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<!-- Creation Date :2022-02-25T14:33:42.1035+00:00 -->
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  <xsd:element id="sitm_PriceChangesAndOtherRevenueReservesCurrent" name="PriceChangesAndOtherRevenueReservesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_ProceedsFromIssuanceOfCommonStockNetOfUnderwritingDiscountsAndCommissions" name="ProceedsFromIssuanceOfCommonStockNetOfUnderwritingDiscountsAndCommissions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="sitm_PropertyAndEquipmentNetRelatedPartiesNoncurrent" name="PropertyAndEquipmentNetRelatedPartiesNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="sitm_ReclassificationOfDeferredOfferingCostsIntoStockholdersEquity" name="ReclassificationOfDeferredOfferingCostsIntoStockholdersEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_ReductionOfResearchAndDevelopmentExpenses" name="ReductionOfResearchAndDevelopmentExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_RepaymentsOfLoanToParent" name="RepaymentsOfLoanToParent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_RepaymentsOnLoanToAffiliate" name="RepaymentsOnLoanToAffiliate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_RevenueRecognizedAmortizationPeriodTerm" name="RevenueRecognizedAmortizationPeriodTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_RevenueRecognizedPaymentTerms" name="RevenueRecognizedPaymentTerms" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_RevenueReserves" name="RevenueReserves" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_RevolvingLineOfCreditClosingDate" name="RevolvingLineOfCreditClosingDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_SalesConsultingServicesFee" name="SalesConsultingServicesFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="sitm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExerciseRestrictionPeriodAtTimeOfVesting" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExerciseRestrictionPeriodAtTimeOfVesting" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_TaxCreditCarryForwardExpirationYear" name="TaxCreditCarryForwardExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_ValuationAllowancesAndReservesAdditionsChargedToExpensesOrOtherAccounts" name="ValuationAllowancesAndReservesAdditionsChargedToExpensesOrOtherAccounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="sitm_ValuationAllowancesAndReservesDeductionsCreditedToExpensesOrOtherAccounts" name="ValuationAllowancesAndReservesDeductionsCreditedToExpensesOrOtherAccounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="sitm_LeaseDisclosureLineItems" name="LeaseDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_SignificantAccountingPoliciesLineItems" name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_AkiraTakataMember" name="AkiraTakataMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_CashRestrictedStockUnitAwardMember" name="CashRestrictedStockUnitAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_CorporateHeadquartersMember" name="CorporateHeadquartersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_CustomerFourMember" name="CustomerFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_CustomerOneMember" name="CustomerOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_CustomerThreeMember" name="CustomerThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_CustomerTwoMember" name="CustomerTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_DesignAndSimulationLicensesMember" name="DesignAndSimulationLicensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_DistributorConcentrationRiskMember" name="DistributorConcentrationRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_DistributorOneMember" name="DistributorOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_DistributorThreeMember" name="DistributorThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_DistributorTwoMember" name="DistributorTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_EquityAndLiabilityBasedAwardsMember" name="EquityAndLiabilityBasedAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_EquityAwardAndLiabilityBasedAwardsEquitySettledMember" name="EquityAwardAndLiabilityBasedAwardsEquitySettledMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_EquityAwardMember" name="EquityAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_FirstHalfOfTwentyTwentyOneGoalsMember" name="FirstHalfOfTwentyTwentyOneGoalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_FollowOnPublicOfferingMember" name="FollowOnPublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_InducementPlanMember" name="InducementPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_InternalUseSoftwareMember" name="InternalUseSoftwareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_LabAndManufacturingEquipmentMember" name="LabAndManufacturingEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_LeaseEquipmentMember" name="LeaseEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_LiabilityBasedAwardMember" name="LiabilityBasedAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_LiabilityBasedAwardsCashSettledMember" name="LiabilityBasedAwardsCashSettledMