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A3209

Allegro MicroSystems
Part Number A3209
Manufacturer Allegro MicroSystems
Description ULTRA-SENSITIVE HALL-EFFECT SWITCHES
Published Mar 23, 2005
Detailed Description 3209 AND 3210 Package Suffix ‘LH’ Pinning 3 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES The A3209Ex and A3210Ex in...
Datasheet PDF File A3209 PDF File

A3209
A3209

Overview
3209 AND 3210 Package Suffix ‘LH’ Pinning 3 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES The A3209Ex and A3210Ex integrated circuits are ultra-sensitive, pole independent Hall-effect switches with a latched digital output.
They are especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers.
2.
5 volt to 3.
5 volt operation and a unique clocking scheme to reduce the average operating power requirements – the A3209Ex to 400 µW, the A3210Ex to 25 µW! Except for operating duty cycle and average operating current, the A3209Ex and A3210Ex are identical.
Unlike other Hall-effect switches, either a north or south pole of sufficient strength will turn the output on; in the absence of a magnetic field, the output is off.
The polarity independence and minimal power requirement allows these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the require...


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