AH1893
HIGH SENSITIVITY MICROPOWER
OMNIPOLAR HALL-EFFECT SWITCH
Description Pin Assignments
The AH1893 is a high sensitivity micropower Omnipolar Hall effect
(Top View)
switch IC with internal pull up and pull down capability. Designed for
portable and battery powered equipment such as cellular phones and
portable PCs to home appliances and industrial applications, the
average supply current is only 4.3A at 1.85V. To support potable
equipment the AH1893 can operate over the supply range of 1.6V to
3.6V and uses a hibernating clocking system to minimize the power X1-DFN1216-4
consumption. To minimize PCB space the AH1893 is available in
small low profile X1-DFN1216-4 and SOT553 packages.
(Top View)
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 will be turned on (pulled low) and held until B is lower than
release point (Brp).
SOT553
Features
Applications
Omnipolar Operation (North or South pole)
Open and Close Detect for Cellular Phones
Supply Voltage of 1.6V to 3.6V
Holster or Cover Detect for Cellular Phones and Tablet PCs
High Sensitivity
Cover or Display Switch in Portable PCs
Micropower Operation
Digital Still, Video Cameras and Handheld Gaming Consoles
Chopper Stabilized Design Provides
Door, Lids and Tray Position Switches
Superior Temperature Stability
Level, Proximity and Position Switches
Minimal Switch Point Drift
Contact-Less Switches in Home Appliances and Industrial
Enhanced Immunity to Physical Stress
Applications
No External Pull-up Resistors Required
Good RF Noise Immunity
-40C to +85C Operating Temperature
High ESD capability of 8kV (Human Body Model)
Small Low Profile SOT553 and X1-DFN1216-4 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
AH1893
Pin Descriptions
Package: X1-DFN1216-4
Pin Number Pin Name Function
1 OUTPUT Output Pin
2
V Power Supply Input
DD
3 NC No Connection (Note 5)
4 GND Ground Pin
Package: SOT553
Pin Number Pin Name Function
1 Power Supply Input
V
DD
2 NC No Connection (Note 5)
3 NC No Connection (Note 5)
4 GND Ground
5 OUTPUT Output
Note: 5. NC is No Connection pin and is not connected internally. This pin can be left open or tied to ground.
Functional Block Diagram
2 of 10 July 2013
AH1893
Diodes Incorporated
www.diodes.com
Document number: DS35740 Rev. 1 - 2
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