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3175 AND 3177
HALL-EFFECT LATCHES
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. The three package styles available provide a magnetically optimized package for most applications. Suffix `LT' is a surface-mount SOT-89/ TO-243AA package; suffixes `U' and `UA' feature wire leads for through-hole mounting.
Data Sheet 27609.4B
V
X
CC
1
2
3
GROUND
OUTPUT
SUPPLY
FEATURES
I Symmetrical Response I 4.5 V to 18 V Operation I Open-Collector Output I Reverse Battery Protection I Activate With Small, Commercially Available Permanent Magnets I Solid-State Reliability I Small Size I Superior Temperature Stability I Resistant to Physical Stress
Dwg. PH-003A
Pinning is shown viewed from branded side.
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 . . . . . . . . . . . . . . . -20C to +85C Storage Temperature Range, TS . . . . . . . . . . . . . . . -65C to +150C
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 GROUND
2
Dwg. FH-005-2
ELECTRICAL CHARACTERISTICS at TA = +25C, VCC = 4.5 V to 18 V (unless otherwise noted).
Limits Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Fall Time Symbol VCC VOUT(SAT) IOFF ICC tr tf Test Conditions Operating VCC = 18 V, IOUT = 10 mA, B > BOP VOUT = 18 V, B < BRP VCC = 4.5 V, B < BRP (Output OFF) VCC = 12 V, RL = 1.1 k, CL = 20 pF VCC = 12 V, RL = 1.1 k, CL = 20 pF Min. 4.5 -- -- -- -- -- Typ. -- 200 0.05 5.0 0.04 0.18 Max. 18 400 5.0 10 2.0 2.0 Units V mV A mA s s
MAGNETIC CHARACTERISTICS in gauss; VCC = 4.5 V to 18 V.
Characteristic Operate Point, BOP Part Number* UGN3175 UGN3177 Release Point, BRP UGN3175 UGN3177 Hysteresis, Bhys UGN3175 UGN3177 TA = +25C Min. 25 50 -170 -150 100 100 Typ. -- -- -- -- 200 200 Max. 170 150 -25 -50 -- -- Min. 15 25 -180 -150 80 50 TA = -20C to +85C Typ. -- -- -- -- 180 180 Max. 180 150 -15 -25 -- --
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, U, or UA).
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1991, 2001 Allegro MicroSystems, Inc.
3175 AND 3177 HALL-EFFECT LATCHES
SENSOR LOCATIONS
(0.005" [0.13mm] die placement) Suffix "LT"
ACTIVE AREA DEPTH 0.030" 0.76 mm NOM 0.090" 2.30 mm 0.045" 1.15 mm
200
TYPICAL OPERATING CHARACTERISTICS
OPERATE POINT
SWITCH POINT IN GAUSS
100
V 0
CC
= 14 V
A
1 2 3
-100
RELEASE POINT
Dwg. MH-008-1B
-200
-30
-10
10
30
50
70
90
Suffix "U"
ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 0.092" 2.35 mm
AMBIENT TEMPERATURE IN C
Dwg. GH-020
0.072" 1.83 mm
A
BRANDED SURFACE 1 2 3
Dwg. MH-002-3B
Suffix "UA"
ACTIVE AREA DEPTH 0.018" 0.46 mm NOM 0.083" 2.12 mm
A
A
BRANDED SURFACE 1 2 3
0.055" 1.39 mm
Dwg. MH-011B
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3175 AND 3177 HALL-EFFECT LATCHES
PACKAGE DESIGNATOR `LT'
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. Exact body and lead configuration at vendor's option within limits shown. 2. Supplied in bulk pack of 500 pieces per bag or add "TR"to part number for tape and reel (1000 devices).
