Micropower, Ultrasensitive Hall-Ef Fect Switches

The A3211 and A3212 integrated circuits are ultrasensitive, pole independent Hall-effect switches with latched digital output. These Sensors are especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. A 2.5 to 3.5 V operation and a unique clocking scheme reduce the average operating power requirements to less than 15 W with a 2.75 V supply.
Unlike other Hall-effect switches, either a north or south pole of sufficient strength will turn the output on in the A3212 and in the absence of a magnetic field, the output is off. The A3211 provides an inverted output. The polarity independence and minimal power requirements allow these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the requirement for signal conditioning.
By Allegro MicroSystems, Inc.
A3211 's PackagesA3211 's pdf datasheet

A3211 Pinout, Pinouts
A3211 pinout,Pin out
This is one package pinout of A3211,If you need more pinouts please download A3211's pdf datasheet.

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