EXHIBIT 5.1

October 1, 1999
Cirrus Logic, Inc.
3100 West Warren Avenue
Fremont, California 94538

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
September 30, 1999 (the "Registration Statement"), in connection with
the registration under the Securities Act of 1933, as amended, of 39,753
shares of your Common Stock (the "Shares") reserved for issuance under
the AudioLogic, Inc. 1992 Stock Option Plan (the "Plan").  As your legal
counsel, we have examined the proceedings taken and proposed to be taken
in connection with the issuance and sale of the Shares under the Plan.
It is our opinion that, when issued and sold in compliance with
applicable prospectus delivery requirements and in the manner referred
to in the Plan and pursuant to the agreements which accompany each
option grant under the Plan, 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 amendment
thereto.

                    Very truly yours,

                    /s/WILSON SONSINI GOODRICH & ROSATI
                    Professional Corporation