HAL574SF-K Unipolar, Medium Sensitivity SOT89

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Contact Symmetry For Lead Time
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Product Information

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The HAL 5xy family consists of different Hall switches produced in CMOS technology. All sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an open-drain output transistor. The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Accordingly, the output transistor is switched on or off.

The sensors of this family differ in the switching behavior and the switching points.The active offset compensation leads to constant magnetic characteristics over supply voltage and temperature range. In addition, the magnetic parameters are robust against mechanical stress effects. The sensors are designed for industrial and automotive applications and operate with supply voltages from 3.8 V to 24 V in the ambient temperature range from –40 °C up to 150 °C. All sensors are available in the SMD-package SOT89B-1 and in the leaded versions TO92UA-1 and TO92UA-2.

The HAL 5xy sensors are monolithic integrated circuits which switch in response to magnetic fields. If a magnetic field with flux lines perpendicular to the sensitive area is applied to the sensor, the biased Hall plate forces a Hall voltage proportional to this field. The Hall voltage is compared with the actual threshold level in the comparator.

The temperature-dependent bias increases the supply voltage of the Hall plates and adjusts the switching points to the decreasing induction of magnets at higher temperatures. If the magnetic field exceeds the threshold levels, the open drain output switches to the appropriate state. The built-in hysteresis eliminates oscillation and provides switching behavior of the output without bouncing.

Major Applications

• Endposition detection
• RPM measurement of motors in various applications, such as power window
• Brushless DC motors
• RPM measurements in flow meters
• Replacement of micro switches

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized Micronas distributor.


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Switching offset compensation at typically 62 kHz
Operates from 3.8 V to 24 V supply voltage
Overvoltage protection at all pins
Reverse-voltage protection at VDD-pin
Magnetic characteristics are robust regarding mechanical stress effects
Short-circuit protected open-drain output by thermal shut down
Operates with static magnetic fields and dynamic magnetic fields up to 10 kHz
Constant switching points over a wide supply voltage range
The decrease of magnetic flux density caused by rising temperature in the sensor system is compensated by a built-in negative temperature coefficient of the magnetic characteristics
Ideal sensor for applications in extreme automotive and industrial environments
EMC corresponding to ISO 7637
Operates from -40C to 170C junction temperature


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Micronas HAL574SF-K Datasheet
Micronas HAL574SF-K Product Brief
Micronas HAL574SF-K Product Selection Guide
Micronas HAL574SF-K RoHS Certification

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