Lattice Semiconductor Provides FPSC Device to Extreme Networks to Enable 10-Gigabit Ethernet on the BlackDiamond Core Switch

HILLSBORO, Ore. - September 9, 2002 - Lattice Semiconductor Corporation (NASDAQ: LSCC) and Extreme Networks, Inc. (NASDAQ: EXTR) today announced that Extreme Networks has utilized Lattice's ORLI10G FPSC within their flagship core-switching platform. Extreme Networks has deployed the 10GLRi modules in its BlackDiamond® 6800 core switching family, designed to provide advanced resiliency and carrier-class fault tolerance for IP data networks, with scalability from 10/100 Megabit-per-second (Mbit/s) to 10 Gigabit-per-second (Gbit/s) data rates. At the heart of Extreme Networks' 10GLRi module is Lattice's 10 Gigabit-per-second line interface field programmable system chip (FPSC), the ORLI10G.

Extreme Networks will be demonstrating maximum Ethernet scalability with its 10- Gigabit Ethernet modules using Lattice's ORLI10G FPSCs at the fall 2002 Networld+Interop exhibition, being held in Atlanta, September 10-12. Lattice's ORLI10G device is a 10 Gigabit Ethernet line interface chip that provides data networking equipment designers with customizable, protocol-independent interfaces to high-speed optical transport facilities used in LAN, WAN, and MAN deployments. It implements a 10 Gigabit/s Sixteen-Bit Interface (XSBI) for optical transponders by combining optimized, embedded core logic together with up to 643K gates of programmable logic. The programmable gates are implemented in Lattice's ORCA® Series 4 field programmable gate array architecture, which is designed specifically to accommodate networking Intellectual Property (IP) cores.

"Extreme Networks is at the forefront of the movement to deploy 10-Gigabit Ethernet networking and Lattice's programmable system chip approach provides a leading solution as we deliver our standards-based products," said Herb Schneider, vice president of engineering for Extreme Networks. "Customers are demanding more from their applications and Extreme Networks' 10-Gigabit Ethernet solution, with extensive bandwidth management and resiliency features, represents a cost-effective way to scale the network on an established switching platform."

"Lattice's programmable networking system-chip technology is the perfect solution for the emerging next-generation systems, such as Extreme Networks' BlackDiamond 6800 core switches," said Stan Kopec, vice president of marketing at Lattice Semiconductor. "By coupling high-speed embedded core macros with high-performance field programmable gates on silicon, together with system-level Intellectual Property cores for instantiation into the programmable logic, we give system designers like Extreme Networks the ability to bring innovative products to market quickly," added Kopec. Lattice's PCS IP core implements all the functions of the physical coding sublayer for 10GbE applications, including a 64/66B encoder/decoder, scrambler/descrambler, and XGMII interface for coupling the ORLI10G to a 10GbE MAC.

Extreme Networks' BlackDiamond 6800 switching series provides robust Ethernet performance with the capabilities to act as an aggregation point for a large number of edge connections while delivering line-rate Quality of Service (QoS) capabilities across every port. As the ideal switching platform for both enterprise and Metro networks, it supports carrier class reliability, physical redundancy and essential security features. Additionally, the BlackDiamond 6800 switching series supports connections to WAN interfaces including Packet-over-SONET and ATM, allowing network managers to leverage existing network infrastructures with Ethernet. The BlackDiamond switching series is available in three different chassis sizes, the BlackDiamond 6804, 6808 and 6816 switches, to deliver high performance Ethernet switching from the constrained areas of the wiring closet to the core of the data center.

Additional ORLI10G Technical Information
The ORLI10G encompasses forward clocked, 16-bit transmit and receive 10 Gbit/s interfaces (as per OIF 99.102.5). This 16-bit interface runs at the following rates:

• 622 Mbits/s: OC-192/STM-64 SONET/SDN interface (SFI-4)
• 645 Mbits/s: 10 Gigabit/s Sixteen-bit Interface (XSBI)
• 667 Mbits/s: Strong FEC interface (digital wrapper and OC-192/STM-64)
• 781 Mbits/s: Super FEC interface (digital wrapper and OC-192/STM-64)
• 850 Mbits/s: Super FEC interface (digital wrapper and OC-192/STM-64)

The device interfaces directly to industry-standard multiplexer and demultiplexer ICs. This allows Lattice to offer cost-effective solutions for a variety of line interfaces:

• Optical Internetworking Forum (OIF) SERDES – Framer Interface (SFI-4)
• 10 Gigabit Ethernet 16-bit Interface (XSBI)
• 10 Gbit/s Strong Forward Error Correction (FEC) rates
• 12.5 Gbit/s Super FEC rates

Lattice's 10 Gigabit Ethernet PCS intellectual property core includes the following features:

• Elastic buffers implemented as 256x72 FIFOs in embedded RAM
• XGMII for interfacing to 10 Gbits/s Ethernet MACs 
• 64/66b encoder/decoder
• Scrambler and deScrambler with word aligner (x59 + x39 +1)
• Quad 2.5 Gbits/s SONET/SDH to 10 Gbits/s SONET/SDH MUX/deMUX

functions

• Idle insertion and deletion
• Serial Management Interface (SMI) corresponding to Clause 45 of the IEEE 802.3ae standard

Lattice can deliver the PCS core as a ready-to-run bitstream or with VHDL source code, along with simulation and synthesis scripts, and complete documentation.

About Extreme Networks
Extreme Networks, Inc., delivers a more effective applications and services infrastructure by creating networks that are faster, simpler and more cost-effective. Headquartered in Santa Clara, Calif., Extreme Networks markets its network switching solutions in more than 50 countries. For more information, visit www.extremenetworks.com

About Lattice Semiconductor Corporation
Oregon-based Lattice Semiconductor Corporation designs, develops and markets the broadest range of high-performance ISP^TM programmable logic devices (PLDs), Field Programmable Gate Arrays (FPGAs) and Field Programmable System Chip (FPSC) devices. 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 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 demand for and production of our customers' systems that use our 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.

Lattice Semiconductor Corporation, L (& design), Lattice (& design), in-system programmable, ISP, ORCA 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.

Extreme Networks and BlackDiamond are registered trademarks of Extreme Networks, Inc. in the United States and other countries.

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