OH443R Hall Effect Unipolar IC (Low sensitivity)

Part No: OH443R

Function: Unipolar

Operating voltage: 4.5-30V

Output Current: 50mA

Operating Point (Bop): <24mT

Release Point(Brp): >10mT

Operating Temp: -40~ 150℃

Package: TO92S


OH443R includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an open-collector output pre-driver. 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 reliability
  • Low sensitivity
  • good temperature performance
  • anti-environmental stress


  • Speed measurement
  • Home appliances
  • Position detection
  • Flow measurement

Absolute Maximum Ratings (TA=25℃)

Supply Voltage VCC··············4-30V     Operating Temperature Range TA ········-40~150℃

Output Current  IO···················50mA    Storage Temperature RangeTS ················-55~150℃

Electrical Characteristics (Ta= 25°C)

Parameter Symbol Conditions Value Unit
Min Typ Max
Supply Voltage VCC 4 30 V
Output Saturation Voltage VOL Vcc=4.5V, Iout=20mA,B≥BOP 200 400 mV
Output Leakage Current IOH Vout=24V,B≤BRP 1.0 10 μA
Supply Current ICC VCC=Vccmax OC output 5 mA
Output Rise Time tr Vcc=12V, RL=820Ω, CL=20pF 0.2 2.0 μS
Output Falling Time tf 0.18 2.0 μS


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

Parameter symbol Value Unit
Min Typ Max
Operate Point BOP 18 24 mT
Release Point BRP 10 19 mT

OH443R Unipolar hall IC low sensitivity