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