<?xml version="1.0" encoding="us-ascii"?>
<!-- DFS ActiveDisclosure(SM) XBRL Schema Document - http://www.dfsco.com/financial-services/ -->
<!-- Creation Date      : 2017-11-09T02:03:53.3211091+00:00 -->
<!-- Version            : 2.5.0.9 -->
<!-- Package ID         : BDE7974715CF77EB7B110658E38A1762-0000817720-001708 -->
<!-- Copyright (c) 2017 Donnelley Financial, LLC. All Rights Reserved. -->
<schema xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2017-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2011-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2017-01-31" xmlns:invest="http://xbrl.sec.gov/invest/2013-01-31" xmlns:syna="http://www.synaptics.com/20170930" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:us-gaap="http://fasb.org/us-gaap/2017-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2014-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2017-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:currency="http://xbrl.sec.gov/currency/2017-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2017-01-31" xmlns:sic="http://xbrl.sec.gov/sic/2011-01-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.synaptics.com/20170930" xmlns="http://www.w3.org/2001/XMLSchema">
  <import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <import schemaLocation="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd" namespace="http://fasb.org/us-gaap/2017-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd" namespace="http://xbrl.sec.gov/dei/2014-01-31" />
  <import schemaLocation="http://xbrl.fasb.org/us-gaap/2017/elts/us-types-2017-01-31.xsd" namespace="http://fasb.org/us-types/2017-01-31" />
  <import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
  <import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
  <import schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" namespace="http://xbrl.sec.gov/country/2017-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd" namespace="http://xbrl.sec.gov/currency/2017-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/exch/2017/exch-2017-01-31.xsd" namespace="http://xbrl.sec.gov/exch/2017-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" namespace="http://xbrl.sec.gov/invest/2013-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" namespace="http://xbrl.sec.gov/naics/2017-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" namespace="http://xbrl.sec.gov/sic/2011-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" namespace="http://xbrl.sec.gov/stpr/2011-01-31" />
  <annotation>
    <appinfo>
      <link:roleType id="TemplateLink" roleURI="http://www.synaptics.com/20170930/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-20170930_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-20170930_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-20170930_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-20170930_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/20170930/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/20170930/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnaudited" id="Role_StatementCondensedConsolidatedBalanceSheetsUnaudited">
        <link:definition>100010 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</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/20170930/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsParentheticalUnaudited" id="Role_StatementCondensedConsolidatedBalanceSheetsParentheticalUnaudited">
        <link:definition>100020 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited)</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/20170930/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsUnaudited" id="Role_StatementCondensedConsolidatedStatementsOfOperationsUnaudited">
        <link:definition>100030 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</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/20170930/taxonomy/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncomeLossUnaudited" id="Role_StatementCondensedConsolidatedStatementsOfComprehensiveIncomeLossUnaudited">
        <link:definition>100040 - Statement - Condensed Consolidated Statements of Comprehensive Income/ (Loss) (Unaudited)</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/20170930/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited" id="Role_StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited">
        <link:definition>100050 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</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/20170930/taxonomy/role/DisclosureBasisOfPresentation" id="Role_DisclosureBasisOfPresentation">
        <link:definition>100060 - Disclosure - Basis of Presentation</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/20170930/taxonomy/role/DisclosureRevenueRecognition" id="Role_DisclosureRevenueRecognition">
        <link:definition>100070 - Disclosure - Revenue Recognition</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/20170930/taxonomy/role/DisclosureNetIncomePerShare" id="Role_DisclosureNetIncomePerShare">
        <link:definition>100080 - Disclosure - Net Income 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/20170930/taxonomy/role/DisclosureFairValue" id="Role_DisclosureFairValue">
