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

1/2/4 Gbps Multirate Transimpedance Amplifier

VSC7975, VSC7977

The VSC7975 and VSC7977 are multirate

transimpedance

amplifiers

for

Gigabit

Ethernet, Fibre Channel, and Infiniband

applications. The devices provide a means for

adjusting their bandwidth to allow full

compliance with multiple Gigabit Ethernet, Fibre Channel, and

Infiniband standards. The VSC7975 and VSC7977 are equipped

with a single pin that serves both as a control for bandwidth

as well as a linear received optical power monitor. This allows

BLOCK DIAGRAMS:

GENERAL DESCRIPTION:

the device to have multirate bandwidth control, power monitoring,

and differential outputs and be assembled in a standard 5-pin TO-

46 package. A space-saving filter connection is provided for

positive bias to the photodiode through a filter resistor to VCC.

The VSC7977 is available in die form or 5-pin TO-46 package with

short wavelength PIN photo detector. The VSC7975 is available in

a 5-pin TO-46 package with long wavelength PIN photo detector.

741 Calle Plano

Camarillo, CA 93012, USA

Tel: +1 805.388.3700

Fax: +1 805.987.5896

www.vitesse.com