Diodes Incorporated
X2 DFN1010 4

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

Back to Hall Effect Latches and Switches


Ultra Low Voltage High-Sensitivity Micropower Omnipolar Hall-Effect Switch

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AH1899S is a high-sensitivity micropower, Omnipolar Hall effect switch IC with internal pull-up and pull-down capability. Designed for portable and battery-powered equipment, such as cellular phones and portable PCs, the average supply current is only 5.1µA at 1.2V and 5.8µA at 1.8V. To support portable equipment, the AH1899S can operate over the supply range of 1.1V to 2.0V and uses a hibernating clocking system to minimize the power consumption. To minimize PCB space, the AH1899S is available in a small low profile X2- DFN1010-4 (Type B) package.

The output is activated with either a north or south pole of sufficient magnetic field strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), the output is turned on (pulled low). The output is turned off when B becomes lower than the release point (Brp). The output will remain off when there is no magnetic field.


  • Omnipolar Operation (North or South Pole)
  • Supply Voltage of 1.1V to 2.0V
  • Micropower Operation
  • Chopper Stabilized Design Provides:
    • Superior Temperature Stability
    • Minimal Switch Point Drift
    • Enhanced Immunity to Physical Stress
  • No External Pull-Up Resistors Required
  • Good RF Noise Immunity
  • -40°C to +85°C Operating Temperature
  • Small Low-Profile X2-DFN1010-4 (Type B) Package
  • 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/


  • Covers or display switches in portable PCs
  • Open and close detects for cellular phones
  • Holsters or cover detects for cellular phones and tablet PCs
  • Digital stills, Video cameras, and handheld gaming consoles
  • Contactless switches

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
AEC Qualified No
Type Omnipolar
Outputs Single
Output Type Push-Pull
Active Output State (B > Bop) Low
Inactive Output State (B < Brp) High
Key Feature Ultra Low Voltage, Micropower
Operating Voltage (V) 1.1 to 2.0
Average Supply Current (mA) 5.1
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 20
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 30
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 40
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 10
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 20
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 30
Output Current Capability (mA) 3
Operating Ambient Temperature (°C) -40 to 85

Related Content


Technical Documents

Recommended Soldering Techniques