The AZV5001 is a low power and cost effective headset detection IC with a comparator with internal hysteresis, OR gate, and N−channel MOSFET integrated designed to detect the assertion of a headset with a microphone. Pull−up resistors for the detection pins are internalized, a built in resistor divider provides the reference voltage for detecting the left audio channel. The logic low output of the OR gate indicates the headset has been connected properly.