VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC7937

Single Supply 2.5Gb/s Voltage Driver

G52200-0, Rev 3.0

Page 1

03/05/01

© 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

Applications

General Description

The VSC7937 is a single -5.2V supply, 2.5Gb/s voltage driver with direct access to the output modulation

and bias FETs. The output stage can drive 60mA into 50

Ω with adequate output voltage compliance. Output

bias and modulation currents are set by external components allowing precision monitoring and setting of the

output voltage levels.

VSC7937 Block Diagram

• Typical Rise Times of 100ps

• High-Speed Operation

(Up to 2.5Gb/s NRZ Data)

• 3V Output Voltage Compliance

• Single-Ended or Differential Input Operation

• Single Power Supply: +5V or -5.2V

• Direct Access to Modulation and Bias FETs

• On-Die MUX for Clocked or Unclocked

Applications

• On-Chip 50

Ω Input Clock and Data Termination

• SONET/SDH @ 622Mb/s, 1.244Gb/s, 2.488Gb/s

• Full-Speed Fibre Channel (1.062Gb/s)

IBIAS1

OUT

NOUT

VIP

VIB2

VIB1

MIP

MIB1

MIB2

IMOD

IBIAS2

*Terminated to Off-chip Capacitor

**On Die Components

M

U

X

SEL

DIN

DINTERM*

DQ

50 Ω**

50 Ω**

50 Ω**

50 Ω**

NDIN

CLK

NCLK

CLKTERM*

SEL