OH543 Unipolar Hall effect IC

Part No: OH543

Function: Unipolar

Operating voltage: 4-30V

Output Current: 50mA

Operating Point (Bop): <20mT

Release Point(Brp): >2mT

Operating Temp: -40~ 150℃

Package: SOT89

SKU: 99,000 Categories: ,


OH543 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. It detects the changes of Magnetic field and output a digital voltage signal. With the typical feature of wide range of working Voltage, operate temperature and high load capacity, OH543 performs well in many applications, such as position control, speed detection and flow detection as a non-contact magnetic sensor.


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


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

Absolute Maximum Ratings (TA=25℃)

Supply Voltage VCC··············3.8-30V          Operating Temperature Range TA ········-40~150℃
Output Current IO·················50mA                 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 0.2 0.4 V
Output Leakage Current IOH Vout=Vccmax,B≤BRP 0.1 10 μA
Supply Current ICC VCC=Vccmax OC output 5 mA
Output Rise Time tr Vcc=5V, RL=1kΩ, CL=20pF 0.2 2.0 μS
Output Falling Time tf 0.18 2.0 μS


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

Parameter symbol Value Unit
Min Typ Max
Operate Point BOP 20 mT
Release Point BRP 2 mT
Hysteresis BH 3 6 mT

Datasheet: OH543 Unipolar hall IC