3175 and 3177: Hall-Effect Latches

A3175 and A3177
Hall Effect Latches
Discontinued Product
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: October 31, 2005
Recommended Substitutions:
For new customers and applications:
• for the A3175, refer to the A1211
• for the A3177, refer to the A1210
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a
product to accommodate changes in production capabilities, alternative product availabilities, or market demand. 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 which may result from its use.
Data Sheet
27609.4d
3175 AND
3177
HALL-EFFECT LATCHES
X
These Hall-effect latches are temperature-stable and stress-resistant
sensor ICs 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.
CC
2
3
OUTPUT
SUPPLY
1
GROUND
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
ELEMENT LOCATIONS
(±0.005” [0.13mm] die placement)
Suffix “LT”
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
200
0.045"
1.15 mm
A
1
2
3
SWITCH POINT IN GAUSS
0.090"
2.30 mm
100
OPERATE POINT
V CC = 14 V
0
-100
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
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