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_LiabilityBasedAwardsToBeSettledInEquityMember" name="LiabilityBasedAwardsToBeSettledInEquityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_MegaChipsMember" name="MegaChipsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_MegaChipsTaiwanCorporationMember" name="MegaChipsTaiwanCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_MichiganStateTaxAuthorityMember" name="MichiganStateTaxAuthorityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_MUFGMember" name="MUFGMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_NewHiresMember" name="NewHiresMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_NonRecurringEngineeringServicesMember" name="NonRecurringEngineeringServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_OfficeSpaceMember" name="OfficeSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_OnePointFourFivePercentageLoanMaturingJulyTwentyFourTwentyTwentyMember" name="OnePointFourFivePercentageLoanMaturingJulyTwentyFourTwentyTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_OnePointThreeNinePercentageLoanMaturingTwentyFourJuneTwentyTwentyMember" name="OnePointThreeNinePercentageLoanMaturingTwentyFourJuneTwentyTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_OtherCountriesMember" name="OtherCountriesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_PerformanceRestrictedStockUnitAwardMember" name="PerformanceRestrictedStockUnitAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_PurchasedIntangiblesMember" name="PurchasedIntangiblesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_RestrictedStockUnitAwardCashRestrictedStockUnitAwardAndPerformanceRestrictedStockUnitAwardMember" name="RestrictedStockUnitAwardCashRestrictedStockUnitAwardAndPerformanceRestrictedStockUnitAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_SecondHalfOfTwentyTwentyOneGoalsMember" name="SecondHalfOfTwentyTwentyOneGoalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_SiTimeCorporationMember" name="SiTimeCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_SMBCMember" name="SMBCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_ThreePointOneZeroPercentageLoanMaturingNineteenFebruaryTwentyTwentyMember" name="ThreePointOneZeroPercentageLoanMaturingNineteenFebruaryTwentyTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_ThreePointOneZeroZeroZeroZeroPercentageLoanMaturingOnNineteenthFebruaryTwoThousandAndTwentyMember" name="ThreePointOneZeroZeroZeroZeroPercentageLoanMaturingOnNineteenthFebruaryTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TimeBasedRestrictedStockAwardsMember" name="TimeBasedRestrictedStockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TwentyTwentyGoalsMember" name="TwentyTwentyGoalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TwoPointFourPercentageSixLoanMaturingSeptemberTwentyOneTwentyTwentyMember" name="TwoPointFourPercentageSixLoanMaturingSeptemberTwentyOneTwentyTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TwoPointNineSevenPercentageLoanMaturingTenJuneTwentyTwentyMember" name="TwoPointNineSevenPercentageLoanMaturingTenJuneTwentyTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TwoPointNineSevenZeroZeroZeroPercentageLoanMaturingOnTenthJuneTwoThousandAndTwentyMember" name="TwoPointNineSevenZeroZeroZeroPercentageLoanMaturingOnTenthJuneTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TwoPointThreeSevenPercentageLoanMaturingTwentyFourMarchTwentyTwentyOneMember" name="TwoPointThreeSevenPercentageLoanMaturingTwentyFourMarchTwentyTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_TwoThousandNineteenStockIncentivePlanMember" name="TwoThousandNineteenStockIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_OutbreakOfCoronavirusDiseaseTwentyNineteenPolicyTextBlock" name="OutbreakOfCoronavirusDiseaseTwentyNineteenPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_LeaseDisclosureTable" name="LeaseDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_SignificantAccountingPoliciesTable" name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="sitm_OperatingLeaseAssetsAndLiabilitiesTableTextBlock" name="OperatingLeaseAssetsAndLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_DefinedContributionPlanDisclosureTextBlock" name="DefinedContributionPlanDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_InitialAndFollowOnPublicOfferingsPolicyPolicyTextBlock" name="InitialAndFollowOnPublicOfferingsPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_LeasesOfLessorAndLesseeDisclosureTextBlock" name="LeasesOfLessorAndLesseeDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_NonRecurringEngineeringServicesPolicyTextBlock" name="NonRecurringEngineeringServicesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_PropertyPlantAndEquipmentUsefulLivesTableTextBlock" name="PropertyPlantAndEquipmentUsefulLivesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_ScheduleOfPropertyAndEquipmentAndIntangibleAssetsAttributableToOperationsTableTextBlock" name="ScheduleOfPropertyAndEquipmentAndIntangibleAssetsAttributableToOperationsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="sitm_StockSplitPolicyTextBlock" name="StockSplitPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
