VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC7991

SONET/SDH 10.7Gb/s

Electroabsorption Modulator/Laser Diode Driver

G52321-0, Rev 2.3

Page 1

02/26/01

© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012

Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

Internet: www.vitesse.com

Features

General Description

The VSC7991 is a single 7V supply, 10.7Gb/s Electroabsorption Modulator (EAM)/laser diode driver with

direct access to the laser modulation FETs. Laser offset and modulation currents are set by external components

allowing precision monitoring and setting of the voltage levels. Data inputs are differentially terminated to 50

Ω.

Applications

• SONET/SDH @ 2.488Gb/s, 9.952Gb/s, 10.7Gb/s

VSC7991 Block Diagram

• Maximum Rise/Fall Times of 38ps

• High-Speed Operation

(Up to 10.7Gb/s NRZ Data)

• Differential Inputs

• Single-Supply

• CML-Compatible Data Inputs

• On-Chip 50

Ω Input Terminations

• 50

Ω Output Impedance

50

50

DIN

NDIN

60

IMOD

300

300

NDOUT

DOUT

IBN

DCC

VIP

IB

IP

60

Note: (1) On-die components.