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<link:definition>999021 - Disclosure - Intangible Assets (Tables)</link:definition>
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<link:definition>999024 - Disclosure - Fair Value Measurements (Tables)</link:definition>
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<link:definition>999026 - Disclosure - Geographic and Other Information (Tables)</link:definition>
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<link:definition>999028 - Disclosure - Loss Per Share (Tables)</link:definition>
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<link:definition>999030 - Disclosure - Inventories - Changes in Inventory Reserve (Detail)</link:definition>
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<link:definition>999044 - Disclosure - Accrued Severance Benefits - Changes in Accrued Severance Benefits (Detail)</link:definition>
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<link:definition>999045 - Disclosure - Accrued Severance Benefits - Future Benefits Payments to Employees (Detail)</link:definition>
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<link:definition>999048 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
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<element name="PowerAnalogSolutionsBusinessMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_PowerAnalogSolutionsBusinessMember" substitutionGroup="xbrli:item" />
<element name="MixedSignalSolutionsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_MixedSignalSolutionsMember" substitutionGroup="xbrli:item" />
<element name="PowerAnalogSolutionsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_PowerAnalogSolutionsMember" substitutionGroup="xbrli:item" />
<element name="OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationsAndTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="mx_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationsAndTax" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="NewStockRepurchaseProgramMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_NewStockRepurchaseProgramMember" substitutionGroup="xbrli:item" />
<element name="StockAlreadyRepurchaseProgramMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_StockAlreadyRepurchaseProgramMember" substitutionGroup="xbrli:item" />
<element name="StockRepurchaseProgramMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_StockRepurchaseProgramMember" substitutionGroup="xbrli:item" />
<element name="EmployeeAndNonEmployeeStockOptionMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_EmployeeAndNonEmployeeStockOptionMember" substitutionGroup="xbrli:item" />
<element name="InsiderTradingArrangementsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="mx_InsiderTradingArrangementsAbstract" substitutionGroup="xbrli:item" />
</schema>
