AMCC Wins EDN Innovation of the Year Award for Popular PRS 5G/20G Switch Fabrics; AMCC's Communications Experts Continue to Garner Industry Accolades.

SAN DIEGO -- Applied Micro Circuits Corporation (AMCC) (NASDAQ:AMCC) today announced that its Packet Routing Switch (PRS) 5G/20G solutions have been selected as the winners from a field of hundreds of entries as EDN Magazine's Innovation of the Year Award in the Communications/Networking ICs category. This award arrives on the heels of Best in Show and Best Telecom Product recognition at the Network Systems Design Conference (NSDC) for the MISSION(TM) platform, yet another leading communications solution from AMCC.

The EDN Innovation Awards recognize both the global semiconductor industry's most significant advances in 13 major product categories and the innovative engineers who led the development of new technologies. Since 1990, the EDN Innovation Awards honor the people, products and technologies that have shaped the semiconductor industry over the past year. As part of the selection criteria, nominees within the Innovations of the Year product/technology categories must have demonstrated an innovation that resulted in a significant advance in technology and/or product development during the past 12 months, and shipped in production in the 2004 calendar year.

"Innovation is the heart and soul of engineering, and these awards demonstrate that the search for new technologies to improve quality of life is alive and well in the global semiconductor industry," said John Dodge, EDN editor in chief. "We applaud all the engineers who are dedicated to nurturing the spirit of discovery and invention."

EDN announced that AMCC won the coveted EDN Innovation of the Year Award at its 15th Annual Innovation Awards at a black-tie event on March 7, 2005 at the Intercontinental Mark Hopkins in San Francisco. The event featured keynote addresses by Walter Mossberg, author of The Wall Street Journal's "Personal Technology" column, and Geoffrey C. Orsak, PhD, Dean of Southern Methodist University's School of Engineering. Complete information on the EDN Innovation Awards can be found at www.edn.com/innovation.

"This award is especially meaningful because the recognition comes from not only EDN's well-respected editorial staff and Editorial Advisory Board, but also from EDN's worldwide audience of electronics engineers and engineering managers - the customers we work so hard to serve," said Mark Hunsicker, vice president of marketing for AMCC's Communications Group. "We're proud of our long history of innovation and integration at AMCC, and know that our strong expertise in these markets will continue to generate solutions like the PRS 5G/20G that meet the price and performance needs of our tier-one customers."

PRS 5G/20G

AMCC's PRS 5G and PRS 20G devices, bring greater granularity and Internet class of service to smaller-capacity systems like remote access devices, enterprise networking equipment, smaller-capacity SAN systems and increasingly popular Advanced Telecom Computing Architecture (ATCA) platforms. An integral part of a complete system solution with AMCC network processors, traffic managers, framers and software tools, the seamless upgrade path of the PRS 5G and PRS 20G to high-performance solutions like the recently announced PRS Q-80G or production shipping PRS 80G will enable customers to develop efficient, smaller-capacity systems and evolve to larger systems in the future. For additional technical information on AMCC's PRS 5G/20G, visit www.amcc.com/BestInClass/PRS5G_20G. For a photo of these devices, visit www.amcc.com/BestInClass/PRS5G_20GPhoto.

About EDN

EDN, the premier design magazine of the electronics industry, is published by Reed Business Information. Headquartered in Newton, Massachusetts, EDN serves the vital information needs of design engineers and engineering managers worldwide. The EDN franchise includes EDN, EDN Europe, EDN Asia, EDN China, EDN Japan, and EDN.com, the only full-content, EOEM publication and Web site.

About AMCC

AMCC provides the essential building blocks for the processing, moving and storing of information worldwide. The company blends systems and software expertise with high-performance, high-bandwidth silicon integration to deliver silicon, hardware and software solutions for global wide area networks (WAN), embedded applications such as PowerPC and programmable SOC architectures, storage area networks (SAN), and high-growth storage markets such as Serial ATA (SATA) RAID. AMCC's corporate headquarters are located in San Diego, California. Sales and engineering offices are located throughout the world. For further information regarding AMCC, please visit our web site at http://www.amcc.com.

Forward Looking Statements

The statements contained in this press release that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements, including statements relating to the markets, growth of markets and products, including the risk that the markets would not grow at the rates forecasted, and the demand for products would not materialize, risks relating to general economic conditions, as well as the risks and uncertainties set forth in the Company's Annual Report on Form 10-K for the year ended March 31, 2004, and in other filings of the Company with the Securities and Exchange Commission. As a result of these risks and uncertainties, actual results may differ materially from these forward-looking statements. The forward-looking statements contained in this news release are made as of the date hereof and AMCC does not assume any obligation to update any forward-looking statement.

AMCC is a registered trademark of Applied Micro Circuits Corporation. All other trademarks and registered trademarks are the property of their respective owners.