General Description
The MAX3270 is a complete Clock Recovery and Data Retiming IC for 155Mbps and 622Mbps SDH/SONET and ATM applications. The MAX3270 meets Bellcore and CCITT jitter tolerance specifications ensuring error free data recovery. Recovered clock and data are phase aligned using a fully integrated phase-locked loop (PLL). An output frequency monitor (FM) is included to detect loss of PLL acquisition or a loss of input data.

Features
♦ Supports Both 155Mbps and 622Mbps Clock Recovery and Data Retiming
♦ Fully Integrated Phase/Frequency Detector
♦ Capable of Switching to an External Clock
♦ Differential 100K ECL Data and Clock I/Os
♦ Output Monitor Provides Lock Detection
♦ No External Reference Clock Required

Applications
    155Mbps (STM-1/OC-3)/622Mbps (STM-4/OC-12) SDH/SONET Transmission Systems
    155Mbps/622Mbps ATM/SONET Access Nodes
    Add/Drop Multiplexers
    Cross-Connects