<SEC-DOCUMENT>0001209191-15-009074.txt : 20150203
<SEC-HEADER>0001209191-15-009074.hdr.sgml : 20150203
<ACCEPTANCE-DATETIME>20150203181809
ACCESSION NUMBER:		0001209191-15-009074
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150130
FILED AS OF DATE:		20150203
DATE AS OF CHANGE:		20150203

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNAPTICS INC
		CENTRAL INDEX KEY:			0000817720
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		IRS NUMBER:				770118518
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0626

	BUSINESS ADDRESS:	
		STREET 1:		3120 SCOTT BLVD.
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054
		BUSINESS PHONE:		408-454-5100

	MAIL ADDRESS:	
		STREET 1:		3120 SCOTT BLVD.
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McFarland John
		CENTRAL INDEX KEY:			0001486742

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49602
		FILM NUMBER:		15572752

	MAIL ADDRESS:	
		STREET 1:		C/O MAGNACHIP SEMICONDUCTOR, INC.
		STREET 2:		20400 STEVENS CREEK BOULEVARD, SUITE 370
		CITY:			CUPERTINO
		STATE:			CA
		ZIP:			95014
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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    <schemaVersion>X0306</schemaVersion>

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    <periodOfReport>2015-01-30</periodOfReport>

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    <issuer>
        <issuerCik>0000817720</issuerCik>
        <issuerName>SYNAPTICS INC</issuerName>
        <issuerTradingSymbol>SYNA</issuerTradingSymbol>
    </issuer>

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        <reportingOwnerId>
            <rptOwnerCik>0001486742</rptOwnerCik>
            <rptOwnerName>McFarland John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1251 MCKAY DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN JOSE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95131</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, General Counsel &amp; Sec.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-02-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionCode>M</transactionCode>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3880</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>46.08</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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                <transactionPricePerShare>
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                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9979</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
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            <transactionAmounts>
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                    <footnoteId id="F2"/>
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                <transactionPricePerShare>
                    <value>77.88</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                <sharesOwnedFollowingTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>76.81</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2015-01-30</value>
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            <deemedExecutionDate></deemedExecutionDate>
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                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2022-01-30</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>3000</value>
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        <derivativeTransaction>
            <securityTitle>
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                <value>46.08</value>
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                <value>2015-02-02</value>
            </transactionDate>
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                <transactionCode>M</transactionCode>
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                <value></value>
            </transactionTimeliness>
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                <transactionShares>
                    <value>3880</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
                <value>2020-11-04</value>
            </expirationDate>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>3880</value>
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            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6120</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">The shares were sold pursuant to a 10b5-1 Sales Plan dated August 15, 2014, as amended on November 12, 2014.</footnote>
        <footnote id="F2">Represents shares of common stock withheld by the Issuer to satisfy certain tax withholding obligations associated with the vesting of deferred stock units.</footnote>
        <footnote id="F3">1/12th of the total number of shares subject to the option shall vest and become exercisable each quarter following the January 30, 2015 date of grant, until fully vested on January 30, 2018.</footnote>
        <footnote id="F4">One-third of the total number of shares subject to the option vested and became exercisable on November 4, 2014, and 1/36th of the total number of shares subject to the option vested or shall vest and became or shall become exercisable on the 4th day of each month thereafter until fully vested on November 4, 2016.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Kermit Nolan, as attorney-in-fact</signatureName>
        <signatureDate>2015-02-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
