Catalyst Semiconductor Selected by Samsung Electronics as Eco-Partner Affiliate Company.

SUNNYVALE, Calif. -- Catalyst Semiconductor, Inc. (Nasdaq:CATS), a leading supplier of high performance analog/mixed-signal solutions and nonvolatile memory, today announced that Samsung Electronics has certified Catalyst Semiconductor as an Eco-Partner Affiliate Company. This means that Catalyst has fulfilled the Samsung Electronics Standards for control of substances with environmental impacts within products and has established a stable environmental quality control system.

"This recognition by Samsung is an honor," said Dan Terry, Director of Quality Systems. "We at Catalyst Semiconductor are very proud of our technical leadership in environmental issues, and this is a clear reflection of our long term commitment," he concluded.

Samsung's Eco-Partner Certification

The Samsung Eco-Partner certification program expects active participation from suppliers to achieve the goal of satisfying RoHS regulations, restricting the use of harmful substances to reduce potential impacts on the environment and human body, which will become effective July 2006. Samsung Eco-Partner's are required to:

--identify the substances regulated by Samsung Electronics and take corrective action if the regulated substances are contained in parts and components supplied to Samsung Electronics

--guarantee their compliance with the SEC Environmental Standard (0QA-2049) and submit the required documents

--be responsible for all problems that may result from supplying parts that do not comply with the SEC Environmental Standard (0QA-2049) or from submitting forged or inaccurate documents and data.

Issued by the CS Management Center, Samsung Electronics Co. Ltd., the certification covers the two year period from October 1, 2004, through September 30, 2006.

About Samsung Electronics

Samsung Electronics Co., Ltd. Is a global leader in semiconductor, telecommunication, digital media and digital convergence technologies with 2004 parent company sales of US$55.2 billion and net income of US$10.3 billion. Employing approximately 113,000 people in over 90 offices in 48 countries, the company consists of five main business units: Digital Appliance Business, Digital Media Business, LCD Business, Semiconductor Business and Telecommunication Network Business. Recognized as one of the fastest growing brands, Samsung Electronics is the world's largest producer of color monitors, color TVs, memory chips and TFT-LCDs. For more information, please visit www.samsung.com.

About Catalyst Semiconductor

Founded in 1985, Catalyst Semiconductor, Inc. is headquartered in Sunnyvale, California. The Company is a leading supplier of high performance analog/mixed-signal solutions and nonvolatile memory products used in automotive, aircraft, telecommunications, computation, industrial and consumer markets. The Company designs and markets a broad range of analog/mixed-signal products such as LED Drivers, DC-DC Converters, GPI/O Expanders, Digitally Programmable Potentiometers (DPP(TM)), Microcontroller Supervisory circuits and other analog/mixed-signal products. Programmable products include Serial and Parallel EEPROMs with I2C, SPI and Microwire interfaces, as well as NVRAM and low density Flash Memories. Typical applications include LCD displays, digital cameras, cell phones, automotive instrumentation, modems, wireless LANs, network cards, DIMM modules, digital satellite box receivers, set-top boxes and Internet routers. Catalyst's Quality Management System is ISO 9001:2000 certified. For more information, please visit www.catsemi.com.

Forward Looking Statement

Except for those statements that report the Company's historical results, the statements being made are forward-looking statements. Actual results could differ materially from those projected in the forward-looking statements. Additional information concerning factors that could cause actual results to differ materially from those in the forward-looking statements is contained under the heading "Certain Factors That May Affect the Company's Future Results of Operations" listed from time-to-time in Catalyst's SEC reports including, but not limited to, the report on the Form 10-K for the year ended April 30, 2005 and more recent Form 10-Q.

Editor Notes

1. Trademark notices: DPP is a trademark of Catalyst Semiconductor, Inc. I2C is a registered trademark of Philips Corporation. SPI is a trademark of Motorola, Inc. Microwire is a trademark of National Semiconductor Corporation.

2. The "2" in I2C is superscript.