HOA901

The HOA901 optical encoder assembly consists of a dual channel IC sensor, and a GaAs IRED (infrared emitting diode) mounted in an opaque plastic housing. The sensor is a monolithic IC, consisting of two narrow adjacent photodiodes, amplifiers, and Schmitt trigger output stages. The NPN collector outputs have internal pull-up to VCC to directly drive TTL loads. Sensitivity compensation circuitry is included (output power versus IRED temperature characteristic).

What comes next is about HOA901 electrical characteristics (at -40 to +85) for the emitter and the coupled. The maximum VF (forward voltage) is 1.5 V at II=20 mA. The IR (reverse current) is 100A at VR=3.0 VDC. The maximum IOP (IRED operating current) is 15 mA at VCC=5.0 VDC.
 
The following is about the electrical characteristics (at -40 to +85) for the sensor HOA901. The maximum ICC (supply current) is 7.0 mA at VCC=5.25 VDC. The minimum VOH (high level output voltage (A and B)) is 4.5 V at VCC=5.0 VDC, IOH=0 mA. The maximum VOL (low level output voltage (A and B)) is 0.4 V at VCC=5.0 VDC, IOL=1.6 mA. The maximum tPLH (propagation delay time Lo-Hi) is 5 sec and the maximum tPHL (propagation delay time Lo-Hi) is 5 sec at VCC=5.0 VDC, RL=390, TA=25. The maximum tr (rise time) is 100 nsec and the maximum tf (fall time) is 100 nsec at VCC=5.0 VDC, RL=390, TA=25.