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  <xsd:element abstract="true" id="lscc_AmortizationOfAcquiredIntangibleAssetsMember" name="AmortizationOfAcquiredIntangibleAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_AmortizationOfIntangibleAssetsAcquired" name="AmortizationOfIntangibleAssetsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_AwardsGrantedIn2022And2021Member" name="AwardsGrantedIn2022And2021Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_AwardsVestedOrExercisedMember" name="AwardsVestedOrExercisedMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_AwardsWithMarketConditionOrPerformanceConditionMember" name="AwardsWithMarketConditionOrPerformanceConditionMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_BasisOfAccountingAndUseOfEstimatesPolicyPolicyTextBlock" name="BasisOfAccountingAndUseOfEstimatesPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_CashTaxesPaidTableTextBlock" name="CashTaxesPaidTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_ContractWithCustomerAssetRevenueRecordedDuringPeriod" name="ContractWithCustomerAssetRevenueRecordedDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_ContractWithCustomerLiabilityAccruedForEstimatedFutureStockRotationAndScrapReturns" name="ContractWithCustomerLiabilityAccruedForEstimatedFutureStockRotationAndScrapReturns" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_ContractWithCustomerLiabilityReleaseOfAccrualsForRecognizedStockRotationAndScrapReturns" name="ContractWithCustomerLiabilityReleaseOfAccrualsForRecognizedStockRotationAndScrapReturns" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_CorporateVicePresidentAndChiefAccountingOfficerMember" name="CorporateVicePresidentAndChiefAccountingOfficerMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_DeferredTaxAssetLeaseLiability" name="DeferredTaxAssetLeaseLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="lscc_DeferredTaxLiabilityRightofuseAsset" name="DeferredTaxLiabilityRightofuseAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="lscc_DepreciationDepletionAndAmortizationExcludingRightOfUseAssetAndFinanceCosts" name="DepreciationDepletionAndAmortizationExcludingRightOfUseAssetAndFinanceCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_DistributorAMember" name="DistributorAMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_DistributorBMember" name="DistributorBMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_DistributorCMember" name="DistributorCMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_DistributorDMember" name="DistributorDMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_DistributorsMember" name="DistributorsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsPercent" name="EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationChangesInUnrecognizedTaxBenefitsAmount" name="EffectiveIncomeTaxRateReconciliationChangesInUnrecognizedTaxBenefitsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationSubpartFIncomeAmount" name="EffectiveIncomeTaxRateReconciliationSubpartFIncomeAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationSubpartFIncomePercent" name="EffectiveIncomeTaxRateReconciliationSubpartFIncomePercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationTaxCreditsFederalPercent" name="EffectiveIncomeTaxRateReconciliationTaxCreditsFederalPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationUsTaxOnForeignOperationsPercent" name="EffectiveIncomeTaxRateReconciliationUsTaxOnForeignOperationsPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationWithholdingTaxAmount" name="EffectiveIncomeTaxRateReconciliationWithholdingTaxAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_EffectiveIncomeTaxRateReconciliationWithholdingTaxPercent" name="EffectiveIncomeTaxRateReconciliationWithholdingTaxPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_ExistingTechnologyMember" name="ExistingTechnologyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_ForeignCountriesMember" name="ForeignCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_LaborAndRelatedExpenseIncentiveCompensation" name="LaborAndRelatedExpenseIncentiveCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_LeaseTerminationAndFixedAssetsMember" name="LeaseTerminationAndFixedAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_LesseeOperatingLeaseOptionToExtendPeriod" name="LesseeOperatingLeaseOptionToExtendPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_LesseeOperatingLeaseOptionToTerminatePeriod" name="LesseeOperatingLeaseOptionToTerminatePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_LesseeOperatingLeaseRightofUseAssetsAndLiabilitiesTableTextBlock" name="LesseeOperatingLeaseRightofUseAssetsAndLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_LiabilityForNoncancelableContractsCurrent" name="LiabilityForNoncancelableContractsCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="lscc_LiabilityForNoncancelableContractsNoncurrent" name="LiabilityForNoncancelableContractsNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="lscc_LicensedTechnologyMember" name="LicensedTechnologyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_MasksMember" name="MasksMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_OperatingLeaseLiabilitiesAdjustmentsForPresentValueForeignCurrencyAndRestructuringLiabilityEffects" name="OperatingLeaseLiabilitiesAdjustmentsForPresentValueForeignCurrencyAndRestructuringLiabilityEffects" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_OperatingLeaseLiabilityAdditions" name="OperatingLeaseLiabilityAdditions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_OperatingLeaseLiabilityIncreaseFromAdoptionOfAsc" name="OperatingLeaseLiabilityIncreaseFromAdoptionOfAsc" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_OperatingLeaseRightofuseAssetAdjustmentsForPresentValueAndForeignCurrencyEffects" name="OperatingLeaseRightofuseAssetAdjustmentsForPresentValueAndForeignCurrencyEffects" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_OtherAsiaMember" name="OtherAsiaMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_OtherCountriesMember" name="OtherCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_OtherMember" name="OtherMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_OtherStatesMember" name="OtherStatesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_PercentageOfRevenue" name="PercentageOfRevenue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_PolicyTable" name="PolicyTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_ProductionEquipmentAndSoftwareMember" name="ProductionEquipmentAndSoftwareMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