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MAX3681EAG

+3.3V, 622Mbps, SDH/SONET 1:4 Deserializer with LVDS Outputs

Maxim Integrated 

19-1091; Rev 1; 5/04

EVAALVUAAILTAIOBNLEKIT

+3.3V, 622Mbps, SDH/SONET

1:4 Deserializer with LVDS Outputs

_________________General Description

The MAX3681 deserializer is ideal for converting

622Mbps serial data to 4-bit-wide, 155Mbps parallel

data in ATM and SDH/SONET applications. Operating

from a single +3.3V supply, this device accepts PECL

serial clock and data inputs, and delivers low-voltage

differential-signal (LVDS) clock and data outputs for

interfacing with high-speed digital circuitry. It also pro-

vides an LVDS synchronization input that enables data

realignment and reframing.

The MAX3681 is available in the extended-industrial

temperature range (-40°C to +85°C), in a 24-pin SSOP

package.

__________________________Applications

622Mbps SDH/SONET Transmission Systems

622Mbps ATM/SONET Access Nodes

Add/Drop Multiplexers

Digital Cross Connects

______________________________Features

♦ Single +3.3V Supply

♦ 622Mbps Serial to 155Mbps Parallel Conversion

♦ 265mW Power

♦ LVDS Data Outputs and Synchronization Inputs

♦ Synchronization Input for Data Realignment and

Reframing

♦ Differential 3.3V PECL Clock and Data Inputs

________________Ordering Information

PART

TEMP RANGE

MAX3681EAG

-40°C to +85°C

MAX3681EAG+ -40°C to +85°C

+Denotes Lead Free Package

PIN-PACKAGE

24 SSOP

24 SSOP

Pin Configuration appears at end of data sheet.

___________________________________________________________________Typical Operating Circuit

VCC = +3.3V

PHOTODIODE

VCC = +3.3V

MAX3675

PREAMP

MAX3664

100Ω LIMITING

AMP

DATA

AND

CLOCK

RECOVERY

VCC

PD3+

VCC = +3.3V

130Ω

130Ω

MAX3681

SD+

SD-

100Ω*

PD3-

PD2+

100Ω*

PD2-

PD1+

82Ω

82Ω

100Ω*

PD1-

VCC = +3.3V

130Ω

130Ω

PD0+

100Ω*

PD0-

SCLK+

SCLK-

82Ω

82Ω

PCLK+

100Ω*

PCLK-

OVERHEAD

TERMINATION

*REQUIRED ONLY IF OVERHEAD CIRCUIT DOES NOT INCLUDE INTERNAL INPUT TERMINATION.

THIS SYMBOL REPRESENTS A TRANSMISSION LINE OF CHARACTERISTIC IMPEDANCE Z0 = 50Ω.

SYNC+

GND SYNC-

________________________________________________________________ Maxim Integrated Products 1

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.

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