Field-Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switches
A3250 and
A3251
14
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Package LT, 3-Pin SOT89
Parting
Line
2.24
1.14
3
2
1
A
A Active Area Depth, 0.78 mm REF
B
C
D
C
2X 1.50 BSC
4.50?.10
1.50?.10
0.50?.06
0.42?.06
1.73
+0.10
0.11
2.20
+0.09
0.07
2.45
+0.15
0.16
4.10
+0.15
0.16
1.00
+0.20
0.11
0.40
+0.04
0.05
Branding scale and appearance at supplier discretion
Hall element, not to scale
Reference land pattern layout (reference IPC7351 SOT89N);
All pads a minimum of 0.20 mm from all adjacent pads;
adjust as necessary to meet application process
requirements and PCB layout tolerances
Standard Branding Reference View
NNT
1
= Supplier emblem
N = Last two digits of device part number
T = Temperature code
For Reference Only; not for tooling use (reference JEDEC. TO-243AA)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
1.50
1.00
0.80
2.60
2.00
2.50
0.70
4.60
B
PCB Layout Reference View
Basic pads for low-stress, not self-aligning
Additional pad for low-stress, self-aligning
Additional area for IPC reference layout
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