Maxim Integrated (MAX3646ETG+T) Laser Diode Driver, SFP/SFF Optical Modules

Product OverviewThe MAX3646ETG+T is a 155Mbps to 622Mbps SFF/SFP laser driver with extinctionratio control in 24 pin TQFN package. The MAX3646 is a +3.3V laser driverdesigned for multirate transceiver module with data rates from 155Mbps to622Mbps. Lasers can be DC-coupled to the MAX3646 for reduced component count andease of multirate operation. Laser extinction ratio control combines thefeatures of automatic power control, modulation compensation and built-inthermal compensation. The APC loop maintains constant average optical power.Modulation compensation increases the modulation current in proportion to thebias current. These control loops, combined with thermal compensation, maintaina constant optical extinction ratio over temperature and lifetime. It acceptsdifferential data input signals. External resistors set the required lasercurrent levels. It provides transmit disable control (TX_DISABLE), single-pointfault tolerance, bias-current monitoring and photocurrent monitoring.Power-supply current is 47mAOperating temperature range from -40°C to 85°CModulation current is 85mABias current is 100mALatched failure output (TX_FAULT) to indicate faultsCompliant with the SFF-8472 transmitter diagnostic and SFP MSA timingrequirementsOn-chip temperature compensationSelf-biased inputs for AC-couplingGround referenced current monitorsProduct InformationLaser Driver Type: SFP / SFF Optical ModulesDriver Case Style: TQFNNo. of Pins: 24PinsSupply Voltage Min: -Supply Voltage Max: 3.3VProduct Range: -MSL: MSL 1 - Unlimited