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AH3761 (Not Recommended for new design)

NRND = Not Recommended for New Design

Hall Effect Latch with Output Over Current Limit and Reverse Blocking Diode on the Supply Pin

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The AH3761 is a high sensitivity CMOS Halls effect latch sensor for single-phase brushless DC (BLDC) fans and motor commutation applications. The AH3761 has an integrated band-gap voltage regulator, Hall-voltage transducer, amplifier, chopper stabilization, Schmitt trigger and open-drain output. With wide operating voltage and temperature range, AH3761 is a small versatile Hall-effect latch devices that turns on with south magnetic field of sufficient strength and turns off with north magnetic field of sufficient strength. It retains the output state when magnetic field is removed. The AH3761 is available in SC59 (SOT23) and SIP3 (TO-92) packages.


  • Wide operating voltage: 3V to 28V - Works with a wide range of power supply systems, eg. 3.3V/5V/12/24V
  • Chopper stabilised: - Extremely Low Switch-Point Drift - Superior temperature stability - Insensitive to physical stress
  • High drive capability (up to 50mA) with built-in short-circuit limit - Output can sink up to 50mA - Easy interface to wide variety of electronics circuits - Safe operation against output short-circuit
  • Reverse supply protection - Protects against reverse battery/power connection
  • Wide operating temperature range:-40°C to +125°C - Easily meets industrial temperature - Suitable for thermally demanding applications
  • Package : SC59 (SOT23) and SIP3 (TO-92) Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/RoHS Compliant


  • BLDC fans and motors commutation
  • RPM monitoring
  • Position sensing

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) No
Average Supply Current (µA) 4
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) -
Operating Voltage (V) 3 to 28
Output Current Capability (mA) 50
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

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