SS189

Unipolar Hall-Effect Digital Switch

1

V3.10

Nov 1, 2013

Packages

Features and Benefits

3 pin SOT23 (suffix SO)

3 pin SIP (suffix UA)

–

4.5V to 24V Operation

–

-40°C to 150°C Superior temperature operation

–

Bipolar technology

–

Open-collector 25 mA output

–

Reverse battery protection

–

Small Size SOT23 3L or SIP 3L

–

Solid-state reliability

–

Resistant to physical stress

–

Activate with small, commercially available

Permanent magnets

Functional Block Diagram

Application Examples

–

Automotive, Consumer and Industrial

–

Solid-state switch

–

Brushless DC motor commutation

–

Speed detection

–

Angular position detection

–

Linear position detection

–

Proximity detection

General Description

The SS189 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 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 characteristic makes these devices ideal for use with a simple bar or rod

magnet.

Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in

automotive, industrial and consumer applications.

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.

OUT

Voltage

Regulatr

Chopper

Hall

Plate

GND

SIP Package

SOT Package

Pin 2 – GND

Pin 2 – OUT

Pin 3 – OUT

Pin 3 – GND