MAX3643

EVALUATION KIT AVAILABLE MAX3643 155Mbps to 2.5Gbps Burst-Mode Laser Driver General Description The MAX3643 burst-mode laser driver provides bias and modulation current drive for PON burst-mode ONT applications. It is specifically designed for use with a low-cost external controller for the APC (and if desired, AMC) loop. A high-speed differential burst-enable input enables the driver to switch the laser from a dark (output off) condition to full on-condition in less than 2ns. When BEN is inactive, typical modulation and bias currents are 5µA each. Laser modulation current can be set from 10mA to 85mA and bias current can be set from 1mA to 70mA using the MODSET and BIASSET inputs. A sample-andhold circuit is provided to capture the monitor diode output during short PON bursts, if needed, and the BEN high-speed signal is mirrored on an LVCMOS output to be used by the controller operating the APC/AMC loop. The MAX3643 burst-mode laser driver is packaged in a 4mm x 4mm, 24-pin thin QFN package. It operates from -40°C to +85°C. Applications A/B/G/XGPON ONT Modules Up to 2.5Gbps 1.25Gbps IEEE EPON ONT Modules Features ♦ 10mA to 85mA Modulation Current ♦ 1mA to 70mA Bias Current ♦ Monitor Diode Sample and Hold ♦ 45ps Output Transition Time ♦ 2ns Turn-On/-Off Time ♦ Reference Voltage Generator ♦ LVPECL High-Speed Inputs (Data, Burst Enable) Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3643ETG -40°C to +85°C 24 TQFN-EP* MAX3643ETG+ -40°C to +85°C 24 TQFN-EP* +Denot...