Data Sheet 27632.2 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH X Type UGN3275K latching Hall-effect sensors are bipolar integrated circuits designed for electronic commutation of brushless dc motors. They feature dual complementary outputs. The latches are typically used to sense matched magnetic flux densities of alternating polarity from multipole ring magnets. 2 3 OUTPUT 4 GROUND 1 OUTPUT CC SUPPLY V Each sensor IC includes a Hall voltage generator, operational amplifier, Schmitt trigger, voltage regulator, and dual bipolar output transistors. The regulator allows use of the integrated circuit with supply voltages of 4.5 V to 24 V. Dwg. PH-002 Pinning is shown viewed from branded side. If the Hall cell is exposed to a magnetic flux density greater than the operate threshold (BOP), OUTPUT goes low (turns on) and OUTPUT goes high (turns off). The outputs will hold (latch) this state until magnetic field reversal exposes the Hall cell to a magnetic flux density below the release threshold (BRP) when OUTPUT will go high (off) and OUTPUT will go low (on). This state is also latched. Under any condition one output is on while the other is off. Because the operating state switches only with magnetic field reversal, and not merely with a change in the strength, these integrated circuits qualify as true Hall-effect latches. These complementary-output Hall-effect latches are supplied in a four-pin plastic SIP, 0.200" (5.08 mm) wide, 0.130" (3.3 mm) high, and 0.060" (1.54 mm) thick. FEATURES ABSOLUTE MAXIMUM RATINGS Power Supply, VCC . . . . . . . . . . . . . . . . 25 V Magnetic Flux Density, B . . . . . . Unlimited ■ ■ ■ ■ ■ ■ ■ Operable with Multipole Ring Magnets High Reliability Small Size Output Compatible with All Digital Logic Families 4.5 V to 24 V Operation High Hysteresis Level Minimizes Stray-Field Problems Complementary Outputs Output OFF Voltage, VOUT . . . . . . . . . . 25 V Output ON Current, IOUT . . . . . . . . . . 50 mA Operating Temperature Range, TA . . . . . . . . . . . . . . . . . -20°C to +85°C Storage Temperature Range, TS . . . . . . . . . . . . . . . . -65°C to +150°C Always order by complete part number: UGN3275K . 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH SENSOR LOCATION FUNCTIONAL BLOCK DIAGRAM ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 0.096" 2.44 mm 1 0.047" 1.21 mm X 1 2 3 2 OUTPUT 3 OUTPUT 4 GROUND REG. A BRANDED SURFACE VCC 4 Dwg. FH-002 Dwg. MH-001-2A ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 4.5 V to 24 V (unless otherwise noted). Characteristic Symbol Supply Voltage VCC Output Saturation Voltage VOUT(SAT) Test Conditions Min. Typ. Max. Units Operating 4.5 — 24 V VCC = 4.5 V, IOUT = 20 mA, B > BOP — — 400 mV Output Leakage Current IOFF VOUT = 24 V, VCC = 24 V, B < BRP — — 10 µA Supply Current lCC VCC = 24 V, B < BRP — — 7.0 mA Output Rise Time tr VCC = 12 V, RL = 820 Ω, CL = 20 pF — 0.04 0.4 µs Output Fall Time tf VCC = 12 V, RL = 820 Ω, CL = 20 pF — 0.18 0.4 µs MAGNETIC CHARACTERISTICS TA = +25°C TA = -20°C to +85°C Characteristic Symbol Min. Max. Min. Max. Units Operate Point BOP 25 250 15 250 G Release Point BRP -250 -25 -250 -15 G Hysteresis Bhys 100 — 100 — G NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention). 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1991, 2000 Allegro MicroSystems, Inc. 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) 5.28 5.16 0.208 0.203 0.063 0.059 45° 1.60 1.50 45° 3.51 3.38 0.138 0.133 45° 45° 0.085 1 2 3 4 0.033 2.16 1 2 3 4 0.84 MAX MAX 0.0173 0.0138 0.600 0.560 0.44 0.35 15.24 14.23 SEE NOTE SEE NOTE 0.0189 0.0142 0.48 0.36 0.050 BSC Dwg. MH-009D in 1.27 BSC Dwg. MH-009D 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. 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. 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH HALL-EFFECT SENSORS Partial Part Number Avail. Oper. Characteristics at TA = +25°C Temp. BOP(max) BRP(min) Bhys(typ) Features HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys 3240 3210 3361 3362 3161 3141 3235 E/L E E E E E/L S 5140 3142 3143 3144 3122 3123 3121 3150 E E/L E/L E/L E/L E/L E/L J +50 ±60 +55* +110 +160 +160 +175 -25 +200 +230 +340 +350 +400 +440 +450 +40 to +850 +5.0 ±5.0 +110‡ +55 +30 +10 +25 -175 +50 +75 +165 +50 +140 +180 +125 – 10 7.7 5.0* 5.0* 20 55 15* 15* 55 55 55 55 105 105 105 20 Notes chopper stabilized micropower, chopper stabilized 2-wire, chopper stabilized 2-wire, chopper stabilized 2-wire 1 output 1 output 2 300 mA output 2 2 1, 3 programmable, chopper stabilized 1 † HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys 3260 E/L +30 -30 20 bipolar, 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 3625 S +150 -150 200 900 mA outputs 1, 3, 5 3626 S +150 -150 200 400 mA outputs 1, 3, 5 3195 E/L +160 -160 220 1, 4 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* 5 3185 E/L +270 -270 340* Operating Temperature Ranges: S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C 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. 3. Power driver output. 4. Active pull down. 5. 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000