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AH1751 (Not Recommended for new design)

NRND = Not Recommended for New Design

Medium Sensitivity Hall Effect Latches with Reverse Blocking Diode on the Supply Pin

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AH1751 is a single-digital-output Hall-effect sensor 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 open-collector output pre-driver. An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. While the magnetic flux density (B) is larger than threshold Bop, the OUT pin turns on (low). If B removed toward Brp, the OUT pin is latched “on” state prior to B < Brp. When B < Brp, the OUT pin go into “ off ” state.


  • Bipolar Hall Effect Latch Sensor
  • 3.5V to 20V DC Operation Voltage
  • Open Collector Pre-Driver
  • 50mA Output Sink Current
  • Chip Power Reverse-Connection Protection
  • Operating Temperature: -40oC~125oC
  • Package: SIP3
  • SIP3: Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/ RoHS Compliant


  • Rotor Position Sensing
  • Current Switch
  • Encoder
  • RPM Detection

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) No
Average Supply Current (µA) 3.5
Operating Ambient Temperature (°C) -40 to 125
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Max) 70
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Min) 5
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Typ) -
Operating Voltage (V) 3.5 to 20
Output Current Capability (mA) 50
Output Type Single, Open Collector, Active Low
AEC Qualified No
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Max) -5
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Min) -70
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Typ) -

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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-2610 2023-03-30 2023-09-30 Device End of Life (EOL)
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site
PCN-2310 2018-01-24 2018-01-24 Device End of Life (EOL)