8

A1321-DS Rev. 3

Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation

A1321/A1322/A1323

Package LH, 3-Pin; (SOT-23W)

2.40

BSC

.094

1.00

BSC

.039

0.70

BSC

.028

3.10

2.90

.122

.114

2.10

1.85

.083

.073

3.00

2.70

.118

.106

0.55

REF

.022

1.49

NOM

.059

0.28

NOM

.011

0.96

NOM

.038

0.95

BSC

.037

0.95

BSC

.037

0.25

MIN

.010

0.15

0.00

.006

.000

1.13

0.87

.045

.034

0.20

0.13

.008

.005

8º

0º

0.50

.020

.012

0.30

0.25

BSC

.010

Gauge Plane

Seating Plane

2

1

3

Dimensions in millimeters

U.S. Customary dimensions (in.) in brackets, for reference only

A

Hall element

B

Active Area Depth 0.28 [.011]

C

C

Fits SC–59A Solder Pad Layout

A

Package UA, 3-Pin; (TO-92)

B

.164

.159

4.17

4.04

.122

.117

3.10

2.97

.062

.058

1.57

1.47

.017

.014

0.44

0.35

.019

.014

0.48

0.36

.640

.600

16.26

15.24

.085

MAX

2.16

.050

BSC

1.27

.031

REF

0.79

.0195

NOM

0.50

.0805

NOM

2.04

1.44

.0565

NOM

45°

BSC

45°

BSC

Dimensions in inches

Metric dimensions (mm) in brackets, for reference only

23

1

A

A

B

Dambar removal protrusion

Hall element