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AH374 (Not Recommended for new design)

NRND = Not Recommended for New Design


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AH374 is an integrated Hall-Effect latched sensor designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An internal band-gap regulator provides a temperature compensated supply voltage for internal circuits and allows a wide operating supply range.

When the magnetic flux density (B) is larger than operate point (Bop), output is switched on (OUT pin is pulled 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 AH374 is available in SIP-3L, SC59 and SOT23 packages.


  • COMS Hall Effect Latch Operation
  • 2.2V to 20V Operating Range
  • Open drain pre-driver
  • 25mA output Sink Capability
  • -40°C to +125°C Operating Temperature
  • Industry Standard SIP-3, SC59 and SOT23 Packages
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device


  • Brushless DC Motor
  • Brushless DC Fan
  • Revolution Counting
  • Speed Measurement

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, Open Drain, 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-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site