Lattice Semiconductor Announces Two-For-One Stock Split

HILLSBORO, Ore. - August 11, 1999 -Lattice Semiconductor Corporation (NASDAQ: LSCC) today announced that its Board of Directors has approved a two-for-one split of its common stock to be effected in the form of a stock dividend of one share of common stock for each share of the Company's outstanding common stock.

The stock dividend will be payable on September 16, 1999 to stockholders of record as of August 26, 1999. A cash payment will be made in lieu of issuing any fractional shares. The stock split will increase the number of shares outstanding from approximately 24 million to approximately 48 million.

"This stock split should benefit our stockholders and the Company by broadening our stockholder base and improving the liquidity of the market for our stock," stated Cyrus Y. Tsui, president and chief executive officer.

The foregoing paragraphs contain forward-looking statements within the meaning of the Federal Securities laws including statements about future quarterly financial results, revenues, customers, product offerings and our ability to compete. Investors are cautioned that actual events and results could differ materially from these statements as a result of a number of factors, including overall semiconductor market conditions, market acceptance and demand for our new products, our dependencies on our silicon wafer suppliers, the impact of competitive products and pricing, technological and product development risks, potential SEC review of our accounting treatment of the Vantis acquisition as well as our ability to successfully integrate Vantis into our operations, retain key employees of Vantis, retain key customers and suppliers and successfully increase our combined revenue and profitability.

Oregon-based Lattice Semiconductor Corporation designs, develops and markets the broadest range of high-performance ISP^TM programmable logic devices (PLDs). Lattice introduced ISP devices to the industry in 1992. Lattice acquired Vantis, the Corporation that invented the PLD, in June 1999. With double the engineering and sales resources, the combined Company will focus on developing and delivering innovative programmable products to a complementary customer base.

Lattice/Vantis products are sold worldwide through an extensive network of independent sales representatives and distributors, primarily to OEM customers in the communication, computing, industrial and military end markets. Company headquarters are located at 5555 N.E. Moore Court, Hillsboro, Oregon 97124 U.S.A.; Telephone (503) 268-8000; FAX (503) 268-8037. For more information access our web sites at: www.latticesemi.com and www.vantis.com.

ISP and in-system programmable are trademarks of Lattice Semiconductor Corporation

For more information contact:

Rodney Sloss
Vice President, Finance
Lattice Semiconductor Corporation
(503) 268-8000