AH1911/AH1921 Omnipolar Hall Effect Switches Diodes Inc. AH1911/AH1921 Omnipolar Hall-Effect Switches include a hibernating clocking system that allows for an average supply current of 1.6μA at 3V. The average supply current makes it compatible with battery-powered consumer products, gas or water meter, smoke detectors, and IoT devices. The wider range of supply voltage (1.6V to 5.5V) extends battery operating time and supports low-voltage-system microcontrollers, which provides flexibility for system design.