741 Calle Plano

Camarillo, CA 93012, USA

Tel: +1 805.388.3700

Fax: +1 805.987.5896

www.vitesse.com

The VSC7773, VSC7970, VSC7971, VSC7972, and

VSC7973 are high performance Transimpedance

Amplifiers (TIA) for Ethernet, Fibre Channel and

SONET applications. The VSC7773 support rates

from 1 Gbps to 4.25 Gbps. The other parts support rates up to 2.5

Gbps. They feature 5 k

Ω differential transimpedance and 1.8 GHz

bandwidth with source-terminated differential outputs. All five parts

have a linear current monitor, adding diagnostic capabilities, and

simplifying optical alignment during the manufacturing process. A

space saving filter connection is provide for positive bias to the

photodetector through an on-chip 500

Ω resistor to VCC, allowing for

easy assembly on a TO-46 header.

APPLICA TION DIAGRAM:

GENERAL DESCRIPTION:

1 to 4 Gbps Transimpedance Amplifiers with Photocurrent Monitor

1 to 4 Gbps TIAs

TO-46Receiver

Dice

Monitor

VSC7959

VSC7961

Limiting

Amplifier

VSC7939

IMON

VSC7940

Laser

Driver

CDRs

VSC8123

VSC8221

VSC8222

XCVRs

VSC8142

VSC8245

VSC8147

For more information on Vitesse Products visit the Vitesse web site

at www.vitesse.com or contact Vitesse Sales at (800) VITESSE

or sales@vitesse.com

©2004 Vitesse Semiconductor Corporation

Vitesse, ASIC-Friendly, FibreTimer, TimeStream and Snoop Loop are trademarks of Vitesse Semiconductor Corporation.

All other trademarks or registered trademarks mentioned herein are the property of their respective holders. Vitesse

Semiconductor Corporation ("Vitesse") retains the right to make changes to its products or specifications to improve

performance, reliability or manufacturability. All information in this document, including descriptions of features,

functions, performance, technical specifications and availability, is subject to change without notice at any time.