General Description

The MAX3875A is a compact, low-power clock recov-

ery and data retiming IC for 2.488Gbps SDH/SONET

applications. The fully integrated phase-locked loop

recovers a synchronous clock signal from the serial

NRZ data input, which is retimed by the recovered

clock. Differential PECL-compatible outputs are provid-

ed for both clock and data signals, and an additional

2.488Gbps serial input is available for system loopback

diagnostic testing. The device also includes a TTL-

compatible loss-of-lock (LOL) monitor.

The MAX3875A is designed for both section-regenerator

and terminal-receiver applications in OC-48/STM-16

transmission systems. Its jitter performance exceeds all

of the SONET/SDH specifications.

This device operates from a single +3.3V to +5.0V supply

over a -40°C to +85°C temperature range. The typical

power consumption is only 400mW with a +3.3V supply. It is

available in a 32-pin TQFP package, as well as in die form.

Applications

SDH/SONET Receivers and Regenerators

Add/Drop Multiplexers

Digital Cross-Connects

2.488Gbps ATM Receiver

Digital Video Transmission

SDH/SONET Test Equipment

Features

o Exceeds ANSI, ITU, and Bellcore SONET/SDH

Regenerator Specifications

o 400mW Power Dissipation (at +3.3V)

o Single +3.3V or +5V Power Supply

o Fully Integrated Clock Recovery and Data Retiming

o Additional High-Speed Input Facilitates System

Loopback Diagnostic Testing

o Tolerates >2000 Consecutive Identical Digits

o Loss-of-Lock Indicator

o Differential PECL-Compatible Data and Clock

Outputs

2.5Gbps, Low-Power, +3.3V

Clock Recovery and Data Retiming IC

________________________________________________________________ Maxim Integrated Products

1

PRE/POSTAMPLIFIER

PHOTO-

DIODE

+3.3V

SDI-

SDI+

SLBI-

SLBI+

SDO-

SCLKO+

SCLKO-

SDO+

MAX3875A

MAX3866

+3.3V

+3.3V

+3.3V

+3.3V

OUT+

OUT-

TTL

LOP

IN

LOL

PHADJ-

PHADJ+

SIS

FIL+

FIL-

SYSTEM

LOOPBACK

TTL

TTL

1

µF

0.01

µF

0.01

µF

82

Ω

82

Ω

130

Ω

130

Ω

82

Ω

82

Ω

130

Ω

130

Ω

1:16

DESERIALIZER

MAX3885

Typical Application Circuit

19-2362; Rev 1; 3/02

PART

MAX3875AEHJ

-40°C to +85°C

TEMP RANGE

PIN-PACKAGE

32 TQFP

Ordering Information

Pin Configuration appears at end of data sheet.

MAX3875AE/D

-40°C to +85°C

Dice*

* Dice are designed to operate over this range, but are tested

availability.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.