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Dual Output with North and South Field Detecting Micropower Unipolar Hall Effect Switch

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The AH1389 is a miniature micropower magnetic Unipolar Hall effect switch IC with dual outputs specifically designed for portable and battery powered consumer equipment to home appliances and industrial applications. To support battery powered equipment and low voltage microcontrollers, the AH1389 can operate over the supply range of 1.6V to 3.6V and uses a sleep function to give an average supply current is only 4µA at 1.85V. The AH1389 has an 8kV ESD rating on the supply and output pins. To minimize PCB space the AH1389 is packaged in small low profile X2-DFN1410-4.

A North pole of sufficient strength will turn OUTPUT1 on and a South pole of sufficient strength with turn on OUTPUT2. The Output1 is turned on (pulled low) when the magnetic flux density (B), perpendicular to the part marking surface, falls below North field operate point BOPN (-25G typical). The Output1 is held low until B rises above the North field release point BRPN (-20G typical). Similarly, the Output2 will operate (pulled low) when B to the part marking surface rises above South field operate point BOPS (25G typical) and is held low until B falls below the South field release point BRPS (20G typical).


  • Smart Cover or Dock Detect for Cellular Phones and Tablet
  • Position Detect for Digital Still, Video Cameras and Handheld Gaming Consoles
  • Door, Lids and Tray Position Detect Switches Home Appliances and Industrial Applications
  • Level, Proximity and Position Switches
  • Contact-Less Switches in Home Appliances and Industrial Applications


  • Two monolithic Unipolar Hall switches
    • Operation with a North Pole (Output1) to the part marking surface
    • Operation with a South Pole (Output2) to the part marking surface
  • Supply voltage of 1.6V to 3.6V
  • Micropower operation
  • Dual outputs for independent pole detection for design flexibility
  • Internal pull up and pull down capability
  • Chopper stabilized design
    • Superior temperature stability
    • Extremely Low Switch-Point Drift
    • Insensitive to Physical Stress
  • Good RF noise immunity
  • Operating temperature -40°C to +85°C
  • 8kV ESD on supply and output pins
  • Small Low Profile X2-DFN1410-4
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Output Type Dual Pole Dependent, Push-Pull Active Low
Operating Voltage 1.6 to 3.6 V
Average Supply Current 0.004 mA
Grade N/A
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Min) 13
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Typ) 25
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Max) 39
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Min) 9
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Typ) 20
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Max) 37
Operating Ambient Temperature -40 to 85 °C

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Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AH1389-HK4-7 Mouser Electronics Inc. 5143 8/3/2020 Buy Now United States
AH1389-HK4-7 Digi-Key Electronics 5533 8/2/2020 Buy Now United States
AH1389-HK4-7 Farnell, An Avnet Company 3995 8/2/2020 Buy Now England


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