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News Release

Lattice Demonstrates Robust Interoperability at University of New Hampshire XAUI Plugfest

HILLSBORO, OR - AUGUST 7, 2003 - Lattice Semiconductor (NASDAQ:LSCC) today announced successful interoperability of its ORT82G5 Field Programmable System Chip (FPSC) with a variety of devices from other vendors. The tests were conducted at the recent XAUI PlugFest at the InterOperability Laboratory (IOL) of the University of New Hampshire's Research Computing Center. The ORT82G5 is the industry�s fastest programmable backplane transceiver, with 8 channels of SERDES each operating at up to 3.7Gbits/sec. It is targeted at XAUI- and Fibre Channel-based backplane applications. With industry- leading data rates, low jitter, low power and hundreds of thousands of programmable gates, the ORT82G5 backplane transceiver meets the high-performance and high-reliability demands of carrier-class 10 Gigabit Ethernet communications systems.

"Lattice is committed to UNH InterOperability Laboratory testing as it gives us a chance to demonstrate to customers the robustness and superior performance of our SERDES technology when compared to competitors and partners alike," commented Stan Kopec, vice president of marketing at Lattice Semiconductor. "The ORT82G5 is production-proven and has been deployed in a variety of customer systems. From that standpoint, this exercise is analogous to a major league baseball all-star attending a tryout - he�s already demonstrated his ability, but is always ready to show what he�s got. We invite anyone to hook up to our transceivers: seeing is believing. If a device meets the XAUI standard, then the ORT82G5 will interoperate with it," added Kopec.

Test Configuration and Results
The most recent interoperability tests at the UNH InterOperability Laboratory allowed Lattice to prove the superior performance of its sysHSI™ SERDES technology. The ORT82G5 devices were socketed on a paddle-board equipped with a Tyco HM-Zd connecter for easy interfacing to the Tyco Electronics XAUI HM-Zd Interoperability test platform. Packet Error Rate estimation tests were performed with multiple vendors. Under testing, the ORT82G5 devices successfully interoperated while sending a CJPAT sequence at a Bit Error Rate (BER) better than or equal to 10-12 with 95% confidence when connected across the Tyco backplane and associated trace. The total trace is comprised of line card trace length, any SMA cabling, any adapter line-card trace and the backplane itself.

"The Lattice ORT82G5 solution performed very well in XAUI interoperability tests with a variety of vendors," said Bob Noseworthy, 10 Gigabit Ethernet Consortium Manager at UNH IOL. "The Lattice testing is a great example of the value of the IOL, providing a non-partisan venue for the objective evaluation of programmables and ASSPs interoperating. This process demonstrates to potential users the real-world capabilities of a SERDES, unlike published specifications or simulations," Noseworthy added.

"As high-speed serial products are introduced into the market, the importance of interoperability testing continues to grow," stated John D'Ambrosia, manager of semiconductor relations for Tyco Electronics. "Lattice and Tyco Electronics share a common belief and commitment to demonstrate the practical interoperability of our products."

For customer-specific interoperability testing, Lattice has introduced its High-Speed SERDES Briefcase Evaluation Board, an interoperability and evaluation system for Lattice�s portfolio of high-speed backplane transceivers. The board comes equipped with a socketed ORT82G5 or ORSO82G5 FPSC, along with Lattice�s ispPAC� Power1208 in-system programmable (ISP™) Power Manager device and ispGDX2™-256 high-speed crosspoint switch device providing 16 full-duplex SERDES channels. The Evaluation Board includes on-board power supplies to support regulated 3.3V, 2.5V, 1.8V and 1.5V busses. The Power1208 provides complete power sequencing, monitoring and management. The board also features 24- and 40- inch FR-4 traces and an on-board 156MHz oscillator. Ample connectors are available to examine ORT82G5, ORSO82G5 or ispGDX2 SERDES outputs. The Board also comes with Lattice�s ORCAstra™ software tool which provides a convenient user interface to manage the real-time configuration of ORT82G5 and ORSO82G5 operational modes during evaluation and debug.

About UNH InterOperability Laboratory
The University of New Hampshire Research Computing Center's InterOperability Laboratory (IOL) is a world renowned, highly respected center of data communications technology research, testing, and education. The lab enjoys a reputation for expertise not only in testing and test procedure development, but also in the interpretation of technical specifications and resolution of conflicts within the specifications themselves and between different implementations. By bringing companies together as a consortium in a neutral environment and leveraging collective resources to develop a common test bed, test methodologies, and test tools, the IOL is able to provide a service that most companies couldn't afford to do in- house. For more information, visit www.iol.unh.edu.

About Lattice Semiconductor
Oregon-based Lattice Semiconductor Corporation designs, develops and markets the broadest range of Field Programmable Gate Arrays (FPGAs), Field Programmable System Chips (FPSCs) and high-performance ISP™ programmable logic devices (PLDs). Lattice offers total solutions for today�s system designs by delivering the most innovative programmable silicon products that embody leading-edge system expertise.

Lattice products are sold worldwide through an extensive network of independent sales representatives and distributors, primarily to OEM customers in the fields of communication, computing, computer peripherals, instrumentation, industrial controls and military systems. Company headquarters are located at 5555 NE Moore Court, Hillsboro, Oregon 97124 USA; Telephone 503-268-8000, FAX 503-268-8037. For more information on Lattice Semiconductor Corporation, access our World Wide Web site at http://www.latticesemi.com.

Statements in this news release looking forward in time are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that forward- looking statements involve risks and uncertainties including 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 and other risk factors detailed in the Company�s Securities and Exchange Commission filings. Actual results may differ materially from forward- looking statements.

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Lattice Semiconductor Corporation, Lattice (& design), L (& design), in-system programmable, ISP, ispGDX2, ispPAC, ORCAstra, sysHSI, and specific product designations are either registered trademarks or trademarks of Lattice Semiconductor Corporation or its subsidiaries in the United States and/or other countries.

GENERAL NOTICE: Other product names used in this publication are for identification purposes only and may be trademarks of their respective holders.

For more information contact:

Sean Hildenbrand, Public Relations
Lattice Semiconductor Corporation
sean.hildenbrand@latticesemi.com
(503) 268-8680