SLK2501

OC48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER

SLLS502A – OCTOBER 2001 – REVISED NOVEMBER 2001

1

POST OFFICE BOX 655303

Support Clock/Data Recovery and

Multiplexer/Demultiplexer Functions

Ethernet and OC-3 Data Rate With Autorate

Detection

Transceiver and Repeater Functions in a

Single Chip Through Configuration Pins

Interface

LVDS Interface

Optical Modules

Serial Interface With Programmable

De-Emphasis for the Serial Output

Compatible Interface

150 mV Min

Design

description

The SLK2501 is a single chip multirate transceiver IC used to derive high speed timing signals for SONET/SDH

based equipment. The chip performs clock and data recovery, serial-to-parallel/parallel-to-serial conversion

and frame detection function conforming to the SONET/SDH standards.

The device can be configured to operate under OC-48, OC-24, OC-12, or OC-3 data rates through the rate

selection pins or the autorate detection function. An external reference clock operating at 622.08 MHz is

required for the recovery loop, and it also provides a stable clock source in the absence of serial data transitions.

The SLK2501 accepts 4 bit LVDS parallel data/clock and generates a NRZ SONET/SDH-compliant signal at

OC-3, OC-12, OC-24 or OC-48 rates. It also recovers the data and clock from the serial SONET stream and

demultiplexes it into 4-bit LVDS parallel data for full duplex operation. TXDATA0 and RXDATA0 are the first bits

that are transmitted and received in time, respectively. The serial interface is a low jitter, PECL compatible

differential interface.

The SLK2501 provides a comprehensive suite of built-in tests for self-test purposes including local and remote

The device comes in a 100-pin VQFP package that requires a single 2.5-V supply with 3.3-V tolerant inputs on

the control pins. The SLK2501 is very power efficient, dissipating less than 900 mW at 2.488 Gbps, the OC-48

data rate, and it is characterised for operation from –40

°C to 85°C.

AVAILABLE OPTIONS

PACKAGE

TA

PowerPAD QUAD

(PZP)

–40

°C to 85°C

SLK2501IPZP

Copyright

 2001, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.