The KH2102 is an ultra-sensitivity Hall-effect switch with digital latched output, special designed for battery-operation, handheld equipments etc.

A Chopper stabilized amplifier improves stability of magnetic switch points. Either sufficient south or north pole magnetic field strength will turn the output on. If the magnetic flux density is larger than operating point (BOP), the output will be turned on; if it is less than releasing point (BRP), the output will be turned off. The output structure is an open-drain type with a pull-up resistor to VDD. Such output design allows simple connectivity with TTL or CMOS logic. Moreover, a sleep-awake logic controls the IC in sleep time or awake time. This function will reduce the power dissipation of the IC to some uA.

The KH2102 is available in TO-92S and SOT23-3 packages which are optimized for most applications.