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VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC7924

Features

鈥?Rise Times Less Than 100ps

鈥?High-Speed Operation

(Up to 2.5Gb/s NRZ Data)

鈥?Single-Ended Operation

鈥?Single Power Supply

鈥?Direct Access to Modulation and Bias FETs

鈥?Data Density Monitors

鈥?24-Pin Ceramic Package

SONET/SDH 2.5Gb/s Laser Diode Driver

Applications

鈥?SONET/SDH at 622Mb/s, 1.244Gb/s, and 2.488Gb/s

鈥?Full-Speed Fibre Channel (1.062Gb/s)

General Description

The VSC7924 is a single 5V supply, 2.5Gb/s laser diode driver with direct access to the laser modulation

and bias FETs. Laser bias and modulation currents are set by external components allowing precision monitor-

ing and setting of the current levels. Data inputs accept ECL levels. Data density outputs are provided to allow

the user to adjust the laser bias in high unbalanced data applications.

VSC7924 Block Diagram

IOUT

NIOUT

MK

NMK

DIN

VREF

IMOD

VIP

*TERM

VIB

MIP

MIB

IBIAS

*Terminated to Off-chip Capacitor

G52156-0, Rev 3.0

05/01/01

漏

VITESSE

SEMICONDUCTOR CORPORATION

鈥?741 Calle Plano 鈥?Camarillo, CA 93012

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

Internet: www.vitesse.com

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