© VITESSE SEMICONDUCTOR CORPORATION

Page 1

2/23/00

741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896

VITESSE

SEMICONDUCTOR CORPORATION

Target Specification

VSC8124

2.488 Gb/s Quad

Data Re-timer

G52271-0, Rev. 1.14

Features

General Description

The VSC8124 is a four channel, 2.5 Gb/s data re-timer for cleaning up data downstream of optical links or

cross point switches. Serial data at the 2.5 Gb/s rate is independently re-timed on four channels, and driven dif-

ferentially by CML drivers. The re-timing function on each channel can be individually bypassed for lower rate

signals or test purposes. The VSC8124 provides four independent loss of signal indicators in the event of loss of

synchronous data transitions.

• Four Channel 2.488 Gb/s Data Recovery

• SONET Quality Jitter Tolerance

• Fastlock Data Acquisition less than 200

Bit Times

• Loss of Signal Indicators

• Long Strings of Static Data Tolerated by the

Clock Recovery Circuit without Loss of Signal

• First Order Clock Recovery Loop Minimizes

Jitter Accumulation

• Differential on Chip Terminated Serial Data I/O

• Bypass for OC3, OC12 Data Rates

• 155.52 MHz Reference Clock Frequency

• 3.3V Supply Operation

• 14 x 14mm, 100 Pin Thermally Enhanced

TQFP Package