AMCC Builds Upon High-Speed CMOS Design and Electronic Dispersion Compensation Expertise with 10Gbps Dual Clock Data Recovery Device for XFP Module Market.

SAN DIEGO -- AMCC Expands Industry-Leading Physical Layer Portfolio, Providing Customers with a Cost-Effective, Long-Term System Solution for Various-Reach Applications at OC-192 and OC-48 Data Rates

Applied Micro Circuits Corporation (AMCC) (NASDAQ:AMCC) today announced the S19233, a 10Gbps dual Clock Data Recovery (CDR) device with Electronic Dispersion Compensation (EDC) and the S4850, a dual OC-48 CDR. The first in a series of 10Gbps dual CDRs with EDC, AMCC's S19233 is designed for use primarily in XFP MSA modules. The dual CDR mitigates fiber properties, such as Chromatic Dispersion and FR-4 traces up to 30", and boasts industry-leading jitter tolerance (0.8UI) and jitter generation (35mUI) specifications. The combination of these capabilities enables greater design flexibility and creates a cost-efficient opportunity for customers to leverage their existing systems for a variety of applications.

The S19233 supports 10 GbE/FC/SONET/SDH/FEC transmission standards at market-leading data rates from 9.9 to 11.3Gbps. Featuring a small footprint of 6x6 mm(2), the device contains dual CDRs that provide fully integrated clock recovery signal conditioning capabilities for low-power, 10Gbps applications. The S19233 is an integral part of a flexible system solution and can be connected to AMCC's S19237 ser/des device.

"We think the performance of the S19233 as a dual CDR will allow for a greater adoption of the XFP MSA module in the marketplace," said Neal Neslusan, director of marketing for AMCC's transport products. "The newest member of AMCC's proven, CDR/EDC portfolio demonstrates our commitment to the 10Gbps market and expertise in delivering greater functionality in the low-power, high-speed devices our customers require today."

The S19233 can be used in the optical interface of SONET/SDH/FEC/10GbE/10GFC equipment, which consists primarily of the serial transmit interface and the serial receive interface. The S19233's system circuitry consists of a high-speed phase detector, clock dividers and equalization circuitry. The device utilizes on-chip clock recovery/clock clean-up PLL components that allow for the use of a slower external clock reference, 155.52 MHz (or equivalent FEC/10GbE/10Gbps FC rates), in support of existing system clocking schemes.

Similar to the S19233, the S4580 CDR derives high-speed timing signals for SONET/SDH-based equipment but for OC-48 plus FEC data rates. The S4850 receives an OC-48 scrambled NRZ signal and recovers the clock from the data. The device outputs a differential bit clock and retimed data. Packaged in a 121-PBGA, the S4850 offers designers a small package outline with low power dissipation (200 mW/channel).

Demonstration at OFC/NFOEC

AMCC will be demonstrating the capabilities of the S19233 CDR in a FEC environment at the Optical Fiber Communication (OFC) Conference and the National Fiber Optic Engineers Conference (NFOEC) in Anaheim, Calif., March 6-11, 2005. For more information about this product demonstration, please visit AMCC in booth #2641 at OFC/NFOEC, which is being held at the Anaheim Convention Center. Exhibits will be open Tuesday, March 8, through Thursday, March 10.

Availability

Packaged in a 49-pin PBGA, the S19233 is currently sampling to development partners, with volume production scheduled for the second half of 2005. The S4850 is also currently sampling, with volume production scheduled for later this month. For additional technical information on the S19233 visit, http://www.amcc.com/BestInClass/S19233. For additional technical information on the S4850 visit, http://www.amcc.com/BestInClass/S4850. For a photo of the S19233 and S4850, visit http://www.amcc.com/BestInClass/S19233Photo.

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. 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.