_DisclosureLeasesCommitmentsAndContingenciesScheduleOfComponentsOfLeasesDetail">
        <link:definition>100570 - Disclosure - Leases, Commitments and Contingencies - Schedule of Components of Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingenciesScheduleOfSupplementalCashFlowInformationRelatedToLeasesDetail" id="Role_DisclosureLeasesCommitmentsAndContingenciesScheduleOfSupplementalCashFlowInformationRelatedToLeasesDetail">
        <link:definition>100580 - Disclosure - Leases, Commitments and Contingencies - Schedule of Supplemental Cash Flow Information Related to Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsForOperatingLeasesDetail" id="Role_DisclosureLeasesCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsForOperatingLeasesDetail">
        <link:definition>100590 - Disclosure - Leases, Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureLeasesCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsForOperatingLeasesDetail2" id="Role_DisclosureLeasesCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsForOperatingLeasesDetail2">
        <link:definition>100600 - Disclosure - Leases, Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Detail)2</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail" id="Role_DisclosureStockholdersEquityAdditionalInformationDetail">
        <link:definition>100610 - Disclosure - Stockholders&apos; Equity - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureStockholdersEquitySharesReservedForFutureIssuanceDetail" id="Role_DisclosureStockholdersEquitySharesReservedForFutureIssuanceDetail">
        <link:definition>100620 - Disclosure - Stockholders&apos; Equity - Shares Reserved for Future Issuance (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationNewShareBasedCompensationPlansAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationNewShareBasedCompensationPlansAdditionalInformationDetail">
        <link:definition>100630 - Disclosure - Share-Based Compensation - New Share-Based Compensation Plans - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationShareBasedCompensationAwardsAvailableForGrantOrIssuanceDetail" id="Role_DisclosureShareBasedCompensationShareBasedCompensationAwardsAvailableForGrantOrIssuanceDetail">
        <link:definition>100640 - Disclosure - Share-Based Compensation - Share-Based Compensation Awards Available for Grant or Issuance (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationShareBasedCompensationCashBasedAwardsAndRelatedTaxBenefitRecognizedInCondensedConsolidatedStatementsOfOperationsDetail" id="Role_DisclosureShareBasedCompensationShareBasedCompensationCashBasedAwardsAndRelatedTaxBenefitRecognizedInCondensedConsolidatedStatementsOfOperationsDetail">
        <link:definition>100650 - Disclosure - Share-Based Compensation - Share-Based Compensation, Cash-Based Awards and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationStockOptionsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationStockOptionsAdditionalInformationDetail">
        <link:definition>100660 - Disclosure - Share-Based Compensation - Stock Options - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationScheduleOfStockOptionActivityDetail" id="Role_DisclosureShareBasedCompensationScheduleOfStockOptionActivityDetail">
        <link:definition>100670 - Disclosure - Share Based Compensation - Schedule of Stock Option Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationCashReceivedAndAggregateIntrinsicValueOfStockOptionsExercisedDetail" id="Role_DisclosureShareBasedCompensationCashReceivedAndAggregateIntrinsicValueOfStockOptionsExercisedDetail">
        <link:definition>100680 - Disclosure - Share-Based Compensation - Cash Received and Aggregate Intrinsic Value of Stock Options Exercised (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationRestrictedStockUnitsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationRestrictedStockUnitsAdditionalInformationDetail">
        <link:definition>100690 - Disclosure - Share-Based Compensation - Restricted Stock Units - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationScheduleOfStockUnitsActivityDetail" id="Role_DisclosureShareBasedCompensationScheduleOfStockUnitsActivityDetail">
        <link:definition>100700 - Disclosure - Share-Based Compensation - Schedule of Stock Units Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationMarketStockUnitsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationMarketStockUnitsAdditionalInformationDetail">
        <link:definition>100710 - Disclosure - Share-Based Compensation - Market Stock Units - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationFairValueOfEachAwardGrantedUnderStockOptionPlansDetail" id="Role_DisclosureShareBasedCompensationFairValueOfEachAwardGrantedUnderStockOptionPlansDetail">
        <link:definition>100720 - Disclosure - Share-Based Compensation - Fair Value of Each Award Granted Under Stock Option Plans (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationPerformanceStockUnitsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationPerformanceStockUnitsAdditionalInformationDetail">
