OH137 Unipolar Hall effect IC

Part No: OH137
Function: Unipolar
Operating voltage: 4.5-24V
Output Current: 25mA
Operating Point (Bop): <18mT
Release Point(Brp): >2mT
Operating Temp: -40~ 85℃
Package: TO92S

Download OH137 datasheet

SKU: 100,000 Category:


OH137 Unipolar hall effect sensor IC is internally consisted by reverse voltage protection device, voltage regulator, hall voltage generator, a differential amplifier, Schmitt trigger and the open collector output level. 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.


  • 4.5V to 24V DC operation voltage
  • Open-Collector pre-driver
  • 25mA maximum sinking output current.
  • Reverse Polarity Protection


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

Electrical Characteristics (Ta= 25°C)

Parameter Symbol Conditions Value Unit
Min Typ Max
Supply Voltage VCC 4.5 24 V
Output Saturation Voltage VOL Vcc=5V, RL=1KΩ,B≥BOP 200 400 mV
Output Leakage Current IOH Vout=Vccmax,B≤BRP 1.0 10 μA
Supply Current ICC VCC=Vccmax OC output 3 5 mA
Output Rise Time tr Vcc=5V, RL=1kΩ, CL=20pF 0.12 1.20 μS
Output Falling Time tf 0.14 1.40 μS


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

Parameter symbol Value Unit
Min Typ Max
Operate Point BOP 18 mT
Release Point BRP 2 mT
Hysteresis BH 7 mT


Datasheet: OH137 Unipolar Hall effect IC