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.

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)

Applications

   A/B/G/XGPON ONT Modules Up to 2.5Gbps

   1.25Gbps IEEE EPON ONT Modules