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  <xs:element id="mtsi_IncomeTaxesLineItems" abstract="true" name="IncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mtsi_DeferredTaxAssetSection174RDCostCapitalization" abstract="false" name="DeferredTaxAssetSection174RDCostCapitalization" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_EffectiveIncomeTaxRateReconciliationResearchAndDevelopmentCreditAndDomesticManufacturingDeduction" abstract="false" name="EffectiveIncomeTaxRateReconciliationResearchAndDevelopmentCreditAndDomesticManufacturingDeduction" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="mtsi_EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments" abstract="false" name="EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="mtsi_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsNet" abstract="false" name="DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_DeferredTaxAssetLeaseObligations" abstract="false" name="DeferredTaxAssetLeaseObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_DeferredTaxLiabilitiesDebtRestructuring" abstract="false" name="DeferredTaxLiabilitiesDebtRestructuring" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_DeferredTaxLiabilityRightOfUseAsset" abstract="false" name="DeferredTaxLiabilityRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_IncentiveStockUnitsMember" abstract="true" name="IncentiveStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_RestrictedStockandRestrictedStockUnitsRSUsMember" abstract="true" name="RestrictedStockandRestrictedStockUnitsRSUsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_PerformanceBasedRestrictedStockUnitAwardsMember" abstract="true" name="PerformanceBasedRestrictedStockUnitAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_PerformanceBasedRestrictedStockUnitsMember" abstract="true" name="PerformanceBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_MarketBasedPerformanceRestrictedStockUnitsMember" abstract="true" name="MarketBasedPerformanceRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_PerformanceBasedEmployeeStockOptionsMember" abstract="true" name="PerformanceBasedEmployeeStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_NumberOfIncentivePlan" abstract="false" name="NumberOfIncentivePlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="mtsi_PayrollDeductionsMaximumAsPercentageOfEligibleCompensation" abstract="false" name="PayrollDeductionsMaximumAsPercentageOfEligibleCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="mtsi_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofTranches" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofTranches" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="mtsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarningPercentageOfTargetedShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEarningPercentageOfTargetedShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="mtsi_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsNumberOfShares" abstract="false" name="SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsNumberOfShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="mtsi_ExercisePriceRate" abstract="false" name="ExercisePriceRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mtsi_TargetStockPriceTerm" abstract="false" name="TargetStockPriceTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="mtsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceBasedAdjustmentInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceBasedAdjustmentInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="mtsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceBasedAdjustmentInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceBasedAdjustmentInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="mtsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateSharePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateSharePrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageSharePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageSharePrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_NumberOfCommonSharesDesignatedAsForfeitable" abstract="false" name="NumberOfCommonSharesDesignatedAsForfeitable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="mtsi_SaleOfCommercialProductsMember" abstract="true" name="SaleOfCommercialProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mtsi_PurchaseOfMachineryAndEquipmentMember" abstract="true" name="PurchaseOfMachineryAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mtsi_NonCashPurchaseOfSoftware" abstract="false" name="NonCashPurchaseOfSoftware" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mtsi_TopTenCustomersMember" abstract="true" name="TopTenCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_NumberOfMajorCustomers" abstract="false" name="NumberOfMajorCustomers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="mtsi_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="mtsi_StephenDalyMember" abstract="true" name="StephenDalyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mtsi_JohnKoberMember" abstract="true" name="JohnKoberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
