3132
AND
3133
ULTRA-SENSITIVE BIPOLAR
HALL-EFFECT SWITCHES
These Hall-effect switches are designed for magnetic actuation using
a bipolar magnetic field, i.e., a north-south alternating field. They
combine extreme magnetic sensitivity with excellent stability over
varying temperature and supply voltage. The high sensitivity permits
their use with multi-pole ring magnets over relatively large distances.
Each device includes a voltage regulator, quadratic Hall voltage
generator, temperature stability circuit, signal amplifier, Schmitt trigger,
and open-collector output on a single silicon chip. The on-board regula-
tor permits operation with supply voltages of 4.5 to 24 V. The switch
output can sink up to 25 mA. With suitable output pull up, they can be
used directly with bipolar or MOS logic circuits.
Data Sheet
27631.2B*
V
X
CC
1
2
3
GROUND
OUTPUT
SUPPLY
The three package styles available provide a magnetically optimized
package for most applications. Suffix ‘LT’ is a miniature SOT-89/TO-
243AA transistor package for surface-mount applications; suffixes ‘U’,
and ‘UA’ feature wire leads for through-hole mounting. Prefix ‘UGN’
devices are rated for continuous operation over the temperature range of
-20°C to +85°C, prefix ‘UGS’ devices over an extended range of -40°C
to +125°C, and prefix ‘UGL’ devices over the range of -40°C to +150°C.
FEATURES
s
4.5 V to 24 V Operation
s
Reverse Battery Protection
s
Superior Temperature Stability
s
Superior Supply Voltage Stability
s
Activate with Multi-Pole Ring Magnets
Dwg. PH-003A
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
. . . . . . . . . . . . .
25 V
Reverse Battery Voltage, V
RCC
. . . .
-35 V
Magnetic Flux Density, B . . . .
Unlimited
Output OFF Voltage, V
OUT
. . . . . . . .
25 V
Continuous Output Current, I
OUT
.
25 mA
Operating Temperature Range, T
A
Prefix UGL . . . . . . .
-40
°
C to +150
°
C
Prefix UGN . . . . . . . .
-20
°
C to +85
°
C
Prefix UGS . . . . . . .
-40
°
C to +125
°
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . .
-65
°
C to +150
°
C
s
Solid-State Reliability
s
Small Size
s
Constant Output Amplitude
s
Resistant to Physical Stress
The UGx3132U is not for new design.
The UGx3133U is last-time buy. Orders accepted
until April 15, 2002.
Always order by complete part number
including prefix and suffix, e.g.,
UGN3132LT .
3132
AND
3133
BIPOLAR
HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
1
V
CC
REG.
X
3
OUTPUT
GROUND
2
Dwg. FH-005-2
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C
Limits
Characteristic
Supply Voltage
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Fall Time
Symbol
V
CC
V
OUT(SAT)
I
OFF
I
CC
t
r
t
f
Test Conditions
Operating
I
OUT
= 20 mA, B
≥
B
OP
V
OUT
= 24 V, B
≤
B
RP
V
CC
= 24 V, B
≤
B
RP
V
CC
= 12 V, R
L
= 820
Ω,
C
L
= 20 pF
V
CC
= 12 V, R
L
= 820
Ω,
C
L
= 20 pF
Min.
4.5
145
<1.0
4.3
0.04
0.18
Typ.
Max.
24
400
10
9.0
2.0
2.0
Units
V
mV
µA
mA
µs
µs
MAGNETIC CHARACTERISTICS over operating temperature and voltage range.
Limits
Characteristic
Operate Point
Symbol
B
OP
Device Type*
3132
3133
Release Point
B
RP
3132
3133
Hysteresis
B
hys
Both
-95
-75
30
Min.
Typ.
32
32
-20
-20
52
Max.
95
75
Units
G
G
G
G
G
NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention.)
Typical values are at T
A
= +25°C and V
CC
= 12 V.
*
Complete part number includes a prefix denoting operating temperature range (UGL, UGN, or UGS)
and a suffix denoting package type (LT, U, or UA).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1996,1999, Allegro MicroSystems, Inc.
3132
AND
3133
BIPOLAR
HALL-EFFECT SWITCHES
TYPICAL CHARACTERISTICS
40
40
OPERATE POINT
20
OPERATE POINT
20
SWITCH POINT IN GAUSS
0
V
CC
= 12 V
I
OUT
= 20 mA
SWITCH POINT IN GAUSS
0
T
A
= 25°C
I
OUT
= 20 mA
RELEASE POINT
-20
-20
RELEASE POINT
-40
-50
-25
0
25
50
75
100
125
-40
4.0
8.0
12
16
20
24
28
Dwg. GH-021
AMBIENT TEMPERATURE IN
°C
Dwg. GH-022
SUPPLY VOLTAGE IN VOLTS
200
6.0
I
OUT
= 20 mA
B
≥
B
OP
V
CC
= 12 V
SATURATION VOLTAGE IN mV
175
SUPPLY CURRENT IN mA
5.0
150
4.0
B
≤
B
RP
125
100
-50
-25
0
25
50
75
100
125
3.0
-50
-25
0
25
50
75
100
125
AMBIENT TEMPERATURE IN
°C
Dwg. GH-024
AMBIENT TEMPERATURE IN
°C
Dwg. GH-023
www.allegromicro.com
3132
AND
3133
BIPOLAR
HALL-EFFECT SWITCHES
SENSOR LOCATIONS
(±0.005 [0.13mm] die placement)
SUFFIX “LT”
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
0.089"
2.26 mm
0.043"
1.09 mm
A
1
2
3
Dwg. MH-008-2D
SUFFIX “U”
ACTIVE AREA DEPTH
0.0165"
0.42 mm
NOM
SUFFIX “UA”
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.070"
1.78 mm
0.091"
2.31 mm
0.082"
2.07 mm
A
BRANDED
SURFACE
1
2
3
A
BRANDED
SURFACE
1
2
3
0.055"
1.39 mm
Dwg. MH-002-2C
Dwg. MH-011-10A
Allegro
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3132
AND
3133
BIPOLAR
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR ‘LT’
(SOT-89/TO-243AA)
Dimensions in Inches
(for reference only)
0.181
0.173
0.072
0.064
0.167
0.155
0.102
0.090
0.063
0.055
0.0173
0.0138
1
2
3
0.090
0.084
0.047
0.035
0.059
BSC
0.0189
0.0142
0.0221
0.0173
0.118
BSC
Dwg. MA-009-3A in
Dimensions in Millimeters
(controlling dimensions)
4.60
4.40
1.83
1.62
4.25
3.94
2.60
2.29
1.60
1.40
0.44
0.35
1
2
3
2.29
2.13
1.20
0.89
1.50
BSC
0.48
0.36
0.56
0.44
3.00
BSC
Dwg. MA-009-3A mm
NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are
measured at the widest point (parting line).
2. Exact body and lead configuration at vendor’s option within limits shown.
3. Height does not include mold gate flash.
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