        <link:definition>100090 - Disclosure - Fair Value</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/20170930/taxonomy/role/DisclosureInventories" id="Role_DisclosureInventories">
        <link:definition>100100 - Disclosure - Inventories</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/20170930/taxonomy/role/DisclosureAcquisitions" id="Role_DisclosureAcquisitions">
        <link:definition>100110 - Disclosure - Acquisitions</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/20170930/taxonomy/role/DisclosureAcquiredIntangiblesAndGoodwill" id="Role_DisclosureAcquiredIntangiblesAndGoodwill">
        <link:definition>100120 - Disclosure - Acquired Intangibles and Goodwill</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/20170930/taxonomy/role/DisclosureOtherAccruedLiabilities" id="Role_DisclosureOtherAccruedLiabilities">
        <link:definition>100130 - Disclosure - Other Accrued Liabilities</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/20170930/taxonomy/role/DisclosureIndemnificationsContingenciesAndLegalProceedings" id="Role_DisclosureIndemnificationsContingenciesAndLegalProceedings">
        <link:definition>100140 - Disclosure - Indemnifications, Contingencies and Legal Proceedings</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/20170930/taxonomy/role/DisclosureDebt" id="Role_DisclosureDebt">
        <link:definition>100150 - 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/20170930/taxonomy/role/DisclosureShareBasedCompensation" id="Role_DisclosureShareBasedCompensation">
        <link:definition>100160 - 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/20170930/taxonomy/role/DisclosureShareBasedCompensationTables" id="Role_DisclosureShareBasedCompensationTables">
        <link:definition>100170 - 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/20170930/taxonomy/role/DisclosureIncomeTaxes" id="Role_DisclosureIncomeTaxes">
        <link:definition>100180 - 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformation" id="Role_DisclosureSegmentCustomersAndGeographicInformation">
        <link:definition>100190 - 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/20170930/taxonomy/role/DisclosureComprehensiveIncomeLoss" id="Role_DisclosureComprehensiveIncomeLoss">
        <link:definition>100200 - Disclosure - 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/20170930/taxonomy/role/DisclosureSubsequentEvent" id="Role_DisclosureSubsequentEvent">
        <link:definition>100210 - Disclosure - Subsequent Event</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/20170930/taxonomy/role/DisclosureBasisOfPresentationPolicies" id="Role_DisclosureBasisOfPresentationPolicies">
        <link:definition>100220 - Disclosure - Basis of Presentation (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/20170930/taxonomy/role/DisclosureNetIncomePerShareTables" id="Role_DisclosureNetIncomePerShareTables">
        <link:definition>100230 - Disclosure - Net Income 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/20170930/taxonomy/role/DisclosureFairValueTables" id="Role_DisclosureFairValueTables">
        <link:definition>100240 - Disclosure - Fair Value (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/20170930/taxonomy/role/DisclosureInventoriesTables" id="Role_DisclosureInventoriesTables">
        <link:definition>100250 - Disclosure - Inventories (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/20170930/taxonomy/role/DisclosureAcquisitionsTables" id="Role_DisclosureAcquisitionsTables">
        <link:definition>100260 - Disclosure - Acquisitions (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/20170930/taxonomy/role/DisclosureAcquiredIntangiblesAndGoodwillTables" id="Role_DisclosureAcquiredIntangiblesAndGoodwillTables">
        <link:definition>100270 - Disclosure - Acquired Intangibles and Goodwill (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/20170930/taxonomy/role/DisclosureOtherAccruedLiabilitiesTables" id="Role_DisclosureOtherAccruedLiabilitiesTables">
        <link:definition>100280 - Disclosure - Other Accrued Liabilities (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/20170930/taxonomy/role/DisclosureDebtTables" id="Role_DisclosureDebtTables">
        <link:definition>100290 - 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationTables" id="Role_DisclosureSegmentCustomersAndGeographicInformationTables">
        <link:definition>100300 - 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/20170930/taxonomy/role/DisclosureBasisOfPresentationAdditionalInformationDetail" id="Role_DisclosureBasisOfPresentationAdditionalInformationDetail">
        <link:definition>100310 - Disclosure - Basis of Presentation - 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/20170930/taxonomy/role/DisclosureRevenueRecognitionAdditionalInformationDetail" id="Role_DisclosureRevenueRecognitionAdditionalInformationDetail">
        <link:definition>100320 - Disclosure - Revenue Recognition - 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/20170930/taxonomy/role/DisclosureNetIncomePerShareComputationOfBasicAndDilutedNetIncomePerShareDetail" id="Role_DisclosureNetIncomePerShareComputationOfBasicAndDilutedNetIncomePerShareDetail">
