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