CATALYST SEMICONDUCTOR AND MOUSER ELECTRONICS SIGN DISTRIBUTION AGREEMENT

Mouser Electronics of Mansfield, Texas, will distribute Catalyst Semiconductors serial and parallel EEPROMs, Digitally Programmable Potentiometers and mixed-signal integrated circuits. Mouser Electronics is a nationwide, catalog and on-line distributor with worldwide shipping capabilities. Mouser specializes in supplying sample quantities, and new product introduction quantities to electronic engineers, academic institutions and manufacturers.

Catalyst Semiconductor, Inc.
David Gillooly
Director of Marketing
Telephone: 408.542.1080
Email: david.gillooly@catsemi.com

FOR IMMEDIATE RELEASE

CATALYST SEMICONDUCTOR AND MOUSER ELECTRONICS SIGN DISTRIBUTION AGREEMENT

Sunnyvale, Calif. (March 28, 2003) -- Catalyst Semiconductor (Nasdaq: CATS) today announced Mouser Electronics of Mansfield, Texas, will distribute Catalyst Semiconductors serial and parallel EEPROMs, Digitally Programmable Potentiometers and mixed-signal integrated circuits. Mouser Electronics is a nationwide, catalog and on-line distributor with worldwide shipping capabilities. Mouser specializes in supplying sample quantities, and new product introduction quantities to electronic engineers, academic institutions and manufacturers.

Catalyst is focused on increasing our value to our global customer base with new SPI EEPROM products along with our new mixed-signal and proprietary power management ICs. This requires that we support the design engineer as early as possible in the design cycle with quick response and even quicker delivery of low volume orders," said Barry Wiley, Vice President of Marketing for Catalyst Semiconductor. Mouser has invested heavily in on-line ordering and order fulfillment technology that has made them one of the top ten most preferred distributors in America."

Electronic Buyers News (EBN), an industry-leading weekly publication, rated Mouser Electronics as a Top-Performer and one of the Top 10 most preferred distributors of electronic components in America. EBN also rated Mouser among the Top 10 most preferred distributors in every product family surveyed including; semiconductors, passive components, interconnects and electromechanical devices.
Catalyst Semiconductors Digitally Programmable Potentiometer integrated circuits are a great example of the innovative mixed-signal products we offer the design community," said Mouser Product Marketing Director Brad Taylor. Catalysts focus on quality, delivery and innovation in serial and parallel EEPROM memory and analog products were key reasons to partner."

About Mouser Electronics

Mouser Electronics, Inc., a subsidiary of TTI, Inc. is a leading on-line, catalog and national electronics distributor featuring award winning service. From its new state-of-the art 170,000 square-foot facility orders are shipped same-day from 7am-8pm Central Time Zone. Mousers website makes it easier for customers with on-line ordering, bill of material tools, data sheets, and on-line catalog browsing. Mouser is one of the fastest distributors from technical support to shipping. The company believes in providing engineers and buyers of electronic components the best possible service, regardless of the size of the customer or the size of the order. Mouser is the top rated distributor for Ease of Doing Business, Availability, and On-time Delivery.

Mouser Electronics, Inc.
1000 North Main Street
Mansfield, TX 76063
Tel: (800) 346-6873
Fax: (817) 804-3899
www.mouser.com

About Catalyst Semiconductor

Founded in 1985, Catalyst Semiconductor, Inc. is headquartered in Sunnyvale, California. The Company is a developer and marketer of programmable products used in telecommunications, networking systems, computation, automotive, industrial and consumer markets. The Company designs and markets a broad range of programmable products including Flash Memories, Parallel and Serial EEPROMs with I2C, SPI and Microwire interfaces, NVRAMs, Digitally Programmable Potentiometers, Microcontroller Supervisory circuits and other programmable Mixed Signal products. Typical applications for the Companys products include digital cameras, PDAs, switching power supplies, modems, wireless LANs, network cards, PC BIOS, DIMM modules, cellular telephones, digital satellite box receivers, set-top boxes and Internet routers. Catalyst's Quality Management System is ISO 9001 certified. Additional information about Catalyst Semiconductor is available on the Companys web site at www.catalyst-semiconductor.com.

Except for those statements that report the Companys 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 Companys Future Results of Operations" listed from time to time in Catalysts SEC reports including but not limited to the report on Form 10-K for the year ended April 30, 2002, and to the reports on Form 10-Q for the quarters ended July 31, 2002, October 31, 2002, and January 31, 2003.

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Editor Notes:
1. Trademark notices: DPP is a trademark of Catalyst Semiconductor. I2C is a registered trademark of Philips Corporation. SPI is a trademark of Motorola, Inc. Microwire is a trademark of National Semiconductor.
2. Electronic images are available at www.catalyst-semiconductor.com/editor.