2.75Gbps Dual Mux/Buffer

Provides Redundancy for Serial Data Up to 2.7Gbps

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The MAX3781 is a 2.75Gbps dual multiplexer (mux) and buffer. Each half of the MAX3781 has a transmitter with a fanout of two and a receiver with a 2:1 mux.

Operating from a single +3.3V supply, this device accepts CML or AC-coupled PECL inputs and provides CML outputs. The outputs can be AC-coupled for compatibility with PECL inputs if needed. The MAX3781 is packaged in a compact 48-pin 7x7mm TQFP exposed-paddle package and typically consumes 1.2W power. A power-saving mode disables the unused buffer output and reduces typical power to 0.9W.
MAX3781: Typical Application Circuit MAX3781: Typical Application Circuit Enlarge+

Key Features

  • 11ps Deterministic Jitter
  • On-Chip Termination Resistors Compatible with 50Ω Transmission Lines at All Ports
  • 1.2W Power Consumption
    (0.9W in Power-Saving Mode)
  • +3.3V Power Supply
  • Two-Port Integration


  • 2.75Gbps Serial Communications
  • Serial Backplane Redundancy
  • System Interconnect Redundancy
Product Reliability Reports: MAX3781.pdf 
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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