SS143

Unipolar Hall-Effect Digital Switch

2

V3.10

Nov 1, 2013

General

Description

The SS143 is a unipolar Hall-effect sensor IC

fabricated 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 amplifier, Schmitt trigger

and an open-collector output to sink up to 50 mA.

With suitable output pull up, they can be used with

bipolar or CMOS logic circuits.

These Hall-effect switches are monolithic integrat-

ed 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.

Internal compensation characteristic makes the

sensitivity

increase

slightly

with

temperature

increasing, so that this IC is Particularly suitable to

be used with the commonly low-cost magnets. If a

magnetic flux density larger than threshold Bop,

Output is turned on (low). When a magnetic flux

density reversal falls below Brp, Output will be

turned off (high).

Thanks to its wide operating voltage range,

extended choice of temperature range and high

reliability, it is quite suitable for use in automotive,

industrial and consumer applications.

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