The FOD3120SD with Logic Output Opto-Couplers is a single-channel DC input, push-pull logic-output optocoupler that has been manufactured by ON Semiconductor. The device features high noise suppression, isolation, and a wide power supply range. It is a 4-pin DIP package, comprising of an LED emitter and a logic-output source, which has a minimum isolation voltage of 3.75KV. The device is suitable for use in off-line switching, motor control, and AC line voltage sensing applications.