type UGN3275k latching hall-effect sensors are bipolar inte- grated 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. 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. if the hall cell is exposed to a magnetic flux density greater than the operate threshold (b op ), 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 (b rp ) 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 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 always order by complete part number: UGN3275k . dwg. ph-002 1 supply v cc 4 ground 3 2 output output x pinning is shown viewed from branded side. absolute maximum ratings power supply, v cc . . . . . . . . . . . . . . . . 25 v magnetic flux density, b . . . . . . unlimited output off voltage, v out . . . . . . . . . . 25 v output on current, i out . . . . . . . . . . 50 ma operating temperature range, t a . . . . . . . . . . . . . . . . . -20 c to +85 c storage temperature range, t s . . . . . . . . . . . . . . . . -65 c to +150 c complementary-outputs hall-effect latch 3275 data sheet 27632.2?
3275 complementary-outputs hall-effect latch 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 sensor location functional block diagram dwg. fh-002 ground v cc x output 3 2 output reg. 1 4 a 1 4 3 2 dwg. mh-001-2b 0.0165" 0.42 mm nom 0.047" 1.21 mm branded surface active area depth 0.096" 2.44 mm copyright ?1991, 2002 allegro microsystems, inc. characteristic symbol test conditions min. typ. max. units supply voltage v cc operating 4.5 24 v output saturation voltage v out(sat) v cc = 4.5 v, i out = 20 ma, b > b op 400 mv output leakage current i off v out = 24 v, v cc = 24 v, b < b rp 10 a supply current l cc v cc = 24 v, b < b rp 7.0ma output rise time t r v cc = 12 v, r l = 820 ? , c l = 20 pf 0.04 0.4 s output fall time t f v cc = 12 v, r l = 820 ? , c l = 20 pf 0.18 0.4 s electrical characteristics at t a = +25 c, v cc = 4.5 v to 24 v (unless otherwise noted). magnetic characteristics t a = +25 ct a = -20 c to +85 c characteristic symbol min. max. min. max. units operate point b op 25 250 15 250 g release point b rp -250 -25 -250 -15 g hysteresis b hys 100 100 g notes: 1. as used here, negative flux densities are defined as less than zero (algebraic convention). 2. 1 gauss (g) is exactly equal to 0.1 millitesla (mt).
3275 complementary-outputs hall-effect latch dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) 45 dwg. mh-009d in 0.063 0.059 0.033 0.0173 0.0138 0.0189 0.0142 0.050 bsc 1234 45 see note 0.208 0.203 0.138 0.133 0.600 0.560 0.085 max 45 dwg. mh-009d mm 1.60 1.50 0.84 0.44 0.35 0.48 0.36 1.27 bsc 1234 45 see note 5.28 5.16 3.51 3.38 15.24 14.23 2.16 max surface-mount lead form (suffix -tl) 2.41 0.13 0.51 min flat dwg. mh-015 mm 0.10 max 0.051 max 0 8 0.095 0.005 0.020 min flat dwg. mh-015 in 0.004 max 0.002 max 0 8 notes: 1. tolerances on package height and width represent allowable mold offsets. dimensions given are measured at the widest po int (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).
3275 complementary-outputs hall-effect latch 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 hall-effect sensors latching hall-effect digital switches partial operate release hysteresis replaces part point (g) point (g) (g) oper. and number over oper. voltage & temp. range temp. packages comments ugn3175 15 to 180 -180 to -15 >80 (typ 180) s lt, ua ugn3177 25 to 150 -150 to -25 >50 (typ 180) s lt, ua a3185x 140 to 300 -300 to -140 280 to 600 e/l lt, ua a3187x 50 to 175 -175 to -50 100 to 350 e/l lt, ua 3077, 3175, 3177 a3188x 80 to 200 -200 to -80 160 to 400 e/l lt, ua a3189x 50 to 250 -250 to -50 100 to 500 e/l lt, ua 3075, 3076 a3280x 5 to 40 -40 to -5 10 to 80 e/l lh, lt, ua chopper stabilized a3281x 15 to 90 -90 to -15 30 to 180 e/l lh, lt, ua chopper stabilized a3283x 100 to 180 -180 to -100 <400 (typ 300) e/l lh, lt, ua chopper stabilized protected latching hall-effect digital switches partial operate release hysteresis part point (g) point (g) (g) oper. number over oper. voltage & temp. range temp. packages comments a3195x 40 to 200 -200 to -40 >110 (typ 220) e, l u, lt active pulldown a3197x 40 to 200 -200 to -40 >110 (typ 230) e, l u, lt open-collector output notes: 1) typical data is at t a = +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. 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 responsi- bility for its use; nor for any infringements of patents or other rights of third parties that may result from its use.
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