155Mbps/622Mbps Clock Recovery and Data Retiming IC with Fully Integrated Phase Frequency Detector

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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.
MAX3270: Typical Operating Circuit MAX3270: Typical Operating Circuit Enlarge+

Key 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


  • 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
Request Reliability Report for: MAX3270 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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