+3.3V, 2.5Gbps SDH/SONET Laser Driver with Current Monitors and APC

High-Performance, Full-Featured Laser Driver

Please check latest availability status for a specific part variant.


The MAX3869 is a complete, single +3.3V laser driver for SDH/SONET applications up to 2.5Gbps. The device accepts differential PECL data and clock inputs and provides bias and modulation currents for driving a laser. A synchronizing input latch can be used (if a clock signal is available) to reduce jitter.

An automatic power control (APC) feedback loop is incorporated to maintain a constant average optical power over temperature and lifetime. The wide modulation current range of 5mA to 60mA and bias current of 1mA to 100mA are easy to program, making this product ideal for use in various SDH/SONET applications.

The MAX3869 also provides enable control, two current monitors that are directly proportional to the laser bias and modulation currents, and a failure-monitor output to indicate when the APC loop is unable to maintain the average optical power. The MAX3869 is available in 32-pin TQFP and small 32-pin QFN packages as well as dice.
MAX3869: Typical Application Circuit MAX3869: Typical Application Circuit Enlarge+

Key Features

  • Single +3.3V or +5V Power Supply
  • 64mA Supply Current at +3.3V
  • Programmable Bias Current from 1mA to 100mA
  • Programmable Modulation Current from 5mA to 60mA
  • Bias Current and Modulation Current Monitors
  • 87ps Rise/Fall Time
  • Automatic Average Power Control with Failure Monitor
  • Complies with ANSI, ITU, and Bellcore SDH/SONET Specifications
  • Enable Control


  • 2.5Gbps Optical Transmitters
  • Add/Drop Multiplexers
  • Digital Cross-Connects
  • Section Regenerators
  • SONET/SDH Transmission Systems

See parametric specs for Laser Drivers (21)

Part NumberTarget Oper. Range
Data Rate
Data Rate
minmaxtypmaxmaxSee Notes
MAX3869 1 to 4.51552488
$13.03 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX3869EVKIT: Evaluation Kit for the MAX3869
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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