News Article January 24, 2007

Catalyst Semiconductor Launches Three New Families of Voltage Supervisors with Industry’s Broadest Selection of Embedded Memory

SANTA CLARA, Calif.--January 24, 2007--Catalyst Semiconductor, Inc. (NASDAQ:CATS)a supplier of analog, mixed-signal and non-volatile memory semiconductors today launched three new families of voltage supervisors with the industry’s broadest selection of embedded memory. The CAT130xx supervisor family offers 1-, 4-, 8- and 16-kbit embedded EEPROM with Microwire serial interface. The CAT140xx and CAT150xx provide 2-, 4-, 8- and 16-kbit embedded EEPROM with I2C and SPI serial interface protocols, respectively.

The three new Catalyst voltage supervisor families offer seven reset threshold voltage options from 2.32V to 4.63V to support 2.5V, 3V, 3.3V and 5V systems. The reset function is available with either CMOS active low or CMOS active high output options.

“Catalyst is the first company to offer such an extensive range of embedded EEPROM memory and supervisor combinations,” said Scott Brown, Vice President of Marketing for Catalyst Semiconductor. “Now designers have a choice of integrating a voltage supervisor with any serial EEPROM from 1-kbit density up to 16-kbits to achieve the exact solution needed for the specific application.”

About Catalyst Semiconductor
Founded in 1985, Catalyst Semiconductor, Inc. is headquartered in Santa Clara, California. The Company produces analog and mixed signal products in addition to an extensive range of non-volatile memories. The analog and mixed-signal product lines include Digitally Programmable Potentiometers [DPP(tm)], white and color LED drivers, DC/DC converters, voltage supervisors, linear regulators and I/O expanders. The memory product lines consist of serial and parallel EEPROMs, Flash and NVRAM. Catalyst devices are used in telecommunications, networking systems, computation, automotive, industrial and consumer markets. Typical applications include LCD displays, automotive instrumentation, optical networks, modems, wireless LANs, network cards, DIMM modules, cellular telephones, digital satellite box receivers, set-top boxes and Internet routers. Catalyst's Quality Management System is ISO 9001:2000 certified. All Catalyst products are available in “green” lead- and halogen-free versions with full RoHS compliance. For additional information about Catalyst Semiconductor, visit our website at: www.catsemi.com.

Forward-Looking Statements
Statements in this press release, including but not limited those describing Catalyst Semiconductor’s voltage supervisor product availability and lead times are forward-looking statements and, as such, are subject to certain risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. These risks and uncertainties can include factors such as interruptions in our manufacturing processes, delays in our vendors’ manufacturing or delivery of raw materials and volatility in the technology market sector and/or semiconductor industry. Further information on these and other forward-looking statements may be reviewed in our SEC reports under “Certain Factors That May Affect the Company’s Future Results of Operations.” These SEC reports include, but are not limited to our Annual Report on Form 10-K for the year ended April 30, 2006 and subsequent Quarterly Reports on Form 10-Q for the first and second quarters of fiscal year 2007.

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Editor Notes:

1. Trademark notices: DPP is a trademark of Catalyst Semiconductor, Inc.
2. I²C is a registered trademark of Philips Corporation.
3. Electronic images are available at: www.catsemi.com/editor.