SS189
Unipolar Hall-Effect Digital Switch
Packages
Features and Benefits
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4.5V to 24V Operation
-40℃ to 150℃ 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
3 pin SOT23 (suffix SO)
3 pin SIP (suffix UA)
Functional Block Diagram
Application Examples
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Automotive, Consumer and Industrial
Solid-state switch
Brushless DC motor commutation
Speed detection
Angular position detection
Linear position detection
Proximity detection
VDD
Voltage
Regulator
OUT
Chopper
Hall
Plate
General Description
GND
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.
SIP Package
Pin 1 – VDD
Pin 2 – GND
Pin 3 – OUT
SOT Package
Pin 1 – VDD
Pin 2 – OUT
Pin 3 – GND
These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate
continuously over extended temperatures to +150℃, 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.
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V2.10 May 1, 2012
SECELECTRONICS [ SEC Electronics Inc. ]
