_________________General Description

The MAX3680/MAX3680A deserializer is ideal for con-

verting 622Mbps serial data to 8-bit-wide, 77Mbps par-

allel data in ATM and SDH/SONET applications.

Operating from a single +3.3V supply, this device

accepts PECL serial clock and data inputs, and deliv-

ers TTL clock and data outputs. The MAX3680 also pro-

vides a TTL synchronization input that enables data

realignment and reframing.

The MAX3680/MAX3680A is available in the extended-

industrial temperature range (-40°C to +85°C), in a 28-

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 77Mbps Parallel Conversion

♦♦ 165mW Power

♦♦ Synchronization Input for Data Realignment and

Reframing (MAX3680)

♦♦ Differential 3.3V PECL Clock and Data Inputs

♦♦ TTL Data Outputs

+3.3V, 622Mbps, SDH/SONET

1:8 Deserializer with TTL Outputs

________________________________________________________________

Maxim Integrated Products

1

MAX3675

MAX3664

MAX3680/

MAX3680A

DATA

AND

CLOCK

RECOVERY

OVERHEAD

TERMINATION

LIMITING

AMP

PREAMP

100

Ω

PHOTODIODE

SD+

SD-

Ω.

GND

130

Ω

130

Ω

82

Ω

82

Ω

130

Ω

130

Ω

82

Ω

82

Ω

SCLK+

SCLK-

SYNC

PCLK

PD7

PD6

PD5

PD4

PD3

PD2

PD1

PD0

___________________________________________________________________Typical Operating Circuit

19-1210; Rev 3; 3/07

________________Ordering Information

Pin Configuration appears at end of data sheet.

EVALUATION

KIT

AVAILABLE

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.

+

Denotes lead-free package.

PART

TEMP RANGE

PIN-PACKAGE

MAX3680EAI

-40

°C to +85°C

28 SSOP

MAX3680EAI+

-40

°C to +85°C

28 SSOP

MAX3680AEAI

-40

°C to +85°C

28 SSOP