The BU52097GWZ-E2: The BU52097GWZ-: The ROHM BU52097GWZ- is an omnipolar Hall-effect magnetic switch that responds to both north and south poles, with a typical trip point of ±17 mT and release at ±12.1 mT. This means a single magnet orientation works for lid-close detection, rotation sensing, or proximity triggers — no need to align pole direction on the assembly line. The CMOS output swings rail-to-rail and sinks or sources up to 500 µA, enough to drive a GPIO or a small load directly. Maximum quiescent supply current is just 8 µA, making this a candidate for always-on sensing in battery-operated devices like portable electronics, IoT endpoints, and wearable accessories.
Package reality: 4-bump CSPBGA
The BU52097GWZ- comes in a 4-XFBGA / CSPBGA package — essentially four solder bumps on a 0.5 mm or finer pitch. This is a tiny footprint (roughly 0.9 mm x 0.9 mm body) that saves board area but demands X-ray inspection for solder-joint verification and a controlled reflow profile. No exposed pad to stitch; the bumps carry both signal and mechanical attachment. If your rework lab isn't set up for BGA-style parts, factor in the assembly learning curve or a pre-programmed pick-and-place service.
ROHM lists the BU52097GWZ- as Active in production.