General Description
The MAX3890 serializer is ideal for converting 16-bit wide, 155Mbps parallel data to 2.5Gbps 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 delivers positive-referenced emitter-coupled logic (PECL) serial data and clock outputs. A fully integrated phaselocked loop (PLL) synthesizes an internal 2.5GHz serial clock from a 155.52MHz, 77.76MHz, 51.84MHz, or 38.88MHz reference clock. A loopback data output is provided to facilitate system diagnostic testing.

Features
♦ Single +3.3V Supply
♦ 495mW Power Consumption
♦ Exceeds ANSI, ITU, and Bellcore Specifications
♦ 155Mbps (16-bit wide) Parallel to 2.5Gbps Serial
   Conversion
♦ Clock Synthesis for 2.5Gbps
♦ Multiple Clock Reference Frequencies
   (155.52MHz, 77.76MHz, 51.84MHz, 38.88MHz)
♦ LVDS Parallel Clock and Data Inputs
♦ Additional High-Speed Output for System
   Loopback Testing

Applications
   2.5Gbps SDH/SONET Transmission Systems
   2.5Gbps ATM/SONET Access Nodes
   Add/Drop Multiplexers
   Digital Cross-Connects
   ATM Backplanes