Data Sheet
27609.4C
3175 AND
3177
HALL-EFFECT LATCHES
X
These Hall-effect latches are temperature-stable and stress-resistant
sensors especially suited for electronic commutation in brushless dc
motors using multipole ring magnets. Each device includes a voltage
regulator, quadratic Hall voltage generator, temperature compensation
circuit, signal amplifier, Schmitt trigger, and an open-collector output on
a single silicon chip. The on-board regulator permits operation with
supply voltages of 4.5 volts to 18 volts. The switch output can sink
10 mA. With suitable output pull up, they can be used directly with
bipolar or MOS logic circuits.
2
3
OUTPUT
1
GROUND
CC
SUPPLY
V
Dwg. PH-003A
Pinning is shown viewed from branded side.
The three package styles available provide a magnetically optimized
package for most applications. Suffix ‘LT’ is a surface-mount SOT89/
TO-243AA package; suffixe ‘UA’ features wire leads for through-hole
mounting.
FEATURES
■ Symmetrical Response
■ 4.5 V to 18 V Operation
■ Open-Collector Output
■ Reverse Battery Protection
■ Activate With Small, Commercially Available Permanent Magnets
■ Solid-State Reliability
■ Small Size
■ Superior Temperature Stability
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC . . . . . . . . . . . . . 18 V
Reverse Battery Voltage, VRCC . . . . -18 V
Magnetic Flux Density, B . . . . Unlimited
Output OFF Voltage, VOUT . . . . . . . . 18 V
Continuous Output Current, IOUT . 15 mA
Operating Temperature Range,
TA . . . . . . . . . . . . . . . -20°C to +85°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . -65°C to +150°C
■ Resistant to Physical Stress
Always order by complete part number, e.g., UGN3175LT .
See Magnetic Characteristics table for differences between devices.
3175 AND 3177
HALL-EFFECT
LATCHES
FUNCTIONAL BLOCK DIAGRAM
1
VCC
REG.
X
3
OUTPUT
2
GROUND
Dwg. FH-005-2
ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 4.5 V to 18 V (unless otherwise noted).
Limits
Characteristic
Symbol
Supply Voltage
VCC
Output Saturation Voltage
Test Conditions
VOUT(SAT)
Min.
Typ.
Max.
Units
Operating
4.5
—
18
V
VCC = 18 V, IOUT = 10 mA, B > BOP
—
200
300
mV
Output Leakage Current
IOFF
VOUT = 18 V, B < BRP
—
0.05
5.0
µA
Supply Current
ICC
VCC = 4.5 V, B < BRP (Output OFF)
—
5.0
10
mA
Output Rise Time
tr
VCC = 12 V, RL = 1.1 kΩ, CL = 20 pF
—
0.04
2.0
µs
Output Fall Time
tf
VCC = 12 V, RL = 1.1 kΩ, CL = 20 pF
—
0.18
2.0
µs
MAGNETIC CHARACTERISTICS in gauss; VCC = 4.5 V to 18 V.
TA = +25°C
TA = -20°C to +85°C
Characteristic
Part
Number*
Min.
Typ.
Max.
Min.
Typ.
Max.
Operate Point, BOP
UGN3175
25
—
170
15
—
180
UGN3177
50
—
150
25
—
150
UGN3175
-170
—
-25
-180
—
-15
UGN3177
-150
—
-50
-150
—
-25
UGN3175
100
200
—
80
180
—
UGN3177
100
200
—
50
180
—
Release Point, BRP
Hysteresis, Bhys
NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention).
Complete part number includes a suffix denoting package type (LT or UA).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1991, 2002 Allegro MicroSystems, Inc.
3175 AND 3177
HALL-EFFECT
LATCHES
TYPICAL OPERATING CHARACTERISTICS
SENSOR LOCATIONS
(±0.005” [0.13mm] die placement)
Suffix “LT”
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
200
0.090"
2.30 mm
0.045"
1.15 mm
A
1
2
3
SWITCH POINT IN GAUSS
OPERATE POINT
100
V
0
-100
CC
= 14 V
RELEASE POINT
-200
Dwg. MH-008-1C
-30
-10
10
30
50
70
90
AMBIENT TEMPERATURE IN °C
Suffix “UA”
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
Dwg. GH-020
0.083"
2.12 mm
0.055"
1.39 mm
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011C
The products described herein are manufactured under one or
more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be
required to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support appliances, devices, or systems without express written
approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
www.allegromicro.com
3175 AND 3177
HALL-EFFECT
LATCHES
PACKAGE DESIGNATOR ‘LT’
(SOT89/TO-243AA)
Dimensions in Inches
(for reference only)
0.181
0.173
0.072
0.064
0.167
0.155
1
2
0.063
0.055
3
0.102
0.090
Dimensions in Millimeters
(controlling dimensions)
0.0173
0.0138
0.090
0.084
4.25
3.94
0.0189
0.0142
0.0221
0.0173
0.047
0.035
0.059
4.60
4.40
1.83
1.62
3.00
BSC
Dwg. MA-009-3A in
B
0.031
A
Dwg. MA-009-3A mm
2.5
2.0
0.098
0.079
B
0.102
0.8
2.6
A
4.6
0.181
1
2
2.29
2.13
0.56
0.44
1.50
0.118
BSC
2.60
2.29
3
0.44
0.35
0.48
0.36
1.20
0.89
BSC
BSC
2
1
1.60
1.40
3 0.047
1
2
3
1.2
0.028
0.031
0.7
0.8
TYP
TYP
TYP
TYP
Pads 1, 2, 3, and A — Standard SOT89 Layout
Pads 1, 2, 3, and B — Low-Stress Version
Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning
Pads 1, 2, 3, and A — Standard SOT89 Layout
Pads 1, 2, 3, and B — Low-Stress Version
Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning
Dwg. MA-012-3 in
Dwg. MA-012-3 mm
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Supplied in bulk pack (500 pieces per bag) or add "TR" to part number for tape and reel.
