SS249

CMOS Omnipolar High Sensitivity Micropower Hall Switch

1

V3.10

Nov 1, 2013

Packages

Features and Benefits

3 pin SOT23 (suffix SO)

3 pin SIP (suffix UA)

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Solid-State Reliability much better than reed

Switch

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Omnipolar, output switches with absolute value

of North or South pole from magnet

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Operation from 2.5V to 5.5V

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High sensitivity for direct reed switch

replacement applications

Functional Block Diagram

Application Examples

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Solid state switch

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Speed detection

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Interrupter

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Magnet proximity sensor for reed switch

replacement

General Description:

The SS249 Omnipolar Hall effect sensor IC is fabricated from mixed signal CMOS technology .It incorporates

advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points.

The output transistor of the SS249 will be latched on (BOP) in the presence of a sufficiently strong South or

North magnetic field facing the marked side of the package. The output will be latched off (BRP) in the absence

of a magnetic field.

OUT

Sleep/Awake

Logic

Chopper

Hall

Plate

GND