        <link:definition>100330 - Disclosure - Net Income 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/20170930/taxonomy/role/DisclosureNetIncomePerShareAdditionalInformationDetail" id="Role_DisclosureNetIncomePerShareAdditionalInformationDetail">
        <link:definition>100340 - Disclosure - Net Income Per Share - 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/20170930/taxonomy/role/DisclosureFairValueFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" id="Role_DisclosureFairValueFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail">
        <link:definition>100350 - Disclosure - Fair Value - Financial Assets Measured at Fair Value on a Recurring Basis (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/20170930/taxonomy/role/DisclosureFairValueAdditionalInformationDetail" id="Role_DisclosureFairValueAdditionalInformationDetail">
        <link:definition>100360 - Disclosure - Fair Value - 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/20170930/taxonomy/role/DisclosureInventoriesInventoriesDetail" id="Role_DisclosureInventoriesInventoriesDetail">
        <link:definition>100370 - Disclosure - Inventories - 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/20170930/taxonomy/role/DisclosureAcquisitionsAdditionalInformationDetail" id="Role_DisclosureAcquisitionsAdditionalInformationDetail">
        <link:definition>100380 - Disclosure - Acquisitions - 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/20170930/taxonomy/role/DisclosureAcquisitionsSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetail" id="Role_DisclosureAcquisitionsSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetail">
        <link:definition>100390 - Disclosure - Acquisitions - 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/20170930/taxonomy/role/DisclosureAcquisitionsSummaryOfUnauditedProFormaFinancialInformationPresentsCombinedResultsOfOperationsDetail" id="Role_DisclosureAcquisitionsSummaryOfUnauditedProFormaFinancialInformationPresentsCombinedResultsOfOperationsDetail">
        <link:definition>100400 - Disclosure - Acquisitions - 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/20170930/taxonomy/role/DisclosureAcquisitionsSummaryOfProFormaAdjustmentsUsedToArriveProFormaNetIncomeDetail" id="Role_DisclosureAcquisitionsSummaryOfProFormaAdjustmentsUsedToArriveProFormaNetIncomeDetail">
        <link:definition>100410 - Disclosure - Acquisitions - Summary of Pro Forma Adjustments Used to Arrive Pro Forma Net Income (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/20170930/taxonomy/role/DisclosureAcquiredIntangiblesAndGoodwillSummaryOfLifeGrossCarryingValueAndRelatedAccumulatedAmortizationOfAcquiredIntangibleAssetsDetail" id="Role_DisclosureAcquiredIntangiblesAndGoodwillSummaryOfLifeGrossCarryingValueAndRelatedAccumulatedAmortizationOfAcquiredIntangibleAssetsDetail">
        <link:definition>100420 - Disclosure - Acquired Intangibles and Goodwill - Summary of Life, Gross Carrying Value and Related Accumulated Amortization of Acquired 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/20170930/taxonomy/role/DisclosureAcquiredIntangiblesAndGoodwillAdditionalInformationDetail" id="Role_DisclosureAcquiredIntangiblesAndGoodwillAdditionalInformationDetail">
        <link:definition>100430 - Disclosure - Acquired Intangibles and Goodwill - 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/20170930/taxonomy/role/DisclosureAcquiredIntangiblesAndGoodwillScheduleOfExpectedAnnualAggregateAmortizationExpenseDetail" id="Role_DisclosureAcquiredIntangiblesAndGoodwillScheduleOfExpectedAnnualAggregateAmortizationExpenseDetail">
        <link:definition>100440 - Disclosure - Acquired Intangibles and Goodwill - 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/20170930/taxonomy/role/DisclosureAcquiredIntangiblesAndGoodwillScheduleOfChangesInGoodwillDetail" id="Role_DisclosureAcquiredIntangiblesAndGoodwillScheduleOfChangesInGoodwillDetail">
        <link:definition>100450 - Disclosure - Acquired Intangibles and Goodwill - 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/20170930/taxonomy/role/DisclosureOtherAccruedLiabilitiesOtherAccruedLiabilitiesDetail" id="Role_DisclosureOtherAccruedLiabilitiesOtherAccruedLiabilitiesDetail">
        <link:definition>100460 - Disclosure - Other Accrued Liabilities - 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/20170930/taxonomy/role/DisclosureIndemnificationsContingenciesAndLegalProceedingsAdditionalInformationDetail" id="Role_DisclosureIndemnificationsContingenciesAndLegalProceedingsAdditionalInformationDetail">
        <link:definition>100470 - Disclosure - Indemnifications, Contingencies and Legal Proceedings - 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/20170930/taxonomy/role/DisclosureDebtAdditionalInformationDetail" id="Role_DisclosureDebtAdditionalInformationDetail">
        <link:definition>100480 - 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/20170930/taxonomy/role/DisclosureDebtScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesDetail" id="Role_DisclosureDebtScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesDetail">
        <link:definition>100490 - 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/20170930/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationAdditionalInformationDetail">
