VITESSE

SEMICONDUCTOR CORPORATION

Data Sheet

VSC830

Dual 2x2 Crosspoint Switch

2.7Gb/s Asynchronous

G52192-0, Rev 4.0

Page 1

05/23/01

© 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 VSC830 is a monolithic dual 2x2 asynchronous crosspoint switch, designed for critical signal path

control and buffering applications, such as loop-back, protection switching, and multi-channel backplane

driver/receivers. Signal path delay is tightly matched between each output channel to eliminate the need for

delay path compensation when switching between signal sources.

The crosspoint function is based on a multiplexer tree architecture. Each 2x2 switch can be considered as a

pair of 2:1 multiplexers that share the same inputs. The signal path through each switch is fully differential and

delay matched. The signal path is unregistered, so there are no restrictions on the phase, frequency, or signal

pattern at each input. Unused outputs can be independently powered off, thereby eliminating power on unused

sections (see Design Guide section in this data sheet). The switch control inputs can be configured to be com-

patible with PECL or TTL levels. The high-speed input and output levels are nominally PECL compatible and

capable of interfacing with a wide range of termination schemes.

VSC830 Symbol Diagram

• Dual 2x2 Crosspoint Switch

• 2.7Gb/s NRZ Data Bandwidth, 2.7GHz Signal

Bandwidth

• PECL/TTL-Compatible Control Inputs

• PECL-Compatible High-Speed I/O

• 50

Ω Source Terminated Output Driver and

Programmable Input Terminations

• Single 3.3V Supply, 1W Typical Dissipation

• Power-Down Capability for Unused Outputs

• Compact 44-Pin PQFP, 10x10mm Package

A1

Y1

A2

Y2

S1,S2

A1

Y1

A2

Y2

S1,S2