Diodes Incorporated
X2 DFN1010 4

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

X2 DFN1410 4

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

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High Sensitivity Ultra-Low Power Digital Dual Output Unipolar Hall Effect Switch

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The AH1391 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 AH1391 can operate over the supply range of 1.6V to 5.5V and uses a sleep function to give an average supply current of only 1.1μA at 1.85V. The AH1391 has a 6kV ESD rating on the supply and output pins. To minimize PCB space the AH1391 are packaged in small low profile X2-DFN1410-4 and X2-DFN1010-4 (Type B).

A North pole of sufficient strength will turn Output1 on and a South pole of sufficient strength will 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).


  • Two Monolithic Unipolar Hall Switches
    • Operation with a North Pole (Output1) to Part Marking Surface
    • Operation with a South Pole (Output2) to Part Marking Surface
  • Supply Voltage of 1.6V to 5.5V
  • 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 Range -40°C to +85°C
  • 6kV ESD on Supply and Output Pins
  • Small Low Profile X2-DFN1410-4 and X2-DFN1010-4 (Type B)
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Smart cover or dock detect for cellular phones and tablets
  • Position detect for digital stills, video cameras and handheld gaming consoles
  • Doors, lids and tray position detect switches home appliances and industrial applications
  • Levels, proximities and position switches
  • Contact-less switches in home appliances and industrial applications

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
AEC Qualified No
Type Unipolar
Outputs Dual
Output Type Push-Pull
Active Output State (B > Bop) Low
Inactive Output State (B < Brp) High
Operating Voltage (V) 1.6 to 5.5
Average Supply Current (mA) 0.0011
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 13
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 25
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 39
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 7
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 20
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 34
Output Current Capability (mA) 5
Operating Ambient Temperature (°C) -40 to 85

Technical Documents

Recommended Soldering Techniques