For Automotive 125°C Operation High-Withstand Voltage High-Speed Unipolar Detection Type Hall Effect Switch IC S-57A1 A Series

Available Applications
Automotive ICs are categorized according to their application. The following symbols indicate the types of applications for which an IC can be used.
Safety critical components typified by engine, transmission, suspension and ABS, and EV/HEV/PHEV related equipment, etc.
Meter, body, headlamp, ITS, etc.
Accessory, car navigation, car audio system, etc.

The S-57A1 A Series, developed by CMOS technology, is a high-accuracy Hall effect switch IC that operates with high temperature and high-withstand voltage.
The output voltage changes when the S-57A1 A Series detects the intensity level of magnetic flux density. Using the S-57A1 A Series with a magnet makes it possible to detect the open / close and rotation state in various devices.
The S-57A1 A Series includes a reverse voltage protection circuit and an output current limit circuit.
High-density mounting is possible by using the small SOT-23-3 package.
Due to its high-accuracy magnetic characteristics, the S-57A1 A Series can make operation’s dispersion in the system combined with magnet smaller.

Related products: High-Speed Bipolar Hall Effect Latch S-57K1 A Series

Caution : This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in the purpose, contact to SII is indispensable.


Pole detection*1
S pole or N pole
Output logic*1
Active “L”, active “H”
Output form*1
Nch open-drain output, Nch driver + built-in pull-up resistor
Magnetic sensitivity*1
Bop = 3.0 mT typ.
Bop = 6.0 mT typ.
Chopping frequency
fc = 250 kHz typ.
Output delay time
td = 16.0 μs typ.
Power supply voltage range
Vdd = 3.5 V to 26.0 V
Built-in regulator
Built-in reverse voltage protection circuit
Built-in output current limit circuit
Operation temperature range
Ta = −40℃ to +125℃
Sn 100%
AEC-Q100 qualified*2

*1. The option can be selected.
*2. Contact our sales office for details.


  • Automobile equipment
  • Home appliance
  • DC brushless motor
  • Housing equipment
  • Industrial equipment