Allegro MicroSystems Inc. 2-Wire Hall Effect Latch Family With Advanced Diagnostics APS12800LLHALT-0H1A

The APS12800LLHALT-0H1A is a two-wire planar Hall-effect latch with integrated ASIL B diagnostics, designed for automotive safety systems. It operates from 3 to 30 V, withstands junction temperatures up to 175°C, and meets AEC-Q100 Grade 0 qualification with ±8 kV HBM ESD protection. The device features an on-chip reverse-battery and overvoltage clamp, eliminates the need for external protection components, and maintains compatibility with legacy two-wire systems. It is housed in a 3-pin SOT23-W surface-mount package and is designed for a magnetic switch threshold of +80 G max and −80 G min, with a current draw of 5 to 6.9 mA in the low state and a flat temperature coefficient. All diagnostic functions are performed continuously and transparently to the host system.