12.5Gbps, CML, 2 x 2 Crosspoint Switch

Low-Power, 12.5Gbps, CML, 2 x 2 Crosspoint Switch IC

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The MAX3841 is a low-power, 12.5Gbps, 2 x 2 crosspoint switch IC for high-speed serial data loopback, redundancy, and switching applications. The MAX3841 current-mode logic (CML) inputs and outputs have isolated VCC connections to enable DC-coupled interfaces to 1.8V, 2.5V, or 3.3V CML ICs. Fully differential signal paths and Maxim's second-generation SiGe technology provide optimum signal integrity, minimizing jitter, crosstalk, and signal skew. The MAX3841 is ideal for serial OC-192 and 10GbE optical module, line card, switch fabric, and similar applications.

The MAX3841 has 150mVP-P minimum differential input sensitivity and 500mVP-P nominal differential output swing. Unused outputs can be powered down individually to conserve power. In addition to functioning as a 2 x 2 switch, the MAX3841 can be configured as a 2:1 multiplexer, 1:2 buffer, or dual 1:1 buffer. The MAX3841 is available in a 4mm x 4mm 24-pin thin QFN package, and consumes only 215mW with both outputs enabled.
MAX3841: Typical Application Circuit MAX3841: Typical Application Circuit Enlarge+

Key Features

  • Up to 12.5Gbps Operation
  • Less Than 10psP-P Deterministic Jitter
  • Less Than 0.7psRMS Random Jitter
  • 1.8V, 2.5V, and 3.3V DC-Coupled CML I/O
  • Independent Output Power-Down
  • 4mm x 4mm Thin QFN Package
  • -40°C to +85°C Operation
  • +3.3V Core Supply
  • 215mW Power Consumption (Excluding Termination Currents)


  • Clock Fanout
  • OC-192, 10GbE Optical Modules
  • OC-192, 10GbE Switch/Line Cards
  • System Redundancy/Self Test

MAX3841EVKIT: Evaluation Kit for the MAX3841
Product Reliability Reports: MAX3841.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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