Up to 11.3 Gb/s 3.3V: VCSEL, DML, EML Laser/Modulator Driver Family

VSC7980, 7981, 7982

The VSC7980, VSC7981 and VSC7982 are

low power 10Gb/s laser and modulator

drivers for both Telecommunications and

Data Communications. Applications include

modules and line cards for OC-192/STM-64

SONET/SDH

as

well

as

10GE/10GFC

protocols. The VSC7980 is intended to drive Vertical Cavity

Surface Emitting Lasers (VCSEL). The VSC7981 is intended to

drive Direct Modulated Lasers (DML) such as Distributed

Feedback (DFB) and Fabry-Perot (FP) Lasers with a 25 Ohm

characteristic impedance. The VSC7982 is intended to drive DML

and Externally Modulated Lasers (EML) such as Electro

Absorption modulators with a 50 Ohm characteristic impedance.

BLOCK DIAGRAMS:

The 50 Ohm on-chip back-termination simplifies the process of

matching the laser to the driver. The VSC7980, VSC7981 and

VSC7982 are equipped with XFP-compliant fault indicators

(FLTN_DISN and EOLN), dual disable control (FLTN_DISN and

TX_DIS), Automatic Power Control (APC), temperature sensor,

voltage reference, various eye safety features and Extinction

Ratio Control (ERC) with an external micro controller. These

device controls and monitors were designed to be controlled

with set resistors, potentiometers, or Digital-to-Analog

Converters (DACs) and monitored with Analog-to-Digital

Converters (ADCs) for ultimate flexibility in module design. The

VSC7980, VSC7981 and VSC7982 are available in a 5mm x 5mm

32-pin plastic QFP-N package.

GENERAL DESCRIPTION:

741 Calle Plano

Camarillo, CA 93012, USA

Tel: +1 805.388.3700

Fax: +1 805.987.5896

www.vitesse.com

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.

DATA

Modulation and Bias Control and Montoring

DATAN

BSNK

GND

OUT

OUTN

17

25

VCC = +3.3V

TX_DIS

FLTN_DISN

V CC= +3.3V

CD

VCC= +3.3V

EOLN

BSRC

LCLRN

SRC_SNKN

C TERM

IOM

BIASMAX

CPSET

MODMON

BIASMON

VREF

APCSET

MD

APCREF

MODSET

IOB

IMOD

VTEMP

DFB TOSA

VCC

DATA

Modulation and Bias Control and Montoring

DATAN

BSNK

OUT

OUTN

17

25

VCC = +3.3V

TX_DIS

FLTN_DISN

VCC = +3.3V

C D

V CC= +3.3V

EOLN

BSRC

+3.3V

LCLRN

SRC_SNKN

C TERM

IOM

BIASMAX

CPSET

MODMON

BIASMON

VREF

APCSET

MD

APCREF

MODSET

IOB

IMOD

VTEMP

+3.3V

DFB TOSA

Configuration with a Common Cathode Laser

Configuration with a Common Anode Laser