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  <xs:element id="syna_DebtInstrumentCovenantMinimumInterestCoverageRatio" abstract="false" name="DebtInstrumentCovenantMinimumInterestCoverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="syna_DebtInstrumentCovenantAnniversaryPeriod" abstract="false" name="DebtInstrumentCovenantAnniversaryPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="syna_TreasuryStockCommonParOrStatedValuePerShare" abstract="false" name="TreasuryStockCommonParOrStatedValuePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="syna_PurchasesOfCappedCallsInConnectionWithConvertibleSeniorNotes" abstract="false" name="PurchasesOfCappedCallsInConnectionWithConvertibleSeniorNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="syna_DebtInstrumentRedemptionThresholdPercentageOfStockPriceTrigger" abstract="false" name="DebtInstrumentRedemptionThresholdPercentageOfStockPriceTrigger" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="syna_DebtInstrumentRedemptionThresholdTradingDays" abstract="false" name="DebtInstrumentRedemptionThresholdTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="syna_DebtInstrumentRedemptionThresholdConsecutiveTradingDays" abstract="false" name="DebtInstrumentRedemptionThresholdConsecutiveTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="syna_DebtInstrumentCovenantMinimumThresholdAggregatePrincipalAmountOfNotesOutstanding" abstract="false" name="DebtInstrumentCovenantMinimumThresholdAggregatePrincipalAmountOfNotesOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="syna_OptionIndexedToIssuersEquityCapPrice" abstract="false" name="OptionIndexedToIssuersEquityCapPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="syna_SeniorNotes2024Member" abstract="true" name="SeniorNotes2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_SeniorNotes2025Member" abstract="true" name="SeniorNotes2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_SeniorNotes2026AndThereafterMember" abstract="true" name="SeniorNotes2026AndThereafterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_DebtInstrumentRedemptionPricePercentageIncludingAccruedAndUnpaidInterest" abstract="false" name="DebtInstrumentRedemptionPricePercentageIncludingAccruedAndUnpaidInterest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="syna_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_TwoThousandNineteenInducementEquityPlanMember" abstract="true" name="TwoThousandNineteenInducementEquityPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_MarketStockUnitsMember" abstract="true" name="MarketStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_PerformanceStockUnitsMember" abstract="true" name="PerformanceStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_ShareBasedCompensationArrangementByShareBasedPaymentAwardIntrinsicValueClosingPrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardIntrinsicValueClosingPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="syna_IncreaseDecreaseInUnrecognizedTaxBenefitIncomeTaxPenaltiesAndInterestAccrued" abstract="false" name="IncreaseDecreaseInUnrecognizedTaxBenefitIncomeTaxPenaltiesAndInterestAccrued" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="syna_NumberOfProductCategories" abstract="false" name="NumberOfProductCategories" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="syna_EnterpriseAndAutomotiveProductApplicationsMember" abstract="true" name="EnterpriseAndAutomotiveProductApplicationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_InternetOfThingsProductApplicationsMember" abstract="true" name="InternetOfThingsProductApplicationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_MobileProductApplicationsMember" abstract="true" name="MobileProductApplicationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_CoreIotMember" abstract="true" name="CoreIotMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_OtherForeignCountryMember" abstract="true" name="OtherForeignCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_CustomerCMember" abstract="true" name="CustomerCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_Q12025RestructuringPlanMember" abstract="true" name="Q12025RestructuringPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_AssetAcquisitionMinimumPeriodPostClosingToGrantRightsForManufacturingAndSellingLicensedProducts" abstract="false" name="AssetAcquisitionMinimumPeriodPostClosingToGrantRightsForManufacturingAndSellingLicensedProducts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="syna_AssetAcquisitionMinimumPeriodPostProductionReadinessToGrantRightsForManufacturingAndSellingRoadmapProducts" abstract="false" name="AssetAcquisitionMinimumPeriodPostProductionReadinessToGrantRightsForManufacturingAndSellingRoadmapProducts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="syna_MichaelHurlstonMember" abstract="true" name="MichaelHurlstonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="syna_LisaBodensteinerMember" abstract="true" name="LisaBodensteinerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
