POWER OF ATTORNEY

The undersigned, as a Section 16 reporting person of Lattice Semiconductor
Corporation (the "Company"), hereby constitutes and appoints Cyrus Y.
Tsui, Stephen A. Skaggs, Rodney F. Sloss and Martin R. Baker, and each of
them, the undersigned's true and lawful attorney-in-fact to:

1. complete and execute Forms 3, 4 and 5 and other forms and all amendments
thereto as such attorney-in-fact shall in his or her discretion determine
to be required or advisable pursuant to Section 16 of the Securities and
Exchange Act of 1934 (as amended) and the rules and regulations promulgated
thereunder, or any successor laws and regulations, as a consequence of the
undersigned's ownership, acquisition or disposition of securities of the
Company; and

2. do all acts necessary in order to file such forms with the Securities
and Exchange Commission, any securities exchange or national association,
the Company and such other person or agency as the attorney-in-fact shall
deem appropriate.

The undersigned hereby ratifies and confirms all that said attorneys-in-fact
and agents shall do or cause to be done by virtue hereof.  The undersigned
acknowledges that the foregoing attorneys-in-fact, in serving in such
capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934 (as amended).

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect
to the undersigned's holdings of and transactions in securities issued by
the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the Company and the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 7th day of February, 2003.

Signature:
/s/ Larry W. Sonsini