Introduction
The HAL 2xy Hall switch family is produced in CMOS technology. The sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an open-drain output transistor. The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Accordingly, the output transistor is switched on or off. In addition the HAL22y sensors features a power-on and undervoltage reset.

FEATUREs
– switching offset compensation
– operates from 3.8 V to 24 V supply voltage (HAL22y
   minimum supply voltage is 4.3 V)
– power-on and undervoltage reset in case of HAL22y
– operates with static magnetic fields and dynamic
   magnetic fields up to 10 kHz
– overvoltage protection at all pins
– reverse-voltage protection at VDD-pin
– magnetic characteristics are robust against
   mechanical stress effects
– short-circuit protected open-drain output by thermal
   shut down
– constant switching points over a wide supply 
   voltage and temperature range
– the decrease of magnetic flux density caused by
   rising temperature in the sensor system is compensated 
   by a built-in negative temperature coefficient
   of the magnetic characteristics
– superior temperature stability for automotive or
   industrial applications
– high ESD rating
– EMC corresponding to ISO 7637