Omnipolar detection with a single 1.65 V rail
The BU52073GWZ-E2: The BU52073GWZ- is a CMOS-output omnipolar magnetic switch from ROHM Semiconductor, responding to both north and south pole fields above the threshold. The switch trips at ±5.1 mT (typical) and releases at ±2.3 mT (typical), tested at 25°C. The built-in hysteresis prevents output chatter near the threshold — a common concern when the magnetic field drifts with temperature or mechanical play.
Supply current and output drive
The output sinks or sources up to 0.5 mA — enough to drive a logic input, an LED indicator, or a small relay coil through an external transistor. The switching current is listed as 0 A, meaning the device draws negligible supply current in the quiescent state, preserving battery life in portable designs. The CMOS output stage provides rail-to-rail swing, eliminating the need for a pull-up resistor when driving a CMOS logic input. This simplifies the BOM and reduces component count on the PCB.
Temperature range and package options
Lifecycle status is Active per the manufacturer, so the part remains available for new designs and ongoing production without an imminent end-of-life watch.