Product Descriptions

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. The four basic devices (3141, 3142, 3143, and 3144) are 

identical except for magnetic switch points.

Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, reverse battery protection diode, quadratic

Hall-voltage generator, temperature compensation circuitry, smallsignal 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. The A3141– and A3142– are improved 

replacements for the UGN/UGS3140–; the A3144– is the improved replacement for the UGN/UGS3120–.

The first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for the automotive and

industrial temperature range of -40°C to +85°C. Suffix ‘L–’ is for the automotive and military temperature range of -40°C to +150°C. Three

package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT89/TO-243AA transistor

package for surface-mount applications; suffix ‘–UA’ is a three-lead ultra-mini-SIP.

Product Features

■ Superior Temp. Stability for Automotive or Industrial Applications

■ 4.5 V to 24 V Operation … Needs Only An Unregulated Supply

■ Open-Collector 25 mA Output … Compatible with Digital Logic

■ Reverse Battery Protection

■ Activate with Small, Commercially Available Permanent Magnets

■ Solid-State Reliability

■ Small Size

■ Resistant to Physical Stress

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