The GN1157 is a multi-rate transceiver IC designed specifically for datacom and telecom applications. The transmit DFB/FP laser driver is an advanced design that is focused on delivering excellent optical performance while still achieving low power. Programmable equalisation is available to optimise jitter. The Tx output has programmable rise/fall times to allow optimization for different bit rates. The GN1157 features an integrated automatic power control loop that adjusts bias current to compensate for laser aging and environment change. The GN1157 is compatible with an external microcontroller look-up table to control modulation current and extinction ratio over temperature and life.