SS129_1311 Datasheet, PDF (1/5 Pages) SEC Electronics Inc. – Unipolar Hall-Effect Digital Switch

Packages
3 pin SOT23 (suffix SO)
SS129
Unipolar Hall-Effect Digital Switch
3 pin SIP (suffix UA)
Features and Benefits
– 4.5V to 24V Operation
– -40°C to 150°C Superior temperature operation
– Bipolar technology
– Open-collector 25 mA output
– Reverse battery protection
– Solid-state reliability
– Resistant to physical stress
– Small Size SOT23 3L or SIP 3L
– Activate with small, commercially available
Permanent magnets
Functional Block Diagram
V_DD
Voltage
Regulatr
Chopper
Hall
Plate
GND
OUT
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 SS129 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) and in a Plastic Single In Line ( SIP 3L flat). Both
3-lead packages are RoHS compliant.
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V3.10 Nov 1, 2013