© VITESSE SEMICONDUCTOR CORPORATION

Page 1

9/14/98

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

VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC8162

2.488 Gbit/sec SONET/SDH

1:16 Demux with Clock Recovery

G52209-0, Rev. 2.0

Features

General Description

The VSC8162 combines a clock recovery unit (CRU) with a 1:16 demultiplexer on a single chip to directly

generate 16-bit wide data from an incoming 2.488Gb/s NRZ data stream. An on-chip Phase Locked Loop (PLL)

generates a 2.488GHz clock which remains phase locked to the incoming data. The incoming data is retimed

and demultiplexed to a 16-bit word. A Loss of Lock (LOL) signal indicates gross conditions where incoming

data no longer has sufficient transitions to keep the CRU in lock.

VSC8162 Functional Block DIagram

• 2.488Gb/s 1:16 Demux with Integrated Clock and

Data Recovery

• Recovered Clock and Data Available

• Monolithic Phase Locked Loop

• Digitally Adjustable Serial Data Sampling Point

• Differential Low Speed Outputs

• Differential/Single-ended Reference Clock

• Loss of Lock Detection

• Meets SONET OC-48 and SDH STM-16 Jitter

Tolerance Requirements

RTDO+

RTDO–

D0+

D0–

D15+

D15–

PARITY+

PARITY–

CLK16+

CLK16–

CLKO+

CLKO–

DI+

DI–

REFCK+

REFCK–

PADJ[4:0]

DINVERT

LOL

NOREF

Clock

Recovery

Data

Retime

Divide

by 16

5