Lattice Announces Immediate Availability of Mentor Graphics® Precision® RTL Synthesis

- Downloadable for Immediate Customer Use, Precision RTL Synthesis Supports All Lattice Digital Devices, Including LatticeECP-DSP and LatticeEC FPGAs -

HILLSBORO, OR - JANUARY 24, 2005 - Lattice Semiconductor Corporation (NASDAQ: LSCC) today announced the immediate availability of the Mentor Graphics Precision RTL synthesis tool for customer use. Precision RTL synthesis was added to the Lattice ispLEVER design tool suite as part of a multi-year contract extension announced in October 2004. Full support for all Lattice digital programmable logic devices, including the new LatticeECP-DSP" and LatticeEC" FPGA families, is included in this product release. Lattice also continues to offer a wide range of leading synthesis and simulation tools with ispLEVER, including Mentor Graphics LeonardoSpectrum" synthesis and the ModelSim simulator. "Lattice is pleased to announce the availability of Precision RTL synthesis for customer use," said Stan Kopec, Lattice vice president of corporate marketing. "The Precision RTL tool will provide our users with outstanding functionality and higher performance in synthesis, especially for our new, leading edge FPGA families," Kopec concluded.

Improved Performance and New, Advanced Design Capabilities
The Precision RTL synthesis tool is optimized to deliver superior synthesis results quickly and easily. In addition, Precision RTL provides a breadth of advanced design creation and design analysis capabilities, including a full-featured, ASIC-strength static timing analysis tool and intuitive design project management.

Precision RTL synthesis will be fully integrated into the ispLEVER 5.0 Project Navigator, scheduled for 2Q05. Currently, users may run Precision RTL in a stand-alone mode and create an EDIF (Electronic Data Interchange Format) project in the ispLEVER design environment. Precision RTL synthesis will replace Mentor Graphics LeonardoSpectrum synthesis tools in the ispLEVER design flow in 2005. Users of ispLEVER design tools with active maintenance agreements will be notified of the transition details at the appropriate time. Maintenance for the ispLEVER design tools may be purchased through the Lattice Semiconductor Corporation web site at http://www.latticesemi.com/store/software.cfm.

Availability and pricing
The Precision RTL synthesis tool is available now. Lattice ispLEVER design tools users with active maintenance agreements can download the Precision RTL synthesis tool free of charge from the Lattice web site.

About LatticeECP/EC FPGAs
The LatticeECP-DSP and LatticeEC FPGA device families are architected to provide the most optimized feature sets combined with the lowest total solution costs of any FPGAs. The new LatticeECP-DSP products, targeted for high-performance DSP applications, provide up to a 50% performance and 75% logic utilization improvement over other low-cost solutions when implementing common DSP functions. The LatticeEC FPGA product family, targeted for general-purpose FPGA applications, is a precise and targeted response to the market's explosive demand for low-cost, architecturally streamlined logic solutions. Through advanced 130nm silicon technology, an optimized architecture and proprietary circuit design, the new Lattice devices lower total solution costs by up to 30% to 50% compared with existing FPGA solutions, and are expected to broaden the adoption of FPGAs within the $20 billion ASIC marketplace.

About Lattice Semiconductor
Lattice Semiconductor Corporation designs, develops and markets the broadest range of Field Programmable Gate Arrays (FPGA), Field Programmable System Chips (FPSC) and high-performance Programmable Logic Devices (PLD), including Complex Programmable Logic Devices (CPLD), Programmable Mixed-Signal Products (ispPAC), and Programmable Digital Interconnect Devices (ispGDX). Lattice also offers industry leading SERDES products. Lattice is 'Bringing the Best Together' with comprehensive solutions for today's system designs, delivering 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 communications, computing, consumer, industrial and military systems. Company headquarters are located at 5555 NE Moore Court, Hillsboro, Oregon 97124-6421, USA; telephone 503-268-8000, fax 503-268-8037. For more information about Lattice Semiconductor Corporation, visit 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 third party software 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.

Lattice Semiconductor Corporation, Lattice (& design), L (& design), ispGDX, ispPAC 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.

Mentor Graphics, Precision, LeonardoSpectrum, ModelSim, and specific product designations are either registered trademarks or trademarks of Mentor Graphics 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:

Brian Kiernan, Corporate Communications Manager
Lattice Semiconductor Corporation
brian.kiernan@latticesemi.com
voice: (503) 268-8739
fax: (503) 268-8193