intersil X9521 Manual

The X9521 is a chip with features of a digitally controlled potentiometer (DCP), EEPROM memory, and fiber optic module control. It has high resolution and non-volatile characteristics, and can be controlled through a 2-wire serial interface. The X9521 can be used to control the bias and modulation currents of the laser diode in a fiber optic module, and can store module definition data.