Two-Wire Hall-Effect Switches

Two-Wire Hall-effect switches are most commonly used in sensing absolute position or proximity. They are referred to Two-Wire because they utilize two pins: Supply and ground. The output signal is a modulation of the supply current. This current interface can be used to easily diagnose interconnect failures. These contactless sensing solutions require few external components and can withstand the hostile operating conditions of automotive applications. Typical applications include: seat belt buckles, seat track, occupant sensor, appliances, and other applications looking to reduce system wiring.


Specific advantages of Allegro’s solutions include:

  • ISO26262 compliance for automotive safety systems 
  • 4× chopper stabilization for superior temperature stability and resistance to physical stress
  • Industry-leading ESD and EMC performance
  • Low-voltage (3 V) operation
  • Key performance characteristics specified over the full operating voltage and ambient temperature ranges
  • Designed to survive harsh automotive environments

Allegro has a broad range of devices sensitivities that cover just about any application requirement.

Solutions using temperature switches, Hall-effect switches, and magnetic sensor IC switches



 See All Our Magnetic Digital Position Sensor ICs Here.


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