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                                                                     EXHIBIT 5.1





                                 April 29, 1997


Integrated Silicon Solution, Inc.
2231 Lawson Lane
Santa Clara, CA 95054

         RE:     REGISTRATION STATEMENT ON FORM S-8

Ladies and Gentlemen:

         We have examined the Registration Statement on Form S-8 to be filed by
you with the Securities and Exchange Commission on or about April 29, 1997 (the
"Registration Statement") in connection with the registration under the
Securities Act of 1933, as amended (the "Act"), of 300,000 shares of your
Common Stock issuable under your Nonstatutory Stock Plan.  Such shares of
Common Stock are referred to herein as the "Shares" and the Nonstatutory Stock
Plan is referred to herein as the "Plan".  As your counsel in connection with
this transaction, we have examined the proceedings taken and are familiar with
the proceedings proposed to be taken by you in connection with the issuance and
sale of the Shares pursuant to the Plan.

         It is our opinion that, upon completion of the actions being taken, or
contemplated by us as your counsel to be taken by you prior to the issuance of
the Shares pursuant to the Registration Statement and the Plan and upon
completion of the actions being taken in order to permit such transactions to
be carried out in accordance with the securities laws of the various states
where required, the Shares will be legally and validly issued, fully-paid and
non-assessable.

         We consent to the use of this opinion as an exhibit to the
Registration Statement, and further consent to the use of our name wherever
appearing in the Registration Statement and any amendments thereto.

                                       Very truly yours,

                                       /s/ WILSON SONSINI GOODRICH & ROSATI
                                       
                                       WILSON SONSINI GOODRICH & ROSATI
                                       Professional Corporation