_______________General Description

The MAX3691 serializer is ideal for converting 4-bit-

wide, 155Mbps parallel data to 622Mbps serial data in

ATM and SDH/SONET applications. Operating from a

single +3.3V supply, this device accepts low-voltage

differential-signal (LVDS) clock and data inputs for

interfacing with high-speed digital circuitry, and deliv-

ers a 3.3V PECL serial-data output. A fully integrated

PLL synthesizes an internal 622Mbps serial clock from

a 155.52MHz reference clock.

The MAX3691 is available in the extended-industrial

temperature range (-40°C to +85°C), in a 32-pin TQFP

package.

________________________Applications

622Mbps SDH/SONET Transmission Systems

622Mbps ATM/SONET Access Nodes

Add/Drop Multiplexers

Digital Cross Connects

____________________________Features

o Single +3.3V Supply

o 155Mbps Parallel to 622Mbps Serial Conversion

o 215mW Power

o LVDS Parallel Clock and Data Inputs

o Differential 3.3V PECL Serial-Data Output

+3.3V, 622Mbps, SDH/SONET 4:1 Serializer

with Clock Synthesis and LVDS Inputs

________________________________________________________________

Maxim Integrated Products

1

MAX3691

MAX3667

SD-

PCLKO- PCLKO+

LVDS CRYSTAL REFERENCE

PCLKI- PCLKI+ RCLK-

0.1µF

0.1µF

GND

SD+

FIL-

FIL+

130

Ω

130

Ω

82

Ω

1.5k

100pF

24.9k

82

Ω

OVERHEAD

GENERATION

PD3-

PD3+

PD2-

PD2+

PD1-

PD1+

PD0-

PD0+

THIS SYMBOL REPRESENTS A TRANSMISSION LINE

RCLK+

___________________________________________________Typical Operating Circuit

19-1207; Rev 0; 3/97

PART

MAX3691ECJ

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

32 TQFP

______________Ordering Information

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

Pin Configuration appears at end of data sheet.

EVALUATION

KIT

AVAILABLE