MAX3667

19-1311; Rev 1; 3/98 KIT ATION EVALU LE B A IL A AV +3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power Control ____________________________Features o Single +3.3V or +5.0V Operation o Automatic Average Power Control o Bias Current and Modulation Current Monitor Outputs o TTL-Compatible Disable Input o Temperature-Compensated Reference o PECL-Compatible Data Inputs ________________General Description The MAX3667 is a complete, +3.3V laser driver with automatic power control (APC), designed for SDH/ SONET applications up to 622Mbps. It accepts differential PECL inputs, provides single-ended bias and modulation currents, and operates over a -40°C to +85°C temperature range. A temperature-stabilized reference voltage simplifies laser current programming. It allows external programming of the modulation current between 5mAp-p and 60mAp-p, and of the bias current between 5mA and 90mA. The APC function, which incorporates a monitor photodiode, an external resistor, and two external capacitors, maintains constant laser output power. Two current monitors provide high-speed signals that are directly proportional to the bias and modulation currents. Additional features include disable/enable control and a slow-start feature with a minimum turn-on time of 50ns. The MAX3667 is available in die form and in a 32-pin TQFP package. MAX3667 _______________Ordering Information PART MAX3667ECJ MAX3667E/D TEMP. RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 32 TQFP Dice* *Dice are ...