SLK2721

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

WITH ENHANCED JITTER TOLERANCE

SLLS532 − JUNE 2002

1

POST OFFICE BOX 655303

Support Clock/Data Recovery and

Multiplexer/Demultiplexer Functions

OC-24, OC-12, Gigabit Ethernet, and OC-3

Data Rate With Autorate Detection

Transceiver and Repeater Functions in a

Single Chip Through Configuration Pins

Interface

Optical Modules

Serial Interface With Programmable

De-Emphasis for the Serial Output

PECL-Compatible Interface

150 mV Minimum

LVDS Interface

Design

description

The SLK2721 device is a single chip, multirate transceiver that derives high-speed timing signals for SONET/

SDH-based equipment. The device performs clock and data recovery, serial-to-parallel/parallel-to-serial

conversion, and a 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 rate 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 SLK2721 device accepts 4-bit LVDS parallel data/clock and generates a NRZ SONET/SDH-compliant

signal at the OC-3, OC-12, OC-24, or OC-48 data rate. 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 SLK2721 device supports an FEC data rate up to 2.7 Gbps when configured to operate at the OC-48 data

rate and provided with an external reference clock that is properly scaled.

The SLK2721 device provides a comprehensive suite of built-in tests for self-test purposes including local and

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 SLK2721 device is very power efficient, dissipating less than 900 mW at 2.488 Gbps, the

OC-48 data rate. It is characterised for operation from −40

°C to 85°C.

AVAILABLE OPTIONS

PACKAGE

TA

PowerPAD QUAD

(PZP)

−40

°C to 85°C

SLK2721IPZP

Copyright

 2002, 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.