_Q32023PlanMember" name="Q32023PlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_Q32024Plan1Member" name="Q32024Plan1Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_RepurchaseProgram2025Member" name="RepurchaseProgram2025Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_RepurchaseProgram2026Member" name="RepurchaseProgram2026Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_RestructuringChargesAndOtherMiscellaneousCosts" name="RestructuringChargesAndOtherMiscellaneousCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_RightofuseAssetsObtainedForNewAndModifiedLeaseContractsDuringThePeriod" name="RightofuseAssetsObtainedForNewAndModifiedLeaseContractsDuringThePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_ScheduleOfSharebasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" name="ScheduleOfSharebasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_ScheduleOfSharebasedPaymentAwardStockOptionsAndEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" name="ScheduleOfSharebasedPaymentAwardStockOptionsAndEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_SeniorVicePresidentAndChiefStrategyAndMarketingOfficerMember" name="SeniorVicePresidentAndChiefStrategyAndMarketingOfficerMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedEffectOfVestingMultiplier" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedEffectOfVestingMultiplier" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageBasedOnMarketConditions" name="SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageBasedOnMarketConditions" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageBasedOnMarketConditionsExceeded" name="SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageBasedOnMarketConditionsExceeded" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageBasedOnSockPriceAppreciation" name="SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageBasedOnSockPriceAppreciation" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageOfMarketConditionAchieved" name="SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageOfMarketConditionAchieved" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumAnnualContributionPerEmployeePercent" name="SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumAnnualContributionPerEmployeePercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedGrantsInPeriodGross" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedGrantsInPeriodGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedNumberOfShares" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedNumberOfShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedOptionsForfeitedNumberOfShares" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonOptionEquityInstrumentsNonvestedOptionsForfeitedNumberOfShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsForfeituresWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsForfeituresWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsNonvestedGrantsInPeriodWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsNonvestedGrantsInPeriodWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsNonvestedOptionsVestedWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsNonvestedOptionsVestedWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsNonvestedWeightedAverageGrantDateFairValueEndingBalance" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsNonvestedWeightedAverageGrantDateFairValueEndingBalance" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsVestedInPeriodNumberOfShares" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndNonoptionEquityInstrumentsVestedInPeriodNumberOfShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageAwardVestingRights" name="SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageAwardVestingRights" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedPaymentArrangementBenefitFromForfeitures" name="SharebasedPaymentArrangementBenefitFromForfeitures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="lscc_SharebasedPaymentArrangementExerciseAndVestingOfAwardsTaxBenefit" name="SharebasedPaymentArrangementExerciseAndVestingOfAwardsTaxBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_TermSecuredOvernightFinancingRateMember" name="TermSecuredOvernightFinancingRateMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_The2012ESPPMember" name="The2012ESPPMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_The2022CreditAgreementMember" name="The2022CreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_The2023EquityIncentivePlanAndThe2011NonemployeeDirectorEquityIncentivePlanMember" name="The2023EquityIncentivePlanAndThe2011NonemployeeDirectorEquityIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_The2025InducementEquityPlanMember" name="The2025InducementEquityPlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_TsrRelativeToPhlxSemiconductorSectorIndex75thPercentileMember" name="TsrRelativeToPhlxSemiconductorSectorIndex75thPercentileMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-1-basis-of-presentation-and-significant-accounting-policies-concentration-of-risk-by-risk-details" name="statement-statement-note-1-basis-of-presentation-and-significant-accounting-policies-concentration-of-risk-by-risk-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-1-basis-of-presentation-and-significant-accounting-policies-tables" name="statement-statement-note-1-basis-of-presentation-and-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-10-stockbased-compensation-plans-assumptions-used-at-grant-date-in-the-valuation-of-russ-details" name="statement-statement-note-10-stockbased-compensation-plans-assumptions-used-at-grant-date-in-the-valuation-of-russ-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-10-stockbased-compensation-plans-schedule-of-nonvested-restricted-stock-units-activity-details" name="statement-statement-note-10-stockbased-compensation-plans-schedule-of-nonvested-restricted-stock-units-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-10-stockbased-compensation-plans-share-based-compensation-performance-shares-award-market-condition-or-performance-condition-details" name="statement-statement-note-10-stockbased-compensation-plans-share-based-compensation-performance-shares-award-market-condition-or-performance-condition-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-10-stockbased-compensation-plans-sharebased-payment-award-stock-options-valuation-assumptions-details" name="statement-statement-note-10-stockbased-compensation-plans-sharebased-payment-award-stock-options-valuation-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-10-stockbased-compensation-plans-stockbased