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