SS3144

Unipolar Hall-Effect Digital Switch

2

V3.10

Nov 1, 2013

General

Descriptions

The SS3144 is a unipolar Hall-effect sensor IC fabri-

cated from bipolar technology. The device integrates a

voltage regulator, reverse battery protection diode,

Hall sensor with dynamic offset cancellation system,

temperature compensation circuitry, small signal am-

plifier, Schmitt trigger and an open-collector output to

sink up to 25 mA. With suitable output pull up, they

can be used with bipolar or CMOS logic circuits.

These Hall-effect switches are monolithic integrated

circuits with tighter magnetic specifications, designed

to operate continuously over extended temperatures to

+150°C,and are more stable with both temperature and

supply voltage changes. The unipolar switching char-

acteristic makes these devices ideal for use with a sim-

ple bar or rod magnet.

Thanks to its wide operating voltage range and extend-

ed choice of temperature range, it is quite suitable for

use in automotive, industrial and consumer applica-

tions.

The device is delivered in a Small Outline Transistor

(SOT) or in a Plastic Single In Line (SIP 3L flat). Both

3-lead packages are RoHS compliant.

Glossary of Terms

MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss

RoHS

Restriction of Hazardous Substances

Magnetic flux density applied on the branded side of the package which turns the output

Magnetic flux density applied on the branded side of the package which turns the output