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VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC8163

Features

鈥?2.488Gb/s 16:1 Multiplexer

鈥?Targeted for SONET OC-48 / SDH STM-16

Applications

鈥?Differential LVPECL Low-Speed Interface

OC-48 16:1 SONET/SDH

MUX with Clock Generator

鈥?On-Chip PLL-Based Clock Generator

鈥?128 Pin, 14x20mm PQFP Package

鈥?Single +3.3V Supply

General Description

The VSC8163 is a 16:1 multiplexer with integrated clock generator for use in SONET/SDH systems oper-

ating at a 2.48832Gb/s data rate. The internal clock generator uses a Phase-Locked Loop (PLL) to multiply

either a 77.76MHz or 155.52MHz reference clock in order to provide the 2.48832GHz clock for internal logic

and output retiming. The 16-bit parallel interface incorporates an on-board FIFO, eliminating loop timing

design issues by providing a flexible parallel timing architecture. The device operates using a +3.3V power sup-

ply, and is packaged in a thermally-enhanced plastic package. The thermal performance of the 128PQFP allows

the use of the VSC8163 without a heat sink under most thermal conditions.

VSC8163 Block Diagram

CLK16I+

CLK16I-

D0+

D0-

Write

Pointer

Input Register

16x5 FIFO

Output

Retime

DO+

DO-

D15+

D15-

REFCLKO+

REFCLKO-

Reset

CLK16O+

CLK16O-

REFCLK+

REFCLK

REF_FREQSEL

Read

Pointer

FIFO

Control

CLKO+

CLKO-

FIFO_WARN

Divide by 16

Divide

by 2

2.488GHz

PLL

G52216-0, Rev 3.3

01/05/01

漏

VITESSE

SEMICONDUCTOR CORPORATION

鈥?741 Calle Plano 鈥?Camarillo, CA 93012

Tel: (800) VITESSE 鈥?FAX: (805) 987-5896 鈥?Email: prodinfo@vitesse.com

Internet: www.vitesse.com

Page 1

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