        <link:definition>100730 - Disclosure - Share-Based Compensation - Performance Stock Units - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationPhantomStockUnitsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationPhantomStockUnitsAdditionalInformationDetail">
        <link:definition>100740 - Disclosure - Share-Based Compensation - Phantom Stock Units - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationEmployeeStockPurchasePlanAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationEmployeeStockPurchasePlanAdditionalInformationDetail">
        <link:definition>100750 - Disclosure - Share-Based Compensation - Employee Stock Purchase Plan - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationSharesPurchasedWeightedAveragePurchasePriceCashReceivedAndAggregateIntrinsicValueForESPPDetail" id="Role_DisclosureShareBasedCompensationSharesPurchasedWeightedAveragePurchasePriceCashReceivedAndAggregateIntrinsicValueForESPPDetail">
        <link:definition>100760 - Disclosure - Share-Based Compensation - Shares Purchased, Weighted Average Purchase Price, Cash Received, and Aggregate Intrinsic Value for ESPP (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureShareBasedCompensationFairValueOfEachAwardGrantedUnderESPPDetail" id="Role_DisclosureShareBasedCompensationFairValueOfEachAwardGrantedUnderESPPDetail">
        <link:definition>100770 - Disclosure - Share-Based Compensation - Fair Value of Each Award Granted Under ESPP (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetail" id="Role_DisclosureEmployeeBenefitPlansAdditionalInformationDetail">
        <link:definition>100780 - Disclosure - Employee Benefit Plans - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesTabularDisclosureOfIncomeLossBeforeIncomeTaxBetweenDomesticAndForeignJurisdictionsDetail" id="Role_DisclosureIncomeTaxesTabularDisclosureOfIncomeLossBeforeIncomeTaxBetweenDomesticAndForeignJurisdictionsDetail">
        <link:definition>100790 - Disclosure - Income Taxes - Tabular Disclosure of Income (Loss) Before Income Tax Between Domestic and Foreign Jurisdictions (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesProvisionForIncomeTaxesDetail" id="Role_DisclosureIncomeTaxesProvisionForIncomeTaxesDetail">
        <link:definition>100800 - Disclosure - Income Taxes - Provision for Income Taxes (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesProvisionForIncomeTaxesDiffersFromFederalStatutoryRateDetail" id="Role_DisclosureIncomeTaxesProvisionForIncomeTaxesDiffersFromFederalStatutoryRateDetail">
        <link:definition>100810 - Disclosure - Income Taxes - Provision for Income Taxes Differs from Federal Statutory Rate (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" id="Role_DisclosureIncomeTaxesAdditionalInformationDetail">
        <link:definition>100820 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesSignificantComponentsOfDeferredTaxAssetsLiabilitiesDetail" id="Role_DisclosureIncomeTaxesSignificantComponentsOfDeferredTaxAssetsLiabilitiesDetail">
        <link:definition>100830 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets (Liabilities) (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureIncomeTaxesReconciliationOfGrossUnrecognizedTaxBenefitsDetail" id="Role_DisclosureIncomeTaxesReconciliationOfGrossUnrecognizedTaxBenefitsDetail">
        <link:definition>100840 - Disclosure - Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationAdditionalInformationDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationAdditionalInformationDetail">
        <link:definition>100850 - Disclosure - Segment, Customers, and Geographic Information - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationNetRevenueWithinGeographicAreasBasedOnCustomersLocationsDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationNetRevenueWithinGeographicAreasBasedOnCustomersLocationsDetail">
        <link:definition>100860 - Disclosure - Segment, Customers, and Geographic Information - Net Revenue within Geographic Areas Based on Customers&apos; Locations (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationNetRevenueFromExternalCustomersDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationNetRevenueFromExternalCustomersDetail">
        <link:definition>100870 - Disclosure - Segment, Customers, and Geographic Information - Net Revenue from External Customers (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationLongLivedAssetsWithinGeographicAreasDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationLongLivedAssetsWithinGeographicAreasDetail">
        <link:definition>100880 - Disclosure - Segment, Customers, and Geographic Information - Long-Lived Assets within Geographic Areas (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationMajorCustomersRevenueAsPercentageOfTotalNetRevenueDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationMajorCustomersRevenueAsPercentageOfTotalNetRevenueDetail">
        <link:definition>100890 - Disclosure - Segment, Customers, and Geographic Information - Major Customers&apos; Revenue as a Percentage of Total Net Revenue (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationMajorCustomersRevenueAsPercentageOfTotalNetRevenueParentheticalDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationMajorCustomersRevenueAsPercentageOfTotalNetRevenueParentheticalDetail">
