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AH373 (Obsolete)

High Temperature High Sensitivity Hall Effect Latch

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AH373 is a single-digital-output Hall-Effect latch sensor with internal pull-up resistor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an output driver with a pull-up resistor. An internal band-gap regulator provides a temperature compensated supply voltage for internal circuits and allows a wide operating supply range. To support home appliance and industrial applications, the operating voltage range is up to 20V. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), output is switched on (OUT pin is pul°C low). The output state is held on until a magnetic flux density reversal falls below Brp. When B is less than Brp, the output is switched off. The AH373 is available in a industry standard SC59,SOT23 and SIP-3L packages.


  • Bipolar Hall Effect Latch Operation
  • 2.2V to 20V Operating Range
  • Single Output with Built-in Pull-up Resistor
  • 25mA output Sink Capability
  • -40°C to +125°C Operating Temperature
  • Industry Standard SIP-3L, SC59 and SOT23 Packages


  • Rotor Position Sensing for Motor Commutation
  • Encoder
  • Speed Measurement – RPM Monitor
  • Contact-less Current Switch

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) No
Average Supply Current (µA) 2
Operating Ambient Temperature (°C) -40 to 125
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Max) 60
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Min) 5
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Typ) 30
Operating Voltage (V) 2.2 to 20
Output Current Capability (mA) 25
Output Type Single, Internal Pull-Up Resistor, Active Low
AEC Qualified No
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Max) -5
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Min) -60
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Typ) -30

Technical Documents

Recommended Soldering Techniques



Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2587 2022-05-13 2022-11-13 Device End of Life (EOL)
PCN-2364 2018-10-04 2019-04-04 Device End of Life (EOL)