        <link:definition>100500 - Disclosure - Share-Based Compensation - 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/20170930/taxonomy/role/DisclosureShareBasedCompensationShareBasedCompensationAndRelatedTaxBenefitRecognizedInCondensedConsolidatedStatementsOfIncomeDetail" id="Role_DisclosureShareBasedCompensationShareBasedCompensationAndRelatedTaxBenefitRecognizedInCondensedConsolidatedStatementsOfIncomeDetail">
        <link:definition>100510 - Disclosure - Share-Based Compensation - Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Income (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/20170930/taxonomy/role/DisclosureStockBasedCompensationBalanceOfOutstandingAndExercisableStockOptionsDetail" id="Role_DisclosureStockBasedCompensationBalanceOfOutstandingAndExercisableStockOptionsDetail">
        <link:definition>100520 - Disclosure - Stock Based Compensation - Balance of Outstanding and Exercisable Stock Options (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/20170930/taxonomy/role/DisclosureShareBasedCompensationStockOptionsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationStockOptionsAdditionalInformationDetail">
        <link:definition>100530 - 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/20170930/taxonomy/role/DisclosureShareBasedCompensationBalanceAndAggregateIntrinsicValueOfStockUnitsDetail" id="Role_DisclosureShareBasedCompensationBalanceAndAggregateIntrinsicValueOfStockUnitsDetail">
        <link:definition>100540 - Disclosure - Share-Based Compensation - Balance and Aggregate Intrinsic Value of Stock Units (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/20170930/taxonomy/role/DisclosureShareBasedCompensationDeferredStockUnitsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationDeferredStockUnitsAdditionalInformationDetail">
        <link:definition>100550 - Disclosure - Share-Based Compensation - Deferred 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/20170930/taxonomy/role/DisclosureShareBasedCompensationMarketStockUnitsAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationMarketStockUnitsAdditionalInformationDetail">
        <link:definition>100560 - 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/20170930/taxonomy/role/DisclosureShareBasedCompensationEmployeeStockPurchasePlanAdditionalInformationDetail" id="Role_DisclosureShareBasedCompensationEmployeeStockPurchasePlanAdditionalInformationDetail">
        <link:definition>100570 - 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/20170930/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" id="Role_DisclosureIncomeTaxesAdditionalInformationDetail">
        <link:definition>100580 - 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationAdditionalInformationDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationAdditionalInformationDetail">
        <link:definition>100590 - 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationNetRevenueWithinGeographicAreasBasedOnCustomersLocationsDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationNetRevenueWithinGeographicAreasBasedOnCustomersLocationsDetail">
        <link:definition>100600 - 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationNetRevenueFromExternalCustomersDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationNetRevenueFromExternalCustomersDetail">
        <link:definition>100610 - 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationMajorCustomersAsPercentageOfNetRevenueDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationMajorCustomersAsPercentageOfNetRevenueDetail">
        <link:definition>100620 - Disclosure - Segment, Customers, and Geographic Information - Major Customers as Percentage of 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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationMajorCustomerAccountsReceivableAsPercentageOfAccountsReceivableDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationMajorCustomerAccountsReceivableAsPercentageOfAccountsReceivableDetail">
        <link:definition>100630 - Disclosure - Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (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/20170930/taxonomy/role/DisclosureSegmentCustomersAndGeographicInformationMajorCustomerAccountsReceivableAsPercentageOfAccountsReceivableParentheticalDetail" id="Role_DisclosureSegmentCustomersAndGeographicInformationMajorCustomerAccountsReceivableAsPercentageOfAccountsReceivableParentheticalDetail">
        <link:definition>100640 - Disclosure - Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (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/20170930/taxonomy/role/DisclosureSubsequentEventAdditionalInformationDetail" id="Role_DisclosureSubsequentEventAdditionalInformationDetail">
        <link:definition>100650 - Disclosure - Subsequent Event - 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>
    </appinfo>
  </annotation>
