MAX3869EHJ+

The MAX3869EHJ+ is a +3.3V, 2.5Gbps SDH/SONET laser driver with current monitor and APC in 32 pin TQFP package. The 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.