© VITESSE SEMICONDUCTOR CORPORATION

Page 1

10/12/98

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

VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC8150

2.488Gb/s SONET/SDH

Overhead Monitor

G52186-0, Rev. 3.0

Features

General Description

The VSC8150 monitors an SONET/SDH signal in order to provide section and line data for Operations,

Administration, Maintenance, and Provisioning (OAM&P) at multiple SONET/SDH rates. Differential PECL

clock and data input receivers and a differential data output isolate the high-speed interface. Low-speed TTL

inputs and outputs allow the use of inexpensive programmable logic to perform OAM&P functions. The

VSC8150 is an ideal solution for constructing a non-intrusive SONET/SDH monitoring interface when visibil-

ity of payload data is not required.

Functional Description

The VSC8150 high-speed interface receives recovered SONET/SDH data RXSIN

+/− and clock RXS-

CLKIN

+/− and provides a re-timed data output RXSLBOUT+/−. Internally the data is framed and SEF/LOF

framing alarms generated. Incoming B1 parity is calculated and compared with the transmitted B1 value, and

detected errors are output. The 27 bytes of the first STS-1 transport overhead are descrambled and output for

processing.

VSC8150 Functional Block Diagram

• Integrated 2.488 Gb/s Demultiplexer

• Outputs SONET/SDH Transport Overhead

• Support for Multiple SONET/SDH Rates

• B1 Calculation and Error Reporting

• LOF/SEF Alarm Generation

• Serial Data Loopthrough Output

• 100 PQFP Package

• Single 3.3V Supply Option

FRAMER

B1 CHECK

1:8

DMX

DESCRAMBLER

CONTROL

&

ALARM DETECTION

311MHz INTERNAL

CLOCK SOURCE

SOHCLK

SOHOUT[7:0]

RXFPOUT

RXFRERR

RXSEF

RXLOF

B1ERR

RESET

SELFRDET[1:0]

FRDETEN

RXSIN+/-

RXSCLKIN+/-

RXSLBOUT+/-

LOS

OVERHEAD

LATCH

RXPCLKIN

RXPIN[7:0]

RATESEL[1:0]

DISDSCRM