  <element id="syna_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCompensation" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCompensation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilities" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_BusinessCombinationProFormaInformationCostOfAcquiredBuyerTransactionCosts" name="BusinessCombinationProFormaInformationCostOfAcquiredBuyerTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_BusinessCombinationProFormaInformationInterestExpenseAdjustments" name="BusinessCombinationProFormaInformationInterestExpenseAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_BusinessCombinationProFormaInformationAmortizationOfIntangibleAssetsAdjustment" name="BusinessCombinationProFormaInformationAmortizationOfIntangibleAssetsAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_BusinessCombinationProFormaInformationDepreciationAdjustments" name="BusinessCombinationProFormaInformationDepreciationAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_BusinessCombinationProFormaInformationIncomeTaxAdjustment" name="BusinessCombinationProFormaInformationIncomeTaxAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_FiniteLivedIntangibleAssetsAmortizationExpenseYearSix" name="FiniteLivedIntangibleAssetsAmortizationExpenseYearSix" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearSix" name="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearSix" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_FiniteLivedIntangibleAssetsAmortizationExpenseToBeDetermined" name="FiniteLivedIntangibleAssetsAmortizationExpenseToBeDetermined" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_AmortizationOfIntangibleAssetsIncludedInOperatingExpense" name="AmortizationOfIntangibleAssetsIncludedInOperatingExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_NonCashInterestIncome" name="NonCashInterestIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_IncreaseDecreaseInAcquisitionRelatedLiabilities" name="IncreaseDecreaseInAcquisitionRelatedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_PaymentsForInvestmentInDirectFinancingLease" name="PaymentsForInvestmentInDirectFinancingLease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_PaymentForPayrollTaxesForDeferredStockAndMarketStockUnits" name="PaymentForPayrollTaxesForDeferredStockAndMarketStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_RevenueRecognitionTextBlock" name="RevenueRecognitionTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_DeferredStockUnitsMember" name="DeferredStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_ConexantSystemsLLCMember" name="ConexantSystemsLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_MarvellTechnologyGroupLtdMember" name="MarvellTechnologyGroupLtdMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_ScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesTableTextBlock" name="ScheduleOfContractualInterestExpenseAndAmortizationOfDiscountOnNotesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_ForeignCurrencyTransactionRealizedAndUnrealizedGainLossNetOfTax" name="ForeignCurrencyTransactionRealizedAndUnrealizedGainLossNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_StockRotationRightsForInventoryPerYear" name="StockRotationRightsForInventoryPerYear" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_BusinessCombinationPurchasePriceAdjustment" name="BusinessCombinationPurchasePriceAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_BusinessAcquisitionStockAppreciationRightsLiability" name="BusinessAcquisitionStockAppreciationRightsLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_PurchasePriceHeldInEscrow" name="PurchasePriceHeldInEscrow" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_StockPurchaseAgreementMember" name="StockPurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_EscrowObligationsUnderPurchaseAgreementMember" name="EscrowObligationsUnderPurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_AssetPurchaseAgreementMember" name="AssetPurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_DiscountRatesAppliedToEstimatedCashFlowsForAllIntangibleAssetsAcquired" name="DiscountRatesAppliedToEstimatedCashFlowsForAllIntangibleAssetsAcquired" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_BusinessCombinationProFormaInformationAdjustment" name="BusinessCombinationProFormaInformationAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_DisplayDriverTechnologyMember" name="DisplayDriverTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_AudioAndVideoTechnologyMember" name="AudioAndVideoTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_FingerprintAuthenticationTechnologyMember" name="FingerprintAuthenticationTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_LicensedTechnologyAndOtherMember" name="LicensedTechnologyAndOtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerObligation" name="CustomerObligation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_AccruedLiabilitiesForInventoryPurchase" name="AccruedLiabilitiesForInventoryPurchase" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_DebtInstrumentAdditionalFaceAmount" name="DebtInstrumentAdditionalFaceAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_OptionToPurchaseAdditionalPrincipalAmountOfNotesGrantedToInitialPurchasers" name="OptionToPurchaseAdditionalPrincipalAmountOfNotesGrantedToInitialPurchasers" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_ProceedsFromIssuanceOfConvertibleDebt" name="ProceedsFromIssuanceOfConvertibleDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_NumberOfBusinessAcquisitionsProvidedWithAdditionalCashResources" name="NumberOfBusinessAcquisitionsProvidedWithAdditionalCashResources" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_PurchaseAgreementMember" name="PurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_ZeroPointFiveZeroPercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" name="ZeroPointFiveZeroPercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_WellsFargoSecuritiesLLCMember" name="WellsFargoSecuritiesLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CreditAgreementMember" name="CreditAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_TermLoanArrangementMember" name="TermLoanArrangementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_AmendmentAndRestatementAgreementMember" name="AmendmentAndRestatementAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_ForFourFiscalQuartersEndingAfterDateOfMaterialAcquisitionMember" name="ForFourFiscalQuartersEndingAfterDateOfMaterialAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_ThereafterMember" name="ThereafterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_ConvertibleDebtPrincipalAmountInMultiples" name="ConvertibleDebtPrincipalAmountInMultiples" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_DebtInstrumentConvertibleNumberOfSharesPerThousandOfPrincipalAmountOfNotes" name="DebtInstrumentConvertibleNumberOfSharesPerThousandOfPrincipalAmountOfNotes" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_PercentageOfPrincipalAmountOfNotesEqualToRepurchasePrice" name="PercentageOfPrincipalAmountOfNotesEqualToRepurchasePrice" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_NonconvertibleDebtBorrowingRate" name="NonconvertibleDebtBorrowingRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="syna_DebtInstrumentInitialPurchasersDiscount" name="DebtInstrumentInitialPurchasersDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_DebtInstrumentLegalAccountingAndPrintingCosts" name="DebtInstrumentLegalAccountingAndPrintingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_ConvertibleDebtIssuanceCostsProRataToEquityComponents" name="ConvertibleDebtIssuanceCostsProRataToEquityComponents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_ConvertibleDebtIssuanceCostsProRataToDebtComponents" name="ConvertibleDebtIssuanceCostsProRataToDebtComponents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="syna_DebtInstrumentAmortizationPeriod" name="DebtInstrumentAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_LineOfCreditFacilityAllowableRequestsForAdditionalBorrowing" name="LineOfCreditFacilityAllowableRequestsForAdditionalBorrowing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_LineOfCreditFacilityRepaymentDateDescription" name="LineOfCreditFacilityRepaymentDateDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_PercentageOfVotingCapitalStockOfCertainForeignSubsidiariesCollateralized" name="PercentageOfVotingCapitalStockOfCertainForeignSubsidiariesCollateralized" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_MaximumAccountsReceivableFinancings" name="MaximumAccountsReceivableFinancings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="syna_MaximumPermittedLeverageRatio" name="MaximumPermittedLeverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="syna_FixedCoverageRatio" name="FixedCoverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_MinimumInterestCoverageRatio" name="MinimumInterestCoverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardIntrinsicValueClosingPrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardIntrinsicValueClosingPrice" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsForPerformanceResultsAttained" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsForPerformanceResultsAttained" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_MarketStockUnitsMember" name="MarketStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_PotentialPayoutAdjustmentRatio" name="PotentialPayoutAdjustmentRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_PercentageOfPotentialPayout" name="PercentageOfPotentialPayout" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_IncomeTaxDisclosureLineItems" name="IncomeTaxDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_IncomeTaxDisclosureTable" name="IncomeTaxDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_NumberOfProductCategories" name="NumberOfProductCategories" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="syna_OtherForeignCountryMember" name="OtherForeignCountryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_MobileProductApplicationsMember" name="MobileProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_PcProductApplicationsMember" name="PcProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_InternetOfThingsProductApplicationsMember" name="InternetOfThingsProductApplicationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerAMember" name="CustomerAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerBMember" name="CustomerBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerCMember" name="CustomerCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerDMember" name="CustomerDMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerEMember" name="CustomerEMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="syna_CustomerFMember" name="CustomerFMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</schema>
