The 62A01-01-P is a 1/2" package optical encoder manufactured by Grayhill, designed to provide rotational position feedback with quadrature 2-bit code output and an optional shaft-actuated pushbutton switch. It operates at 5.0±0.25 Vdc with a maximum supply current of 30 mA, featuring push-pull outputs compatible with CMOS, TTL, and HMOS logic levels. The encoder uses optically-coupled phototransistor and infrared emitter technology for reliable operation over more than one million cycles, with logic output characteristics including a minimum logic high voltage of 4.5 Vdc and maximum logic low voltage of 0.5 Vdc. The device is constructed with thermoplastic housing, stainless steel pushbutton dome, and planar silicon NPN phototransistor, available with various cable lengths and terminations. This encoder is ideal for applications requiring economical, long-life rotational sensing in consumer and industrial control systems.