The HOA2001-001 from Honeywell is a transmissive optoschmitt sensor. This device consists of an infrared emitting diode facing an Optoschmitt detector encased in a black thermoplastic housing. The photodetector consists of a photodiode, amplifier, voltage regulator, schmitt trigger and an NPN output transistor with 10Kohm (nominal) pull-up resistor. The buffer logic provides a high output when the optical path is clear and a low output when the path is interrupted.
Direct TTL interface
0.060in (1.52 mm) diameter detector aperture
0.12in (3.05 mm) slot width
0.05in (1.27) offset pin circle detector ends
IR emitter forward voltage is 1.6V at If=20mA
IR emitter reverse leakage current is 10μA at Vr=3V
