APS12800: 2-Wire Hall Effect Latch Family with Advanced Diagnostics

Allegro LH-UA Packaging


Top Features

The APS12800 device is a two-wire planar Hall-effect latch integrated circuit family developed in accordance with ISO 26262:2011. It includes internal diagnostics and a safe state that support a functional safety level of ASIL B when integrated and used in conjunction with the appropriate system-level controls. The enhanced 2-wire interface provides interconnect open/short diagnostics and a Safe State to communicate diagnostic information while maintaining compatibility with legacy two-wire systems.

The continuous background diagnostics are transparent to the host system and results in a reduced Fault Tolerant Time. The APS12800 product options include magnetic switching mode (N/S/Omni), magnetic switchpoints, temperature coefficient, and output polarity The temperature coefficient response can be matched to SmCo, NdFeB, or low-cost ferrite magnets. For situations where a functionally equivalent two-wire switch device is preferred, please refer to the APS11800. 

APS12800 sensors are engineered to operate in the harshest environments with minimal external components. They are qualified beyond the requirements of AEC-Q100 Grade 0 and will survive extended operation at 175°C junction temperature. These monolithic ICs include on-chip reverse-battery protection, overvoltage protection (40 V load dump), ESD protection, over-temperature detection, and an internal voltage regulator for operation directly from an automotive battery bus.  These integrated features reduce the end-product Bill-of-Materials (BOM) and assembly cost.

  • ASIL-B
  • Several magnetic switchpoints and switching behavior options
  • Wide supply voltage range 3-24 V
  •  AEC-Q100
  • TJ up to 175C
  • ±8 kV ESD Rating (HBM)
  • 40 V Load Dump compliance

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check Stock
APS12800LLHALT-0H1A 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Distributor Stock
APS12800LLHALX-0H1A 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Distributor Stock
APS12800LUAATN-0H1A 3-lead SIP -40°C to 150°C -- View Data Contact your
local sales rep
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Allegro LH-UA Packaging


Package options include industry-standard surface mount SOT, (LH) and throughole SIP, (UA) packages. All packages are RoHS-compliant and lead (Pb) free with 100% matte-tin-plated leadframes.

LH Package Documentation

UA Package Documentation