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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. The MAX3270 has differential ECL input and output interfaces, so it is less susceptible to noise in a high-frequency environment. The fully integrated PLL includes an integrated phase-frequency detector that eliminates the need for external references. Applications 155Mbps (STM-1/OC-3) SDH/SONET Transmission Systems 155Mbps/622Mbps ATM/SONET Access Nodes 622Mbps (STM-4/OC-12) SDH/SONET Transmission Systems Add/Drop Multiplexers Cross-Connects

CLOCK RECOVERY AND DATA RETIMING