Effect Switches. A3141 Datasheet

A3141 Switches. Datasheet pdf. Equivalent

Part A3141
Description Sensitive Hall Effect Switches
Feature A3141, A3142, A3143, and A3144 Sensitive Hall Effect Switches for High-Temperature Operation Discont.
Manufacture Allegro MicroSystems
Download A3141 Datasheet

A3141, A3142, A3143, and A3144 Sensitive Hall Effect Switche A3141 Datasheet
Recommendation Recommendation Datasheet A3141 Datasheet

A3141, A3142, A3143, and A3144
Sensitive Hall Effect Switches for High-Temperature Operation
Discontinued Product
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: October 31, 2005
Recommended Substitutions:
For new customers and applications:
• for the A3141, refer to the A1101
• for the A3142, refer to the A1102
• for the A3143, refer to the A1103
• for the A3144, refer to the A1104
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a
product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information
included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor
for any infringements of patents or other rights of third parties which may result from its use.

3141 THRU
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, 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. The A3141– and A3142– are im-
proved replacements for the UGN/UGS3140–; the A3144– is the
improved replacement for the UGN/UGS3120–.
Dwg. PH-003A
Pinning is shown viewed from branded side.
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
at TA = +25°C
Supply Voltage, VCC ............................ 28 V
Battery Voltage,
Magnetic Flux Density, B .......... Unlimited
Output OFF Voltage, V
28 V
Reverse Output Voltage, VOUT ........... -0.5 V
Continuous Output Current, IOUT ...... 25 mA
Operating Temperature Range, T
Suffix ‘E–’ .................. -40°C to +85°C
Suffix ‘L–’ ................ -40°C to +150°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
s Superior Temp. Stability for Automotive or Industrial Applications
s 4.5 V to 24 V Operation … Needs Only An Unregulated Supply
s Open-Collector 25 mA Output … Compatible with Digital Logic
s Reverse Battery Protection
s Activate with Small, Commercially Available Permanent Magnets
s Solid-State Reliability
s Small Size
s Resistant to Physical Stress
Always order by complete part number, e.g., A3141ELT .

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