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The AH1804 is a micropower Omnipolar Hall effect switch IC with a single output driver 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 12µA at 3.3V.
To support battery powered equipment the AH1804 has been optimized to operate over the supply range of 2.5V to 3.6V and uses a sleep function to minimise power consumption.
To minimize PCB space the AH1804 is packaged in small low profile package.
The outputs of the AH1804 are switched with either a North or South pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (pul°C low) and held until B is lower than release point (Brp).
The AH1804 is available in DFN1216-4 and SC59 packages.
• Cover switch in clam-shell and slide cellular phones
• Cover switch in Netbook, Notebook, Tablets and PDAs
Contact-less switch in portable and battery powered applications