General Description

The MAX3690 serializer is ideal for converting 8-bit-wide, 77Mbps parallel data to 622Mbps serial data in ATM and SDH/SONET applications. Operating from a single +3.3V supply, this device accepts TTL clock and data inputs, and delivers a 3.3V differential PECL serial data output. A fully integrated PLL synthesizes an internal 622MHz serial clock from a low-speed crystal reference clock (77.76MHz, 51.84MHz, or 38.88MHz).

The MAX3690 is available in the extended-industrial temperature range (-40°C to +85°C) in a 32-pin TQFP package.

Features

♦ Selectable Reference Clock Frequency: 77.76MHz, 51.84MHz, or 38.88MHz

♦ Single +3.3V Supply

♦ 77Mbps (8-bit) Parallel to 622Mbps Serial Conversion

♦ Clock Synthesis for 622Mbps Serial Data

♦ 200mW Power

♦ TTL Parallel Clock and Data Inputs

♦ Differential 3.3V PECL Serial-Data Output

Applications

   622Mbps SDH/SONET Transmission Systems

   622Mbps ATM/SONET Access Nodes

   Add/Drop Multiplexers

   Digital Cross Connects