The X9523 is an Intersil device released for laser diode control in fiber optic modules. The device has two digitally controlled potentiometers (DCPs), V1/Vcc power-on reset (POR) circuitry, two programmable voltage monitor inputs, and software and hardware indicators. All X9523 functions can be accessed via an industry standard 2-wire serial interface. The DCPs of the X9523 can be used to control the bias and modulation currents of the laser diode in a Fiber Optic module. The programmable POR circuit can be used to ensure that V1/Vcc is stable before power is applied to the laser diode.