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3175 AND 3177 HALL-EFFECT LATCHES
PACKAGE DESIGNATOR `U'
Dimensions in Inches (controlling dimensions)
0.183 0.178 0.063 0.059
Dimensions in Millimeters (for reference only)
4.65 4.52 1.60 1.50
0.181 0.176 45 0.086
MAX
4.60 4.47 45 2.18
MAX
1
2
3
0.018
1
2
3
0.46
0.600 0.560 0.0189 0.0142
SEE NOTE
0.0173 0.0138
15.24 14.23 0.48 0.36
SEE NOTE
0.44 0.35
0.050 0.100
Dwg. MH-003E in
1.27 2.54
Dwg. MH-003E mm
Devices in the `U' package are NOT RECOMMENDED FOR NEW DESIGN
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. Supplied in bulk pack of 500 pieces per bag.
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3175 AND 3177 HALL-EFFECT LATCHES
PACKAGE DESIGNATOR `UA'
Dimensions in Inches (controlling dimensions)
0.164 0.159
Dimensions in Millimeters (for reference only)
4.17 4.04
45
0.062 0.058
45
1.57 1.47
0.122 0.117 45 0.031
3.10 2.97 45 0.79
0.085
MAX
1
2
3
2.16
MAX
1
2
3
0.640 0.600
0.0173 0.0138
16.26 15.24
0.44 0.35
SEE NOTE
0.0189 0.0142
SEE NOTE
0.48 0.36
0.050
BSC
Dwg. MH-014E in
1.27
BSC
Dwg. MH-014E mm
Surface-Mount Lead Form (add `-TL' or `-TS' to part number).
0.095
0.005
2.41
0.13
0.002
MAX
0.051
MAX
0.004 0-8
MAX
0.020
MIN FLAT
Dwg. MH-015 in
0.10
MAX
0-8 0.51
MIN FLAT
Dwg. MH-015 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. 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 (no suffix or suffix `-TL', 500 pieces per bag) or tape and reel (suffix `-TS', 4000 devices per reel).
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3175 AND 3177 HALL-EFFECT LATCHES
HALL-EFFECT SENSORS
Partial Part Number 3240 3209 3210 3361 3362 3161 3141 3235 5140 3142 3143 3144 3122 3123 3121 Avail. Oper. Characteristics at TA = +25C Temp. BOP max BRP min Bhys typ E/L E E E E E E/L S E E/L E/L E/L E/L E/L E/L +50 60 60 +125 +125 +160 +160 +175 -25 +200 +230 +340 +350 +400 +440 +450 +5.0 5.0 5.0 +40 +40 +30 +10 +25 -175 +50 +75 +165 +50 +140 +180 +125 10 7.7 7.7 5.0* 5.0* 20 55 15* 15* 55 55 55 55 105 105 105 Features Notes HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of BOP and Bhys chopper stabilized 1 400 W, chopper stabilized 25 W, chopper stabilized 2-wire, chopper stabilized, inverted output 2-wire, chopper stabilized 2-wire output 1 output 2 300 mA power driver output 2 2 1
HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys 3260 E/L +30 -30 20 bipolar switch, chopper stabilized 3280 E/L +40 -40 45 chopper stabilized 3134 E/L +50 -50 27 bipolar switch 3133 K/L/S +75 -75 52 bipolar switch 3281 E/L +90 -90 100 chopper stabilized 3132 K/L/S +95 -95 52 bipolar switch 3187 E/L +150 -150 100* 3177 S +150 -150 200 3195 E/L +160 -160 220 active pulldown 1 3197 L +160 -160 230 1 3175 S +170 -170 200 3188 E/L +180 -180 200* 3283 E/L +180 -180 300 chopper stabilized 3189 E/L +230 -230 100* 3275 S +250 -250 100* 3 3185 E/L +270 -270 340* Operating Temperature Ranges: S = -20C to +85C, E = -40C to +85C, J = -40C to +115C, K = -40C to +125C, L = -40C to +150C Notes 1. Protected. 2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. Outputs may be tied together for omnipolar operation. 3. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. * Minimum. Maximum Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal for reliable operation over operating temperature range.
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3175 AND 3177 HALL-EFFECT LATCHES
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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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