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.
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 +85C, prefix `UGS' devices over an extended range of -40C
to +125
C, and prefix `UGL' devices over the range of -40C to +150C.
ULTRA-SENSITIVE BIPOLAR
HALL-EFFECT SWITCHES
FEATURES
I 4.5 V to 24 V Operation
I Reverse Battery Protection
I Superior Temperature Stability
I Superior Supply Voltage Stability
I Activate with Multi-Pole Ring Magnets
I Solid-State Reliability
I Small Size
I Constant Output Amplitude
I Resistant to Physical Stress
Data
Sheet
27631.2B
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
Always order by complete part number
including prefix and suffix, e.g., UGN3132LT .
Pinning is shown viewed from branded side.
3132
AND
3133
Dwg. PH-003A
1
SUPPLY
V
CC
GROUND
3
2
OUTPUT
X
3132
AND
3133
BIPOLAR
HALL-EFFECT SWITCHES
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
FUNCTIONAL BLOCK DIAGRAM
V
CC
X
REG.
Dwg. FH-005-2
GROUND
OUTPUT
3
2
1
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage
V
CC
Operating
4.5
--
24
V
Output Saturation Voltage
V
OUT(SAT)
I
OUT
= 20 mA, B
B
OP
--
145
400
mV
Output Leakage Current
I
OFF
V
OUT
= 24 V, B
B
RP
--
<1.010
A
Supply Current
I
CC
V
CC
= 24 V, B
B
RP
--
4.3
9.0mA
Output Rise Time
t
r
V
CC
= 12 V, R
L
= 820
, C
L
= 20 pF
--
0.04
2.0
s
Output Fall Time
t
f
V
CC
= 12 V, R
L
= 820
, C
L
= 20 pF
--
0.18
2.0
s
Limits
Characteristic
Symbol
Device Type*
Min.
Typ.
Max.
Units
Operate Point
B
OP
3132
--
32
95
G
3133
--
32
75
G
Release Point
B
RP
3132
-95
-20--
G
3133
-75
-20--
G
Hysteresis
B
hys
Both
3052
--
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).
ELECTRICAL CHARACTERISTICS at T
A
= +25
C
MAGNETIC CHARACTERISTICS over operating temperature and voltage range.
Copyright 1996,1999, Allegro MicroSystems, Inc.
3132
AND
3133
BIPOLAR
HALL-EFFECT SWITCHES
www.allegromicro.com
Dimensions in Millimeters
(controlling dimensions)
Dwg. MA-009-3A in
1
2
3
0.072
0.064
0.167
0.155
0.059
BSC
0.0189
0.0142
0.047
0.035
0.102
0.090
0.063
0.055
0.0173
0.0138
0.090
0.084
0.0221
0.0173
0.118
BSC
0.181
0.173
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.
PACKAGE DESIGNATOR `LT'
(SOT-89/TO-243AA)
Dimensions in Inches
(for reference only)
Dwg. MA-009-3A mm
1
2
3
4.60
4.40
1.83
1.62
4.25
3.94
1.50
BSC
0.48
0.36
1.20
0.89
2.60
2.29
1.60
1.40
0.44
0.35
2.29
2.13
0.56
0.44
3.00
BSC
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