OH41A Latch Hall effect IC

Part No: OH41A

Function: Latch

Operating voltage: 4.5-24V

Output Current: 25mA

Operating Point (Bop): <6mT

Release Point(Brp): >-6mT

Operating Temp: -40~ 150℃

Package: TO-92S


OH41A Hall effect Latch Switch IC is composed of a reverse protector, voltage regulator, Hall voltage generator, differential amplifier, Schmitt trigger and an open-collector output on a single silicon chip. It can convert the magnetic field signal into digital voltage output, in response to N and S alternating magnetic field.


  • Non-contact switch
  • Speed measurement
  • Position detection
  • Brushless DC motor


  • High reliability
  • good temperature performance
  • anti-environmental stress
  • Reverse Polarity Protection

Absolute Maximum Ratings (TA=25℃)

Supply Voltage VCC··············4.5-24V    Operating Temperature Range TA ···············-40~150℃

Output Current IO···················25mA      Storage Temperature RangeTS ················-65~150℃

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 0.1 10 μA
Supply Current ICC VCC=Vccmax OC output 4 mA
Output Rise Time tr Vcc=5V,RL=1KΩ, CL=20pF 0.3 μS
Output Falling Time tf 0.3 μS


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

Parameter symbol Value Unit
Min Typ Max
Operate Point BOP 4 mT
Release Point BRP -4 mT
Hysteresis BH 8 mT

Datasheet: OH41A Latch Hall IC