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    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

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        <cik>0001114180</cik>
        <entityName>ESILICON CORP</entityName>
        <issuerAddress>
            <street1>501 MACARA AVENUE, SUITE 201</street1>
            <city>SUNNYVALE</city>
            <stateOrCountry>CA</stateOrCountry>
            <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
            <zipCode>94085</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(408) 616-4600</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
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            <value>None</value>
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        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

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            <relatedPersonName>
                <firstName>Fritz</firstName>
                <lastName>Koehler</lastName>
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                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
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            <relatedPersonName>
                <firstName>John</firstName>
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                <lastName>Harding</lastName>
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                <stateOrCountry>CA</stateOrCountry>
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                <zipCode>94085</zipCode>
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                <relationship>Director</relationship>
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            <relatedPersonName>
                <firstName>Warren</firstName>
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                <lastName>Ligan</lastName>
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                <firstName>Crawford</firstName>
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            <relatedPersonName>
                <firstName>Seth</firstName>
                <middleName>D.</middleName>
                <lastName>Neiman</lastName>
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                <firstName>Robert</firstName>
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                <firstName>R. David</firstName>
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                <lastName>Suarez</lastName>
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                <firstName>W. Blake</firstName>
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            <relatedPersonName>
                <firstName>John</firstName>
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                <lastName>Dickson</lastName>
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                <firstName>Willem</firstName>
                <middleName>P.</middleName>
                <lastName>Roelandts</lastName>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Patrick</firstName>
                <middleName>S.</middleName>
                <lastName>Soheili</lastName>
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                <street2>501 Macara Avenue, Suite 201</street2>
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            <relatedPersonName>
                <firstName>Hao</firstName>
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                <firstName>Lawrence</firstName>
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                <lastName>Conrad</lastName>
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                <firstName>Eugene II</firstName>
                <middleName>A.</middleName>
                <lastName>Skulick</lastName>
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    <offeringData>
        <industryGroup>
            <industryGroupType>Other Technology</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2012-08-10</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
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        <typesOfSecuritiesOffered>
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            <isOptionToAcquireType>true</isOptionToAcquireType>
            <isSecurityToBeAcquiredType>true</isSecurityToBeAcquiredType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>700000</totalOfferingAmount>
            <totalAmountSold>700000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse>Aggregate exercise price of the Warrants to Purchase Series F Preferred Stock issued to Gold Hill Capital 2008, LP and SVB Financial Group on August 10, 2012.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>2</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
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                <dollarAmount>0</dollarAmount>
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            <clarificationOfResponse></clarificationOfResponse>
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            <clarificationOfResponse></clarificationOfResponse>
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        <signatureBlock>
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            <signature>
                <issuerName>ESILICON CORP</issuerName>
                <signatureName>Fritz Koehler</signatureName>
                <nameOfSigner>Fritz Koehler</nameOfSigner>
                <signatureTitle>Vice President and Secretary</signatureTitle>
                <signatureDate>2012-08-22</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
