2.5Gbps, Low-Power, +3.3V Clock Recovery and Data Retiming IC

The Low-Power Way to Receive Clean 2.5Gbps Signals

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The MAX3875A is a compact, low-power clock recovery and data retiming IC for 2.488Gbps SDH/SONET applications. The fully integrated phase-locked loop recovers a synchronous clock signal from the serial NRZ data input, which is retimed by the recovered clock. Differential PECL-compatible outputs are provided for both clock and data signals, and an additional 2.488Gbps serial input is available for system loopback diagnostic testing. The device also includes a TTL-compatible loss-of-lock (LOL-bar) monitor.

The MAX3875A is designed for both section-regenerator and terminal-receiver applications in OC-48/STM-16 transmission systems. Its jitter performance exceeds all of the SONET/SDH specifications.

This device operates from a single +3.3V to +5.0V supply over a -40°C to +85°C temperature range. The typical power consumption is only 400mW with a +3.3V supply. It is available in a 32-pin TQFP package, as well as in die form.

Key Features

  • Exceeds ANSI, ITU, and Bellcore SONET/SDH Regenerator Specifications
  • 400mW Power Dissipation (at +3.3V)
  • Clock Jitter Generation: 0.003UIRMS
  • Single +3.3V or +5V Power Supply
  • Fully Integrated Clock Recovery and Data Retiming
  • Additional High-Speed Input Facilitates System Loopback Diagnostic Testing
  • Tolerates >2000 Consecutive Identical Digits
  • Loss-of-Lock Indicator
  • Differential PECL-Compatible Data and Clock Outputs


  • 2.488Gbps ATM Receivers
  • Add/Drop Multiplexers
  • Digital Cross-Connects
  • Digital Video Transmission
  • SDH/SONET Receivers and Regenerators
  • SDH/SONET Test Equipment

Quality and Environmental Data

Request Reliability Report for: MAX3875A 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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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