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Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
A1140, A1142, and
A1143
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Product Selection Guide
Part Number
Packing
1
Package
Operating Ambient
Temperature, T
A
 (癈)
Output Level in
South (+) Field
2
Supply Current at
Low Output, I
CC(L)
 
(mA)
A1140ELHLT-T
3,4
Tape and Reel, 3000 pieces/reel   Surface Mount    40 to 85
Low
2 to 5
A1142ELHLT-T
5
Tape and Reel, 3000 pieces/reel   Surface Mount    40 to 85
Low
5 to 6.9
A1142LUA-T
5
Bulk Bag, 500 pieces/bag
Through Hole    40 to 150
A1143ELHLT-T
5
Tape and Reel, 3000 pieces/reel   Surface Mount
40 to 85
High
A1143EUA-T
5
Bulk Bag, 500 pieces/bag
Through Hole
A1143LLHLT-T
5
Tape and Reel, 3000 pieces/reel   Surface Mount
40 to 150
A1143LUA-T
5
Bulk Bag, 500 pieces/bag
Through Hole
1
Contact Allegro for additional packing options.
2
South (+) magnetic fields must be of sufficient strength.
3
This device is available only in limited distribution. Interested customers should contact the appropriate sales person or field application
engineer for more information on availability.
4
Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is cur-
rently restricted to existing customer applications. The variant should not be purchased for new design applications because obsolescence
in the near future is probable. Samples are no longer available. Status change: January 31, 2011.
5
These variants are in production, however, they have been deemed Pre-End of Life. The products are approaching end of life. Within a
minimum of 6 months, the devices will enter their final, Last Time Buy, order phase. Suggested replacements: for the A1142ELHLT-T use
the A1152LLHLX-T, for the A1143ELHLT-T and the A1143LLHLT-T use the A1153LLHLX-T. Status change: January 31, 2011. Suggested
replacements: for the A1142LUA-T use the A1152LUA-T, for the A1143EUA-T and the A1143LUA-T use the A1153LUA-T. Status change:
March 8, 2011.
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