OHS3040U [Optek]

These Hall-effect devices feature logic level output and provide up to 21 mA of sink current, allowing direct driving of more than 7 TTL loads. They operate with a wide supply voltage range from 4.5 V to 24 V and offer excellent temperature stability in harsh environments. The Uni-Polar type turns on with a logic level '0' when a sufficient magnetic field from the south pole approaches and turns off with logic level '1' at a minimum field. The Bi-Polar latch device turns on with a south pole and turns off with a north pole. Output amplitude is constant at switching frequencies from DC to over 200 kHz.