3. Only low-temperature (≤240°C) reflow-soldering techniques are recommended for SOT89 devices.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3175 AND 3177
HALL-EFFECT
LATCHES
PACKAGE DESIGNATOR ‘UA’
Dimensions in Millimeters
(for reference only)
Dimensions in Inches
(controlling dimensions)
0.164
0.159
4.17
4.04
0.062
0.058
45°
1.57
1.47
45°
0.122
0.117
3.10
2.97
45°
45°
0.085
1
2
3
0.031
2.16
1
2
0.79
3
MAX
MAX
0.640
0.600
16.26
15.24
0.0173
0.0138
0.0189
0.0142
SEE NOTE
0.44
0.35
0.48
0.36
SEE NOTE
1.27
0.050
BSC
BSC
Dwg. MH-014E in
Dwg. MH-014E mm
Radial Lead Form (order A317xxUA-LC)
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.
4. Recommended minimum PWB hole diameter to clear
transition area is 0.035" (0.89 mm).
5. Where no tolerance is specified, dimension is nominal.
6. Supplied in bulk pack (500 pieces per bag).
1
2
3
0.108"
(2.74 mm)
0.620"
0.500"
(15.7 mm
12.7 mm)
0.100"
(2.5 mm)
Dwg. MH-026
NOTE: Lead-form dimensions are the nominals produced on the
forming equipment. No dimensional tolerance is implied or
guaranteed for bulk packaging (500 pieces per bag).
www.allegromicro.com
3175 AND 3177
HALL-EFFECT
LATCHES
HALL-EFFECT SENSORS
UNIPOLAR HALL-EFFECT DIGITAL SWITCHES
Partial
Part
Number
A3121x
A3122x
A3123x
A3141x
A3142x
A3143x
A3144x
A3161E
A3163E
A3240x
A3250x
A3251x
Operate
Release
Hysteresis
Point (G)
Point (G)
(G)
Over Oper. Voltage & Temp. Range
220 to 500
80 to 410
260 to 430
120 to 360
230 to 470
160 to 330
30 to 175
10 to 145
115 to 245
60 to 190
205 to 355
150 to 300
35 to 450
25 to 430
<160 (Typ 130) >30 (Typ 110)
<160 (Typ 98) >30 (Typ 79)
<50 (Typ 35)
>5 (Typ 25)
<50 to >350
_
<50 to >350
_
Oper.
Temp.
60 to 150
70 to 140
70 to 140
20 to 80
30 to 80
30 to 80
>20
5 to 80
5 to 40
Typ 10
5 to 35
5 to 35
E, L
E, L
E, L
E, L
E, L
E, L
E, L
E
E
E, L
J, L
J, L
A3361E
<125
>40
5 to 30
E
A3362E
<125
>40
5 to 30
E
Replaces
and
Comments
Packages
LT, UA
3019, 3113, 3119
LT, UA
LT, UA
LT, UA
3040, 3140
LT, UA
LT, UA
LT, UA
3020, 3120
LT, UA
2-wire operation
LT, UA
2-wire
LH, LT, UA
chopper stabilized
UA
programmable, chopper stabilized
UA
programmable, chopper stabilized
2-wire, chopper stabilized,
LH, LT, UA
output normally high
2-wire, chopper stabilized,
LH, LT, UA
output normally low
MICROPOWER OMNIPOLAR HALL-EFFECT DIGITAL SWITCHES
Partial
Part
Number
Operate
Release
Hysteresis
Points (G)
Points (G)
(G)
Over Oper. Voltage & Temp. Range
A3209E
A3210E
A3212E
>-60, <60
>-60, <60
>-55, <55
<-5, >5
<-5, >5
<-10, >10
Typ 7.7
Typ 7.7
Typ. 8
Oper.
Temp.
Packages
Average
Supply
Current (µA)
E
E
E
LH, UA
LH, UA
LH, UA
<425 (Typ 145)
<60 (Typ 8.8)
<10 (Typ 4.2)
BIPOLAR HALL-EFFECT DIGITAL SWITCHES
Partial
Part
Number
UGx3132
UGx3133
UGx3134
A3260x
Operate
Release
Hysteresis
Point (G)
Point (G)
(G)
Over Oper. Voltage & Temp. Range
<95 (Typ 32)
<75 (Typ 32)
-40 to 50
<30 (Typ 10)
>-95 (Typ -20) >30 (Typ 52)
>-75 (Typ -20) >30 (Typ 52)
-50 to 40
5 to 55
>-30 (Typ -10)
Typ 20
Oper.
Temp.
Packages
K, L, S
K, L, S
E, L
E, L
LT, UA
LT, UA
LT, UA
LH, LT, UA
Replaces
and
Comments
3030, 3130, 3131
2 wire, chopper stabilized
Notes: 1) Typical data is at TA = +25°C and nominal operating voltage.
2) “x” = Operating Temperature Range [suffix letter or (prefix)]: S (UGN) = -20°C to +85°C, E = -40°C to +85°C,
J = -40°C to +115°C, K (UGS) = -40°C to +125°C, L (UGL) = -40°C to +150°C.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000