OH44L Unipolar Hall IC for high temperature

Part No: OH44L

Function: Unipolar

Operating voltage: 4-30V

Output Current: 50mA

Operating Point (Bop): <12mT

Release Point(Brp): >3mT

Operating Temp: -40~ 150℃

Package: TO92S


OH44L unipolar hall IC includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, a schmitt trigger to provide switching hysteresis for noise rejection, and an open-collector output. While the magnetic flux density (B) is larger than threshold Bop, the OUT pin turns on (low). When B < Brp, the OUT pin go into “off ” state.


  • High load capacity
  • The good consistency
  • A wide range of power supply voltage
  • High reliability


  • The brushless DC motor, DC fans, DC water pump
  • The home appliance control panel
  • Sewing equipment, textile machinery
  • Speed sensor, position detecting, counting
  • The flow sensor, flow meter
  • The autoignition, safety alarm device
  • other industrial control fields

Absolute Maximum Ratings (TA=25℃)

Supply Voltage VCC··············4-30V

Output Current IO·················50mA

Operating Temperature Range TA ········-40~150℃

Storage Temperature RangeTS ················-65~150℃

Electrical Characteristics (Ta= 25°C)

Parameter Symbol Conditions Value Unit
Min Typ Max
Supply Voltage VCC   4 30 V
Output Saturation Voltage VOL VCC=5V,  RL=1KΩ,  B≥BOP 200 400 mV
Output Leakage Current IOH Vo=Vccmax , B≤BRP 1.0 10 μA
Supply Current ICC Vo=Vccmax , B≤BRP 5 mA
Output Rise Time tr Vcc=5V, RL=1KΩ, CL=20pF 0.5 μS
Output Falling Time tf 0.5 μS


Magnetic Characteristics (Ta= 25°C) (1mT = 10 Gauss)

Parameter symbol Value Unit
Min Typ Max
Operate Point BOP 12 mT
Release Point BRP 3 mT
Hysteresis BH 3 5 mT

OH44L Unipolar hall IC