-compensation-details" name="statement-statement-note-10-stockbased-compensation-plans-stockbased-compensation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-10-stockbased-compensation-plans-tables" name="statement-statement-note-10-stockbased-compensation-plans-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-cash-taxes-paid-details" name="statement-statement-note-12-income-taxes-cash-taxes-paid-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-components-of-income-tax-expense-benefit-details" name="statement-statement-note-12-income-taxes-components-of-income-tax-expense-benefit-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-deferred-tax-assets-and-liabilities-details" name="statement-statement-note-12-income-taxes-deferred-tax-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-effective-income-tax-rate-reconciliation-details" name="statement-statement-note-12-income-taxes-effective-income-tax-rate-reconciliation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-income-before-income-tax-domestic-and-foreign-details" name="statement-statement-note-12-income-taxes-income-before-income-tax-domestic-and-foreign-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-tables" name="statement-statement-note-12-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-unrecognized-tax-benefits-excluding-amounts-pertaining-to-examined-tax-returns-roll-forward-details" name="statement-statement-note-12-income-taxes-unrecognized-tax-benefits-excluding-amounts-pertaining-to-examined-tax-returns-roll-forward-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-12-income-taxes-valuation-allowance-details" name="statement-statement-note-12-income-taxes-valuation-allowance-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-15-segment-reporting-segment-reporting-details" name="statement-statement-note-15-segment-reporting-segment-reporting-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-15-segment-reporting-tables" name="statement-statement-note-15-segment-reporting-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-2-net-income-per-share-earnings-per-share-details" name="statement-statement-note-2-net-income-per-share-earnings-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-2-net-income-per-share-tables" name="statement-statement-note-2-net-income-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-3-revenue-from-contracts-with-customers-contract-balance-details" name="statement-statement-note-3-revenue-from-contracts-with-customers-contract-balance-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-3-revenue-from-contracts-with-customers-disaggregation-of-revenue-details" name="statement-statement-note-3-revenue-from-contracts-with-customers-disaggregation-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-3-revenue-from-contracts-with-customers-tables" name="statement-statement-note-3-revenue-from-contracts-with-customers-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-4-balance-sheet-components-accounts-receivable-details" name="statement-statement-note-4-balance-sheet-components-accounts-receivable-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-4-balance-sheet-components-accrued-liabilities-details" name="statement-statement-note-4-balance-sheet-components-accrued-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-4-balance-sheet-components-accrued-liabilities-details-parentheticals" name="statement-statement-note-4-balance-sheet-components-accrued-liabilities-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-4-balance-sheet-components-inventories-details" name="statement-statement-note-4-balance-sheet-components-inventories-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-4-balance-sheet-components-other-longterm-liabilities-details" name="statement-statement-note-4-balance-sheet-components-other-longterm-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-4-balance-sheet-components-tables" name="statement-statement-note-4-balance-sheet-components-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-5-property-and-equipment-property-plant-and-equipment-details" name="statement-statement-note-5-property-and-equipment-property-plant-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-5-property-and-equipment-tables" name="statement-statement-note-5-property-and-equipment-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-6-intangible-assets-and-goodwill-amortization-expense-details" name="statement-statement-note-6-intangible-assets-and-goodwill-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-6-intangible-assets-and-goodwill-finite-lived-intangible-assets-details" name="statement-statement-note-6-intangible-assets-and-goodwill-finite-lived-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-6-intangible-assets-and-goodwill-finite-lived-intangible-assets-future-amortization-expense-details" name="statement-statement-note-6-intangible-assets-and-goodwill-finite-lived-intangible-assets-future-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-6-intangible-assets-and-goodwill-tables" name="statement-statement-note-6-intangible-assets-and-goodwill-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-7-longterm-debt-interest-expense-details" name="statement-statement-note-7-longterm-debt-interest-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-7-longterm-debt-tables" name="statement-statement-note-7-longterm-debt-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-8-restructuring-activity-related-to-restructuring-plans-details" name="statement-statement-note-8-restructuring-activity-related-to-restructuring-plans-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-8-restructuring-activity-related-to-restructuring-plans-details-parentheticals" name="statement-statement-note-8-restructuring-activity-related-to-restructuring-plans-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-8-restructuring-tables" name="statement-statement-note-8-restructuring-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-9-leases-lease-balance-classifications-within-the-consolidated-balance-sheets-and-lease-activity-details" name="statement-statement-note-9-leases-lease-balance-classifications-within-the-consolidated-balance-sheets-and-lease-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-9-leases-maturities-of-operating-lease-liabilities-details" name="statement-statement-note-9-leases-maturities-of-operating-lease-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-note-9-leases-tables" name="statement-statement-note-9-leases-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="lscc_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>