SYNPLICITY ANNOUNCES IMPROVED PERFORMANCE FOR LATTICE FPGAs

Expansion of OEM and Development Agreement Designed to Produce Superior Results

HILLSBORO, OR and SUNNYVALE, Calif., NOVEMBER 29, 2005 — Lattice Semiconductor Corporation (NASDAQ: LSCC), a leading supplier of in- system programmable logic devices, and Synplicity Inc. (Nasdaq: SYNP), a leading supplier of software for the design and verification of semiconductors, today announced that the 8.4 version of Synplicity's Synplify Pro® product will provide additional performance enhancing features for Lattice Semiconductor's FPGA devices. Designers utilizing the Synplify Pro 8.4 software along with Lattice Semiconductor's FPGAs can expect to achieve up to a 20 percent performance improvement and significant area savings compared to competitive solutions. These improvements are the result of an ongoing strategic relationship between Lattice and Synplicity that ensures their mutual customers are provided with the best performance and time-to-market benefits.

"Our long-standing and close working relationship with Lattice Semiconductor allows us to provide best-in-class support for all of Lattice’s newest FPGA device families," said Jeff Garrison, director of FPGA products at Synplicity. "Our 8.4 release of Synplify Pro software adds many new performance-enhancing features like pipelining, re-timing, automatic RAM inferencing and inferring sequential shift operations in the RTL for implementation in RAM that result in substantial performance improvements for Lattice FPGAs."

"Performance improvement translates into more effective timing closure and lower cost solutions for our FPGA customers," said Tim Schnettler, director of Design Tools Marketing at Lattice Semiconductor. "Synplicity is an industry leading provider of FPGA software and we believe our strengthened partnership will be a source of continual innovation and improvement for years to come."

Joint Lattice Semiconductor and Synplicity Seminar Series
Over the next two quarters, Lattice Semiconductor and Synplicity plan to hold a seminar series detailing the performance benefits that can be achieved by using Synplicity's synthesis products with Lattice Semiconductor's FPGAs and CPLDs. The seminar series will include a technical discussion about the newest generation of Lattice FPGAs and ispLEVER® design tools, and techniques for using Synplicity's Synplify Pro software to boost design performance. The seminar series will be held in cities throughout the United States through the rest of this year, and in multiple cities in Europe and Asia in early 2006. For more information about the seminar series, including seminar locations and dates, visit http://www.synplicity.com or http://www.latticesemi.com/corporate/events/performanceadvantagessemi/index.cfm, or contact local Lattice Semiconductor or Synplicity representatives.

Pricing and Availability
Contact your local Synplicity office for pricing and availability information. Lattice customers who wish to upgrade their current Synplify tool to the new Synplify Pro product should contact their local Synplicity sales representative to see if they are eligible for a special offer.

About Synplicity
Synplicity® Inc. (Nasdaq: SYNP) is a leading supplier of innovative software solutions that enable the rapid and effective design of complex, high-performance semiconductors. Synplicity's tools provide outstanding performance, cost and time-to-market benefits by simplifying, improving and automating key design planning, logic synthesis, physical synthesis and verification functions for FPGA, DSP, ASIC prototyping, structured/platform ASIC and cell-based ASIC designers. Synplicity is the first company to deliver customized physical synthesis, analysis and floorplanning solutions for today's leading structured/platform ASICs. In addition, the company is the number one supplier of FPGA synthesis solutions and has been rated #1 in customer satisfaction in 2004 and 2005 in EE Times' Annual FPGA Customer Survey. Synplicity's products support industry-standard design languages (VHDL and Verilog) and run on popular platforms. The company employs over 300 people in over 20 facilities worldwide and is headquartered in Sunnyvale, California. For more information visit http://www.synplicity.com.

About Lattice Semiconductor
Lattice Semiconductor Corporation provides the industry's broadest range of Field Programmable Gate Arrays (FPGA) and Programmable Logic Devices (PLD), including Field Programmable System Chips (FPSC), 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 system design, including an unequaled portfolio of non-volatile programmable devices that deliver instant-on operation, security and "single chip solution" space savings.

Lattice products are sold worldwide through an extensive network of independent sales representatives and distributors, primarily to OEM customers in communications, computing, industrial, consumer, automotive, medical and military end markets. 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 http://www.latticesemi.com.

Forward Looking Statements:

Synplicity
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 performance and benefits of the newest version of the Synplify Pro tool, 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
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, estimates of market size and growth rate, our dependencies on our 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.

###

Synplicity and Synplify Pro are registered trademarks of Synplicity, Inc. Other product names used in this publication are for identification purposes only and may be trademarks of their respective holders.

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

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

Synplicity Reader Contact:
Jeff Garrison
Synplicity
(408)215-6000
jeff@synplicity.com

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