The A1244 is a two-wire Hall-effect latch. These devices go through Allegro®Advanced BiCMOS wafer fabrication process, manufactured using its proprietary high-frequency four-phase chopper stabilization technology. This technology provides magnetic stability relative to all operating temperatures and eliminates the inherent offset of single-Hall element devices for harsh application environments.
Because two-wire latches use one less wire than traditional open-collector output switches, two-wire latches are particularly suitable for cost-sensitive applications. Moreover, the system designer always has diagnostic information because the output current must always be within two narrow ranges. Any current level that is not in these two ranges indicates a fault.
Hall-effect latches will be in a high output current state in the presence of a strong South polar magnetic field and will remain so until a strong North Pole magnetic field is present.
The device is available in two package types. LH is a SOT-23W miniature low profile package for surface mount applications. UA is a three-pin ultra-small single in-line package (SIP) for via mounting. Both packages are lead (Pb) free and feature 100% matte tin coated leadframes.
- High-speed four-phase stable choppering
- Low switchpoint drift over all temperature ranges
- Low sensitivity to thermal and mechanical stress
- Chip protection
- Power transient protection
- Reverse battery protection
- On-board voltage regulator
- 3.0 to 24 volts operating voltage
- Solid-state reliability
- Powerful EMC and ESD performance
- Get industry-leading ISO 7637-2 performance with a proprietary 40-V clamping structure