Vitesse Debuts Multi-rate, Multi-protocol Transceiver Chipset

4/16/2003 - Vitesse Semiconductor Corp. (Nasdaq: VTSS), broadened its family of industry renowned physical layer and physical media devices by introducing the first multi-rate, multi-protocol Transceiver, Transimpedance Amplifier (TIA) and EAM Driver chipset.

This 10G all-rate chipset reduces the number of external components required to implement MSA-compliant modules and delivers up to 11.3Gbps of performance to support all 10Gbps standard and forward error correction rates. Using this chipset results in an overall reduction in the bill of material, chip count, cost, power, and consumed board space, as well as a significant decrease in module development time. These highly integrated devices enable OEMs to meet the price, power and performance required for next-generation communications equipment.

The advanced features of these products provide the industry with many first-time capabilities. The Transceiver (VSC8473) fully integrates all 300-pin MSA module clocks, output mutes, line and loop back modes, alarms, optional high-speed output clock, and a highly flexible reference clock support capability. Many of these functions are not currently supported by discrete Multiplexer and Demultiplexer solutions or other available single chip transceivers. The EAM Driver (VSC7983) integrates operational amplifiers that preclude the need for additional off-chip circuitry to stabilize bias and modulation currents. The TIA (VSC7999) is the first product of its type to integrate both a photocurrent monitor output for highly accurate diagnostics and a programmable input slicing threshold adjustment to compensate for EDFA nonlinearities and fiber dispersion. These performance metrics and features operate at a total chipset power of less than 2.5 watts and enable next-generation modules to decrease power by 30 to 50 percent and reduce consumed board area by a factor of 2:1.

Applications for the chipset include 300-pin MSA transponders and 10 Gigabit Ethernet (GbE), modules, and line cards for OC-192/STM-64 and 10 Gigabit Fibre Channel systems. It is also designed to support the industry's transition to low cost XFP modules interfacing with host SERDES for 10GbE, Fibre Channel, and SONET/SDH markets. The high-performance, low power and small footprint of the VSC7983 Driver and VSC7999 TIA will allow XFP manufacturers to extend module performance into intermediate and long reach distances at up to an order of magnitude lower price point. Interoperability between the VSC8473 and commercially available XFP modules has been proven and evaluation platforms are available. This chipset can assist in accelerating the proliferation of the XFP standard.

"Vitesse's highly-integrated chipset achieves two industry milestones: it launches the campaign needed to drive the market towards lower cost module solutions by offering at least a two fold cost advantage over competing solutions, and for the first time, enables performance across all industry standard data rates," said Tony Conoscenti, director of product marketing for Vitesse's Transport Division. "Because each device offers best-in-class performance and features, together the chipset is unmatched in providing OEMs with an optimal solution for their design needs."

Additional Chipset Features
VSC8473: the first 16-bit, 9.953 to 11.3Gb/s Transceiver. The device is a low power (1.1W typical), SONET/SDH-compliant, 16:1 Serializer/Deserializer manufactured in 0.13-micron CMOS process with integrated Multiplexer, Demultiplexer, CMU, CDR and limiting amplifier. It operates from a single 1.8V supply with optional 3.3V supply for MSA alarm compliance and allows simultaneous and asynchronous operation of the data receive and transmit paths. The VSC8473 incorporates an industry standard two wire microcontroller interface for access to all control and status signals as well as the ability to optimize the clock and data recovery threshold for various receiver front ends and fiber spans. It operates over an extended temperature range of -5C to +90C. Available in two product grades: VSC8473SK operates from 9.9Gbps to 10.7Gbps, and the VSC8473SK-01 operates from 9.9Gbps to 11.3Gbps.

VSC7983YE-02: the first 11.2Gbps EAM Driver. The device features a single +5 or -5.2V supply operation, programmable output swing up to 3V, 25 to 85 percent duty cycle control and selectable data re-timing to improve jitter performance. Operating over an extended temperature range of -10C to +95C with a supply tolerance down to 4.75V, makes this part attractive for Ethernet applications as well as OC-192 compliant modules. The VSC7983YE-02 has first-rate data input sensitivity of 300mV and very low total output jitter of 1.6ps rms. The unique architecture provides unparalleled output impedance matching many industry standard modulators. This device is also available in a 32-pin metal glass package (VSC7983CD) and in die form (VSC7983-W).

VSC7999-W: the first 12.5Gbps Transimpedance Amplifier with a programmable input slicing threshold adjust. The device operates from a single 3.3V supply, offers high-gain (9K Ohm typical) precluding the need for an additional post amplifier in many modules, 10GHz bandwidth and a photocurrent monitor output and operates over an extended temperature range of -10C to +95C. The VSC7999 is compatible with p-i-n or avalanche photodiodes and is capable of amplifying input currents up to a robust 2.5mA overload with low duty cycle distortion. The TIA is available in die form.

Packaging, Pricing and Availability

About Vitesse
Vitesse Semiconductor is a leading designer and supplier of innovative, high-performance integrated circuits and optical modules used in next-generation networking and optical communications equipment. The Company's products address the needs of Enterprise, Access, Metro, Core, and Optical Transport network equipment manufacturers who demand a robust combination of high-speed, high-service delivery and low-power dissipation in their products. In concert with its broad communications product portfolio, Vitesse also develops ICs for storage area networking and enclosure management. Company and product information is available by calling 1-800-VITESSE or at

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