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  <xs:element id="sitm_InducementPlanMember" abstract="true" name="InducementPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_TwentyTwentyFiveGoalsMember" abstract="true" name="TwentyTwentyFiveGoalsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_TwentyTwentyTwoGoalsMember" abstract="true" name="TwentyTwentyTwoGoalsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_TwentyTwentyThreeGoalsMember" abstract="true" name="TwentyTwentyThreeGoalsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_RestrictedStockUnitsLiabilityBasedAwardMember" abstract="true" name="RestrictedStockUnitsLiabilityBasedAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_MultiYearPerformanceRestrictedStockUnitAwardMember" abstract="true" name="MultiYearPerformanceRestrictedStockUnitAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_PerformanceRestrictedStockUnitAwardMember" abstract="true" name="PerformanceRestrictedStockUnitAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_TotalStockholderPerformanceRestrictedStockUnitAwardMember" abstract="true" name="TotalStockholderPerformanceRestrictedStockUnitAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_BonusAndRetentionPlanActualPayoutPercentages" abstract="false" name="BonusAndRetentionPlanActualPayoutPercentages" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sitm_PerformancePeriodOfCommonStock" abstract="false" name="PerformancePeriodOfCommonStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sitm_PerformancePeriod" abstract="false" name="PerformancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sitm_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sitm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRFRollForward" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRFRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sitm_EquityAwardMember" abstract="true" name="EquityAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_LiabilityBasedAwardsToBeSettledInEquityMember" abstract="true" name="LiabilityBasedAwardsToBeSettledInEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_EquityAndLiabilityBasedAwardsMember" abstract="true" name="EquityAndLiabilityBasedAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopmentFederal" abstract="false" name="DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopmentFederal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopmentState" abstract="false" name="DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopmentState" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_EffectiveIncomeTaxRateReconciliationRestrictedStockUnitExcessTaxExpenseAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationRestrictedStockUnitExcessTaxExpenseAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_EffectiveIncomeTaxRateReconciliationSection162mLimitationAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationSection162mLimitationAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_EffectiveIncomeTaxRateReconciliationForeignRestrictedStockUnitAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignRestrictedStockUnitAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_EffectiveIncomeTaxRateReconciliationRestrictedStockUnitExcessTaxExpensePercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationRestrictedStockUnitExcessTaxExpensePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sitm_EffectiveIncomeTaxRateReconciliationSection162mLimitationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationSection162mLimitationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sitm_EffectiveIncomeTaxRateReconciliationForeignRestrictedStockUnitPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignRestrictedStockUnitPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sitm_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_OtherManufacturingOverheads" abstract="false" name="OtherManufacturingOverheads" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_RenesasAssetPurchaseAgreementMember" abstract="true" name="RenesasAssetPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_WellsFargoMember" abstract="true" name="WellsFargoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_PaymentsforAssetAcquisitions" abstract="false" name="PaymentsforAssetAcquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_AssetAcquisitionConsiderationTransferredEquityInterestSharesIssuedAndIssuableNumberOfShares" abstract="false" name="AssetAcquisitionConsiderationTransferredEquityInterestSharesIssuedAndIssuableNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sitm_AssetAcquisitionConsecutiveTradingDays" abstract="false" name="AssetAcquisitionConsecutiveTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sitm_AssetAcquisitionConsiderationTransferredEquityInterestsIssuedAndIssuableSharePriceFloorPrice" abstract="false" name="AssetAcquisitionConsiderationTransferredEquityInterestsIssuedAndIssuableSharePriceFloorPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="sitm_ValuationAllowancesAndReservesAdditionsChargedToExpensesOrOtherAccounts" abstract="false" name="ValuationAllowancesAndReservesAdditionsChargedToExpensesOrOtherAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_ValuationAllowancesAndReservesDeductionsCreditedToExpensesOrOtherAccounts" abstract="false" name="ValuationAllowancesAndReservesDeductionsCreditedToExpensesOrOtherAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sitm_LionelBonnotMember" abstract="true" name="LionelBonnotMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_FariborzAssaderaghiMember" abstract="true" name="FariborzAssaderaghiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sitm_PiyushSevaliaMember" abstract="true" name="PiyushSevaliaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