        <link:definition>100900 - Disclosure - Segment, Customers, and Geographic Information - Major Customers&apos; Revenue as a Percentage of Total Net Revenue (Parenthetical) (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.synaptics.com/20210626/taxonomy/role/DisclosureRestructuringActivitiesRestructuringLiabilityActivitiesDetail" id="Role_DisclosureRestructuringActivitiesRestructuringLiabilityActivitiesDetail">
        <link:definition>100910 - Disclosure - Restructuring Activities - Restructuring Liability Activities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="syna_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermInvestments" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseLeaseAsset" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseLeaseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_FiniteLivedIntangibleAssetsAmortizationExpenseToBeDetermined" name="FiniteLivedIntangibleAssetsAmortizationExpenseToBeDetermined" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_EffectiveIncomeTaxRateReconciliationShareBasedCompensationShortfallAmount" name="EffectiveIncomeTaxRateReconciliationShareBasedCompensationShortfallAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_IncomeTaxReconciliationNonDeductibleCompensation" name="IncomeTaxReconciliationNonDeductibleCompensation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_ConvertibleNotesPayableNet" name="ConvertibleNotesPayableNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_AmortizationOfIntangibleAssetsIncludedInOperatingExpense" name="AmortizationOfIntangibleAssetsIncludedInOperatingExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_PayrollTaxesForDeferredStockUnits" name="PayrollTaxesForDeferredStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_IssuanceOfTreasuryStockForRedemptionOfConvertibleNotes" name="IssuanceOfTreasuryStockForRedemptionOfConvertibleNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_AcquiredIntangiblesAmortization" name="AcquiredIntangiblesAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_AmortizationOfCostOfDevelopmentServices" name="AmortizationOfCostOfDevelopmentServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_IncreaseDecreaseInAcquisitionRelatedLiabilities" name="IncreaseDecreaseInAcquisitionRelatedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_PaymentToAcquireInProcessResearchAndDevelopment" name="PaymentToAcquireInProcessResearchAndDevelopment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_PaymentForCostMethodInvestment" name="PaymentForCostMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_PaymentForPayrollTaxesForDeferredStockAndMarketStockUnits" name="PaymentForPayrollTaxesForDeferredStockAndMarketStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_LeasesCommitmentsAndContingenciesDisclosureTextBlock" name="LeasesCommitmentsAndContingenciesDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_LeasesCommitmentsAndContingenciesAbstract" name="LeasesCommitmentsAndContingenciesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CashEquivalentsAndInvestmentsPolicyTextBlock" name="CashEquivalentsAndInvestmentsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_OtherConcentrationsPolicyTextBlock" name="OtherConcentrationsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_AllowanceForDoubtfulAccountsPolicyTextBlock" name="AllowanceForDoubtfulAccountsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_OtherAssetsPolicyTextBlock" name="OtherAssetsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_OtherAccruedLiabilitiesAndOtherLongTermLiabilitiesPolicyTextBlock" name="OtherAccruedLiabilitiesAndOtherLongTermLiabilitiesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_AccountsReceivableBalancePercentageOfDifferentCustomersTableTextBlock" name="AccountsReceivableBalancePercentageOfDifferentCustomersTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DisplayLinkCorporationMember" name="DisplayLinkCorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_BroadcomMember" name="BroadcomMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ScheduleOfRedemptionPricesAndUnpaidInterestTableTextBlock" name="ScheduleOfRedemptionPricesAndUnpaidInterestTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesTableTextBlock" name="ScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_SharesReservedForFutureIssuanceTableTextBlock" name="SharesReservedForFutureIssuanceTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationAwardsAvailableForGrantOrIssuanceTableTextBlock" name="ShareBasedCompensationAwardsAvailableForGrantOrIssuanceTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DeferredStockUnitsMember" name="DeferredStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_MarketStockUnitsMember" name="MarketStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_IncentiveCompensationPlansMember" name="IncentiveCompensationPlansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_PerformanceStockUnitsMember" name="PerformanceStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" name="OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" name="OrganizationConsolidationAndPresentationOfFinancialStatementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FourPointZeroPercentSeniorNotesDueTwoThousandTwentyNineMember" name="FourPointZeroPercentSeniorNotesDueTwoThousandTwentyNineMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ZeroPointFiveZeroPercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" name="ZeroPointFiveZeroPercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_EtaComputeMember" name="EtaComputeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_OXiTechnologyLtdMember" name="OXiTechnologyLtdMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ThinTouchDevelopedTechnologyMember" name="ThinTouchDevelopedTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CustomerAMember" name="CustomerAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CustomerBMember" name="CustomerBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CustomerCMember" name="CustomerCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_RevenuePerformanceObligationPaymentTerms" name="RevenuePerformanceObligationPaymentTerms" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_AccountReceivableBadDebtCharge" name="AccountReceivableBadDebtCharge" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_EquityMethodInvestmentOwnershipPercentageReduced" name="EquityMethodInvestmentOwnershipPercentageReduced" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_ForeignCurrencyTransactionRealizedAndUnrealizedGainLossNetOfTax" name="ForeignCurrencyTransactionRealizedAndUnrealizedGainLossNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_GoodwillAllocatedToSaleOfProductLine" name="GoodwillAllocatedToSaleOfProductLine" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_CustomerObligation" name="CustomerObligation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_AccruedLiabilitiesForInventoryPurchase" name="AccruedLiabilitiesForInventoryPurchase" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_PropertyPlantAndEquipmentUsefulLifeAndValuesAbstract" name="PropertyPlantAndEquipmentUsefulLifeAndValuesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FurnitureFixturesAndLeaseholdImprovementsMember" name="FurnitureFixturesAndLeaseholdImprovementsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CapitalizedSoftwareMember" name="CapitalizedSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_PurchasePriceHeldInEscrow" name="PurchasePriceHeldInEscrow" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_ProFormaAdjustmentsToNetIncomeLoss" name="ProFormaAdjustmentsToNetIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_TransitionAgreementsDuration" name="TransitionAgreementsDuration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_BusinessCombinationCostOfServices" name="BusinessCombinationCostOfServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_BusinessCombinationNonCurrentOtherAssetsAfterAmortization" name="BusinessCombinationNonCurrentOtherAssetsAfterAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_BusinessAcquisitionMember" name="BusinessAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_BroadcomWirelessConnectivityMember" name="BroadcomWirelessConnectivityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_DerivativeAndRoadmapProductAgreementMember" name="DerivativeAndRoadmapProductAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_AssetPurchaseAgreementMember" name="AssetPurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermLeaseLiabilities" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermLeaseLiabilities" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_CustomerContractsAndRelatedRelationshipsMember" name="CustomerContractsAndRelatedRelationshipsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_LicensedTechnologyMember" name="LicensedTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_BusinessComibnationConsiderationTransferredAdjustmentsNet" name="BusinessComibnationConsiderationTransferredAdjustmentsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_CashPaymentsToEmployeesFromAcquisitions" name="CashPaymentsToEmployeesFromAcquisitions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_DiscountRatesAppliedToEstimatedCashFlowsForOrderBacklog" name="DiscountRatesAppliedToEstimatedCashFlowsForOrderBacklog" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DiscountRatesAppliedToEstimatedCashFlowsForAllIntangibleAssetsAcquired" name="DiscountRatesAppliedToEstimatedCashFlowsForAllIntangibleAssetsAcquired" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_AudioAndVideoTechnologyMember" name="AudioAndVideoTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_WirelessAndConnectivityTechnologyMember" name="WirelessAndConnectivityTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_VideoInterfaceTechnologyMember" name="VideoInterfaceTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_DisplayDriverTechnologyMember" name="DisplayDriverTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_BacklogMember" name="BacklogMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_LicensedTechnologyAndOtherMember" name="LicensedTechnologyAndOtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FullyAmortizedIntangibleAssetRetired" name