___________________________________________________ Typical Operating Circuit

_____________________General Description

The MAX3675 is a complete clock-recovery and data-

retiming IC incorporating a limiting amplifier. It is

intended for 622Mbps SDH/SONET applications and

operates from a single +3.3V supply.

The MAX3675 has two differential input amplifiers: one

accepts PECL levels, while the other accepts small-sig-

nal analog levels. The analog inputs access the limiting

amplifier stage, which provides both a received-signal-

strength indicator (RSSI) and a programmable-threshold

loss-of-power (LOP) monitor. Selecting the PECL amplifier

disables the limiting amplifier, conserving power. A loss-

of-lock (LOL) monitor is also incorporated as part of the

fully integrated PLL.

________________________Applications

SDH/SONET Transmission Systems

SDH/SONET Access Nodes

Add/Drop Multiplexers

ATM Switches

Digital Cross-Connects

____________________________Features

o Single +3.3V or +5.0V Power Supply

o Complies with ANSI, ITU, and Bellcore

SDH/SONET Specifications

o Low Power: 215mW at +3.3V

o Selectable Data Inputs, Differential PECL or

Analog

o Received-Signal-Strength Indicator (RSSI)

o Loss-of-Power and Loss-of-Lock Monitors

o Differential PECL Clock and Data Outputs

o No External Reference Clock Required

622Mbps, Low-Power, 3.3V Clock-Recovery

and Data-Retiming IC with Limiting Amplifier

________________________________________________________________

Maxim Integrated Products

1

100

Ω

100k

INREF

FILT

OUT+

0.01

µF

0.01

µF

33nF

47nF

+3.3V

220pF

100pF

PHOTO-

DIODE

ADI+

DDI-

DDI+

SDO+

SDO-

0.1

µF

0.01

µF

0.01

µF

ADI-

CFILT OLC+ OLC-

R1

R2

GND

RSSI

INV

VTH LOP

LOL

INSEL

PHADJ+ PHADJ- FIL+

52.3

Ω

1%

2.2

µF

FIL-

OUT-

GND

COMP

IN

+3.3V

SCLKO+

SCLKO-

+3.3V

+3.3V

82

Ω

82

Ω

130

Ω

130

Ω

+3.3V

82

Ω

82

Ω

130

Ω

130

Ω

MAX3675

MAX3664

19-1258; Rev 2; 11/98

PART

MAX3675ECJ

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

32 TQFP

_________________Ordering Information

Pin Configuration appears at end of data sheet.

*Contact factory for availability. Dice are designed to operate

from -40°C to +85°C, but are tested and guaranteed only at

Tj = +45°C.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

EVALUATION

KIT MANUAL

AVAILABLE

MAX3675EHJ

-40°C to +85°C

5mm 32 TQFP

MAX3675E/D

-40°C to +85°C

Dice*