Two-Wire Chopper-Stabilized Hall Effect Latch
A1242
2
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Description (continued)
Pin-out Diagrams
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating Unit*
Supply Voltage
V
CC
28
V
Reverse Supply Voltage
V
RCC
18
V
Magnetic Flux Density
B
Unlimited
G
Operating Ambient Temperature
T
A
Range E
40 to 85
篊
Range L
40 to 150 篊
Maximum Junction Temperature
T
J
(max)
165
篊
Storage Temperature
T
stg
65 to 170 篊
*1 G (gauss) = 0.1 mT (millitesla)
matching, very low input-offset errors and small component
geometries.
Suffix L- devices are rated for operation over a temperature range
of 40癈 to +150癈; suffix E- devices are rated for operation over
a temperature range of 40癈 to +85癈. Two A1242 package styles
provide magnetically optimized solutions for most applications.
Package LH is a SOT23W, a miniature low-profile surface-mount
package, while package UA is a three-pin ultramini SIP for through-
hole mounting. Each package is available lead (Pb) free, with 100%
matte tin plated leadframes.
1
2
3
NC
3
Selection Guide
Part Number
Packaging*
Mounting
Low Current, I
CC(L)
(mA)
Ambient, T
A
(癈)
B
RP(MIN)
(G)
B
OP(MAX)
(G)
A1242ELHLT-I1-T
7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount
5.0 to 6.9
40 to 85
80
80
A1242ELHLT-I2-T
2.0 to 5.0
A1242EUA-I1-T Bulk, 500 pieces/bag
3-pin SIP through hole
5.0 to 6.9
A1242LLHLT-I1-T
7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount
5.0 to 6.9
40 to 150
A1242LLHLT-I2-T
2.0 to 5.0
A1242LUA-I1-T
Bulk, 500 pieces/bag
3-pin SIP through hole
5.0 to 6.9
A1242LUA-I2-T
2.0 to 5.0
*Contact Allegro for additional packing options.
Terminal List
Name
Number
Function
Package LH Package UA
VCC
1
1 Connects power supply to chip
GND
3
2,3 Ground
NC
2
No internal connection
LH Package
UA Package
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