="FullyAmortizedIntangibleAssetRetired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_FingerPrintDevelopedTechnologyMember" name="FingerPrintDevelopedTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FourPointZeroPercentConvertibleSeniorNotesDueTwoThousandTwentyNineMember" name="FourPointZeroPercentConvertibleSeniorNotesDueTwoThousandTwentyNineMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_PurchaseAgreementMember" name="PurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_WellsFargoSecuritiesLLCMember" name="WellsFargoSecuritiesLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ForFourFiscalQuartersEndingAfterDateOfMaterialAcquisitionMember" name="ForFourFiscalQuartersEndingAfterDateOfMaterialAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_AmendedAndRestatedCreditAgreementMember" name="AmendedAndRestatedCreditAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_AmendmentAndRestatementAgreementMember" name="AmendmentAndRestatementAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ThereafterMember" name="ThereafterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_SeniorDebtRepaymentDateDescription" name="SeniorDebtRepaymentDateDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_RedemptionOfPrincipalAmoutPercentage" name="RedemptionOfPrincipalAmoutPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DebtInstrumentRedemptionPricePercentageIncludingAccruedAndUnpaidInterest" name="DebtInstrumentRedemptionPricePercentageIncludingAccruedAndUnpaidInterest" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_SeniorNotesTwoThousandTwentyFourMember" name="SeniorNotesTwoThousandTwentyFourMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_SeniorNotesTwoThousandTwentyFiveMember" name="SeniorNotesTwoThousandTwentyFiveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_SeniorNotesTwoThousandTwentySixAndThereafterMember" name="SeniorNotesTwoThousandTwentySixAndThereafterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_DebtInstrumentRedemptionPercentageOfNetProceedsInCash" name="DebtInstrumentRedemptionPercentageOfNetProceedsInCash" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ProceedsFromIssuanceOfConvertibleDebt" name="ProceedsFromIssuanceOfConvertibleDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_ConvertibleDebtPrincipalAmountInMultiples" name="ConvertibleDebtPrincipalAmountInMultiples" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_DebtTradingPricePrincipalAmount" name="DebtTradingPricePrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_ConvertibleNotesPayableConversionRequest" name="ConvertibleNotesPayableConversionRequest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_SeniorNotesRedemptionInCash" name="SeniorNotesRedemptionInCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_ConversionOfNotesIntoCommonStock" name="ConversionOfNotesIntoCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_LossOnCoversionOfNotes" name="LossOnCoversionOfNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_PercentageOfPrincipalAmountOfNotesEqualToRepurchasePrice" name="PercentageOfPrincipalAmountOfNotesEqualToRepurchasePrice" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DebtInstrumentConvertibleNumberOfSharesPerThousandOfPrincipalAmountOfNotes" name="DebtInstrumentConvertibleNumberOfSharesPerThousandOfPrincipalAmountOfNotes" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DebtInstrumentConvertibleNumberOfSharesPerThousandOfPrincipalAmountOfNotesCurrent" name="DebtInstrumentConvertibleNumberOfSharesPerThousandOfPrincipalAmountOfNotesCurrent" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_LossOnIssuanceOfCommonStockFromTreasuryStock" name="LossOnIssuanceOfCommonStockFromTreasuryStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_NonconvertibleDebtBorrowingRate" name="NonconvertibleDebtBorrowingRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_ConvertibleDebtIssuanceCostsProRataToEquityComponents" name="ConvertibleDebtIssuanceCostsProRataToEquityComponents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_ConvertibleDebtIssuanceCostsProRataToDebtComponents" name="ConvertibleDebtIssuanceCostsProRataToDebtComponents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_DebtInstrumentAmortizationPeriod" name="DebtInstrumentAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_PriorLeverageRatioPermitted" name="PriorLeverageRatioPermitted" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_CurrentMaximumLeverageRatio" name="CurrentMaximumLeverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_MaximumPermittedLeverageRatio" name="MaximumPermittedLeverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_PermittedLeverageRatioPriorToAmendment" name="PermittedLeverageRatioPriorToAmendment" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_LineOfCreditFacilityAllowableRequestsForAdditionalBorrowing" name="LineOfCreditFacilityAllowableRequestsForAdditionalBorrowing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_LineOfCreditFacilityRepaymentDateDescription" name="LineOfCreditFacilityRepaymentDateDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_PercentageOfVotingCapitalStockOfCertainForeignSubsidiariesCollateralized" name="PercentageOfVotingCapitalStockOfCertainForeignSubsidiariesCollateralized" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_PercentageOfNonVotingCapitalStock" name="PercentageOfNonVotingCapitalStock" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_MaximumAccountsReceivableFinancings" name="MaximumAccountsReceivableFinancings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_MinimumInterestCoverageRatio" name="MinimumInterestCoverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_LeaseExpirationYear" name="LeaseExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_CommitmentsContingenciesAndLitigationLineItems" name="CommitmentsContingenciesAndLitigationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CommitmentsContingenciesAndLitigationTable" name="CommitmentsContingenciesAndLitigationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TwoThousandNineteenEquityAndIncentiveCompensationPlanMember" name="TwoThousandNineteenEquityAndIncentiveCompensationPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TwoThousandNineteenInducementEquityPlanMember" name="TwoThousandNineteenInducementEquityPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantTransferredBetweenPlans" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantTransferredBetweenPlans" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRestrictedStockUnitsGrantsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRestrictedStockUnitsGrantsInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceStockUnitsGrantsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceStockUnitsGrantsInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsForPerformanceStockUnits" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsForPerformanceStockUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsForPerformanceResultsAttained" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsForPerformanceResultsAttained" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardsForfeituresInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardsForfeituresInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesUnavailableForGrantUponExpirationOfPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesUnavailableForGrantUponExpirationOfPlan" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_TwoThousandNineteenMember" name="TwoThousandNineteenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TwoThousandTenMember" name="TwoThousandTenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TwoThousandNineteenEmployeeInducementEquityPlanMember" name="TwoThousandNineteenEmployeeInducementEquityPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TwoThousandNineteenEmployeeStockPurchasePlanMember" name="TwoThousandNineteenEmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_EmployeeServiceShareBasedCompensationTaxBenefitExpenseFromCompensationExpense" name="EmployeeServiceShareBasedCompensationTaxBenefitExpenseFromCompensationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_PercentageOfFairMarketValueForWhichExercisePriceIsDesignatedOnIncentiveAndNonqualifiedStockOptionGrants" name="PercentageOfFairMarketValueForWhichExercisePriceIsDesignatedOnIncentiveAndNonqualifiedStockOptionGrants" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardOptionsGranted" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardOptionsGranted" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardIntrinsicValueClosingPrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardIntrinsicValueClosingPrice" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGranted" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGranted" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPaidInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPaidInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateMarketValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateMarketValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="syna_ShareBasedCompensationAwardTrancheFourMember" name="ShareBasedCompensationAwardTrancheFourMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TSRPercentileBelow25Member" name="TSRPercentileBelow25Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TSRPercentileAbove75Member" name="TSRPercentileAbove75Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_TSRPercentile50Member" name="TSRPercentile50Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ThreeYearPerformanceMember" name="ThreeYearPerformanceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FourYearPerformanceMember" name="FourYearPerformanceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FiscalTwoThousandTwentyMSUGrantsMember" name="FiscalTwoThousandTwentyMSUGrantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FiscalTwoThousandEighteenMSUGrantsMember" name="FiscalTwoThousandEighteenMSUGrantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FiscalTwoThousandNineteenMSUGrantsMember" name="FiscalTwoThousandNineteenMSUGrantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FiscalTwoThousandTwentyOneMSUGrantsMember" name="FiscalTwoThousandTwentyOneMSUGrantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_October2020MSUGrantsMember" name="October2020MSUGrantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_PercentageOfPotentialPayout" name="PercentageOfPotentialPayout" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DeliveryOfTargetedSharesInPercentageDeliveredByEntity" name="DeliveryOfTargetedSharesInPercentageDeliveredByEntity" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_TsrDecreaseInPercentagePoints" name="TsrDecreaseInPercentagePoints" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_TsrPercentileRelativeToRussellTwoThousandIndex" name="TsrPercentileRelativeToRussellTwoThousandIndex" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodCorrelationCoefficient" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodCorrelationCoefficient" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateFairValuePerShare" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateFairValuePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_SoxIndexMember" name="SoxIndexMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ThresholdPercentageOfEarningsPerShareToTriggerPayOut" name="ThresholdPercentageOfEarningsPerShareToTriggerPayOut" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_StockPurchasesUnderEmployeeStockPurchasePlanAsCompensationMaximumSubjectToLegalRestrictionsAndLimitations" name="StockPurchasesUnderEmployeeStockPurchasePlanAsCompensationMaximumSubjectToLegalRestrictionsAndLimitations" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_EmployeeCommonStockPurchasesThroughPayrollDeductionsUnderEmployeeStockPurchasePlanPriceAsPercentageOfFairMarketValue" name="EmployeeCommonStockPurchasesThroughPayrollDeductionsUnderEmployeeStockPurchasePlanPriceAsPercentageOfFairMarketValue" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_OfferingPeriodExtendsUnderEmployeeStockPurchasePlan" name="OfferingPeriodExtendsUnderEmployeeStockPurchasePlan" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_TwoThousandTenEmployeeStockPurchasePlanMember" name="TwoThousandTenEmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMinimumHistoricalTerm" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMinimumHistoricalTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_PeriodOverWhichShareBasedCompensationIsAmortizedDuration" name="PeriodOverWhichShareBasedCompensationIsAmortizedDuration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_DefinedContributionPlansEligibleEmployeeContributionsEmployeesFiftyAndOverAnnualLimit" name="DefinedContributionPlansEligibleEmployeeContributionsEmployeesFiftyAndOverAnnualLimit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_ContributionsByEmployerMatchingContributions" name="ContributionsByEmployerMatchingContributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_IncomeLossFromOperationsBeforeProvisionBenefitForIncomeTaxesLineItems" name="IncomeLossFromOperationsBeforeProvisionBenefitForIncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_IncomeLossFromOperationsBeforeProvisionBenefitForIncomeTaxesTable" name="IncomeLossFromOperationsBeforeProvisionBenefitForIncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_IncomeTaxDisclosureLineItems" name="IncomeTaxDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_IncomeTaxDisclosureTable" name="IncomeTaxDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_NetOperatingLossBeginningOfExpirationPeriod" name="NetOperatingLossBeginningOfExpirationPeriod" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_UnrecognizedTaxBenefitsDecreasesResultingFromRemeasurement" name="UnrecognizedTaxBenefitsDecreasesResultingFromRemeasurement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_IncreaseDecreaseInUnrecognizedTaxBenefitIncomeTaxPenaltiesAndInterestAccrued" name="IncreaseDecreaseInUnrecognizedTaxBenefitIncomeTaxPenaltiesAndInterestAccrued" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="syna_NumberOfProductCategories" name="NumberOfProductCategories" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="syna_InternetOfThingsAndMobilePCProductApplicationsMember" name="InternetOfThingsAndMobilePCProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_OtherForeignCountryMember" name="OtherForeignCountryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_MobileProductApplicationsMember" name="MobileProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_PcProductApplicationsMember" name="PcProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_InternetOfThingsProductApplicationsMember" name="InternetOfThingsProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CustomerDMember" name="CustomerDMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CustomerEMember" name="CustomerEMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_CustomerFMember" name="CustomerFMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FiscalTwoThousandTwentyOneRestructuringPlanMember" name="FiscalTwoThousandTwentyOneRestructuringPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_EmployeeSeveranceAndBenefitsMember" name="EmployeeSeveranceAndBenefitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="syna_FiscalTwoThousandTwentyRestructuringPlanMember" name="FiscalTwoThousandTwentyRestructuringPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
