Alliance Semiconductor Expands Mixed Signal Family to Include PWM Controllers with Integrated EMI Reduction; PWM Controllers Provide Integrated EMI Reduction Capability for More Compact SMPS Designs With Reduced BOM Cost

SANTA CLARA, Calif.—(BUSINESS WIRE)—June 27, 2005— Alliance Semiconductor Corporation (NASDAQ: ALSC), a leading worldwide provider of analog and mixed signal products, high-performance memory products, connectivity and networking solutions for the communications, computing, embedded, industrial and consumer markets, today announced the availability of its newest family of Pulse Width Modulator (PWM) Controllers with Integrated Electro-Magnetic Interference (EMI) Reduction Technology for Low Noise Switched Mode Power Supply (SMPS) Converter and Inverter applications.

System power supply designers are confronted with extremely challenging design parameters in dealing with power consumption, physical space limitations, and EMI reduction issues to meet the required regulatory standards (like FCC, CSA, CSIPR, etc).

This family of PWM controllers is designed to replace the extremely popular series of "184X/384X" PWM controllers in a wide range of Switched Mode Power Supply applications, but with the unique additional advantage of a built-in EMI reduction engine. This additional EMI reduction capability has been achieved by implementing Alliance Semiconductor's proprietary Spread Spectrum Modulation technology.

Alliance Semiconductor expects to continue the product expansion as the line continues its evolution into even higher performance product offerings that address new SMPS markets demanding effective, inherent EMI reduction capability.
---------- ------------------ ---------- -----------------------------
  Class     ALSC Part Number     PKG              DESCRIPTION
                                Options
---------- ------------------ ---------- -----------------------------
   PWM         ASM8P18S42       8 DIP    40KHz-400KHz PWM; 15.4V UVLO;
                                8 SOIC      Integrated EMI Reduction  
---------- ------------------ ---------- -----------------------------
   PWM         ASM8P18S43       8 DIP    40KHz-400KHz PWM; 7.8V UVLO;
                                8 SOIC      Integrated EMI Reduction  
---------- ------------------ ---------- -----------------------------
   PWM         ASM8P18S44       8 DIP    40KHz-400KHz PWM; 15.4V UVLO;
                                8 SOIC      Integrated EMI Reduction  
---------- ------------------ ---------- -----------------------------
   PWM         ASM8P18S45       8 DIP    40KHz-400KHz PWM; 7.8V UVLO;
                                8 SOIC      Integrated EMI Reduction  
---------- ------------------ ---------- -----------------------------


These PWM controllers support both off-line inverter and DC/DC converter designs. Available in both 8 pin SOIC and DIP packages, Alliance Semiconductor offers Commercial and Industrial temperature grades, with standard tin-lead / RoHS and/or Green compliant products. This new product introduction marks Alliance Semiconductor's launch into the power semiconductor market, and provides the industry with a significant player with tried and true value added EMI reduction technology in support of this high growth market. This current offering supports all aspects of the Switched Mode Power Supply market: AC/DC, DC/DC and also certain DC/AC inverter applications.

Samples are available today, with initial pricing set at $2.00 in 1K quantity. Full data sheet / product specifications, and a complete cross reference guide are available online at www.alsc.com.

About Alliance:

Alliance Semiconductor Corporation (NASDAQ: ALSC) is powering every application with high performance solutions for the communications, computing and consumer electronics markets. Utilizing advanced process technologies and design expertise, Alliance provides leading OEMs with a broad portfolio of complementary technologies including analog and mixed-signal products, chip-to-chip connectivity products, networking controllers and high-performance memories. Alliance addresses the complete needs of system developers by leveraging its proprietary advances in Electromagnetic Interference (EMI) reduction, power management and timing technology, HyperTransport(TM) I/O connectivity and specialized memory solutions for next-generation applications. Founded in 1985, Alliance is headquartered in Santa Clara, California with design centers in Bangalore and Hyderabad, India. The company is publicly traded and included in the S&P 600 Index. Additional information is available on the Alliance Web site at: http://www.alsc.com.



Contact:
Alliance Semiconductor Corporation
Muzahid Huda, 408-855-4900
or
Shelton Public Relations
Katie Olivier, 972-239-5119, Ext. 128
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