The HY6110 is used in applications that require digital, high speed current modulation of the laser diode. The HY6110 input is ECL compatible and is terminated into 50. The HY6110 uses a GaAsFET current switch that drives a laser diode with modulation currents of up to 200mA peak-to-peak. Two programmable current sources allow user selectability of the bias and modulation currents. The pre-bias current is selectable from zero to 40mA. The Modulation current is selectable from zero to 200mA. These selected currents modulate the laser beam at the input frequency. The HY6110 comes in a hermetic metal package.