Allegro MicroSystems Inc. Two-Wire Unipolar Vertical Hall-Effect Switch With Advanced Diagnostics A1131ELHLX-T

The A1131ELHLX-T is a discontinued two-wire unipolar vertical Hall-effect switch with advanced diagnostics, designed for automotive applications including electronic power steering index sensing and hood/trunk latches. It is housed in a 3-pin SOT23W surface-mount package and operates with a junction temperature up to 165°C. The device is compliant with ISO 26262:2011, achieving ASIL B as a stand-alone component, and is qualified to AEC-Q100 with protection against reverse battery, overvoltage, and 40 V load dump events. Supply current during high output state is 5.9 mA at 14.3 V with an operating ambient temperature range of -40 to 85°C. Output current during low state is 10.7 mA. The sensor operates down to 3 V and features integrated diagnostics for internal subsystems. Magnetic sensing is parallel to the package surface. The part is RoHS-compliant and lead-free.