tc54 series tc54-13 8/23/99 telcom semiconductor reserves the right to make changes in the circuitry and specifications to its dev ices. features n precise detection thresholds .... standard 2.0% custom 1.0% n small packages ......3-pin sot-23a, 3-pin sot-89, 3-pin to-92 n low current drain ..................................... typ. 1 m a n wide detection range .......................... 1.1v to 6.0v n wide operating voltage range ............ 0.7v to 10v applications n battery voltage monitoring n microprocessor reset n system brownout protection n switching circuit in battery backup n level discriminator general description the tc54 series are cmos voltage detectors, suited especially for battery-powered applications because of their extremely low 1 m a operating current and small surface- mount packaging. each part is laser trimmed to the desired threshold voltage which can be specified from 1.1v to 6.0v, in 0.1v steps for a 2% and 1.5v to 6.0v for a 1% tolerance. the device includes a comparator, low-current high- precision reference, laser-trimmed divider, hysteresis circuit and output driver. the tc54 is available with either an open- drain or complementary output stage. in operation, the tc54's output (v out ) remains in the logic high state as long as v in is greater than the specified threshold voltage (v C det ). when v in falls below v C det , the output is driven to a logic low. v out remains low until v in rises above v C det by an amount v hyst , whereupon it resets to a logic high. functional block diagram voltage detector output form: n = nch open drain c = cmos output detected voltage: ex: 15 = 1.5v; 60 = 6.0v 1.0% tol. ex: 11 = 1.1v; 60 = 6.0v 2.0% tol. extra feature code: fixed: 0 tolerance: 1 = 1.0% (custom) 2 = 2.0% (standard) temperature: e: C 40 c to + 85 c package type and pin count: cb: 3-pin sot-23a*, mb: 3-pin sot-89, zb: 3-pin to-92 taping direction: tr: standard taping rt: reverse taping no suffix: to-92 bulk * 3-pin sot-23a is equivalent to eiaj sc-59. ordering information part code tc54 v x xx x x x xx xxx v out tc54vc only v ss 1 3 + v in 2 v ref tc54vn has open-drain output. tc54vc has complementary output. pin configurations 13 2 v in v in v ss v in v ss v out v ss v out v out tc54 tc54 tc54 1 1 2 3 3 2 *3-pin sot-23a 3-pin sot-89 3-pin to-92 *sot-23a-3 is equivalent to eiaj sc-59
2 tc54-13 8/23/99 tc54 series voltage detector electrical characteristics: t a = 25 c, unless otherwise specified. symbol parameter test conditions min typ max unit v in operating voltage v C det = 0.8 to 6.0v 0.7 10.0 v i ss quiescent current v in = 2.1v 1.0 3.0 3.0v 1.3 3.4 m a 4.0v 1.6 3.8 5.0v 2.0 4.2 v C det threshold voltage (v C det )(v C det )v x 0.98 x 1.02 v hyst hysteresis range (v C det )(v C det )(v C det )v x 0.02 x 0.05 x 0.08 i out output current v ol = 0.5v v in = 2.1v 7.7 ma 3.0v 10.1 4.0v 11.5 5.0v 13.0 tc54vc only: v oh = v in C 2.1v v in = 8.0v C 10.0 t c (v C det ) tempco of (v C det ) C 40 c t a 85 c 100 ppm/ c absolute maximum ratings* supply voltage v in ......................................................12v output voltage: cmos ............. (v ss C 0.3) to (v in + 0.3 ) open drain ................ (v ss C 0.3) to 12v output current ......................................................... 50ma power dissipation: (t a 70 c) 3-pin sot-23a ...............................................240mw 3-pin sot-89 .................................................. 400mw 3-pin to-92 .................................................... 440mw operating temperature .......................... C 40 c to + 85 c storage temperature ........................... C 65 c to + 150 c soldering temperature (10 sec) ............................. 300 c * static-sensitive device. unused devices must be stored in conductive material. protect devices from static discharge and static fields. stresses above those listed under absolute maximum ratings may cause perma- nent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. pin no. symbol description 1v out digital output. this output goes low when v in drops below v C det and returns high when v in rises above v C det + v hyst . (see timing chart). 2v in analog input. this pin is both the power supply input and the voltage to be monitored. 3v ss ground terminal. pin description
3 tc54-13 8/23/99 tc54 series voltage detector timing chart marking 8 12 4 7 11 3 6 10 2 5 9 1 v in detect voltage v det minimum operating voltage v hyst v det output voltage release voltage reset voltage or ground level ground level + a = output (nch or cmos) plus first voltage digit 123456 nch lmnprs cmos b c d e f h ex: cmos 3.x = uuuu b = first voltage decimal (0-9) ex: cmos 3.4 = uuuu c & d = assembly lot number d d4 a , b & c = 54x (fixed) d = output (c = cmos, n = nch) e = first voltage digit (2-6) f = first voltage decimal (0-9) g = extra feature code : fixed : 0 h = detecting accuracy 1 = 1.0% (custom), 2 = 2.0% (standard) i , j , k & l = assembly lot number 3-pin sot-89 3-pin sot-23a 3-pin to-92 description of operation refer to the timing chart below. in normal steady-state operation, when v in > v C det , the output will be at a logic high. in the case of the tc54v, this is an open-drain condition. if and when the input falls below v C det , the output will pull down (logic 0) to v ss . generally, v out can pull down to within 0.5v of v ss at rated output current and input voltage. (see the electrical characteristics section). the output, v out , will stay valid until the input voltage falls below the minimum operating voltage, v in (min), of 0.7v. below this minimum operating voltage, the output is undefined. during power-up or anytime v in has fallen below v in (min), v out will remain undefined until v in rises above v in (min), at which time the output will become valid. v out will be in its active low state while v in (min) < v in < v + det . ( v + det = v C det + v hyst ). if and when the input rises above v + det , the output will assume its inactive state. (high for tc54vc, open-drain for tc54vn). applications refer to telcom semiconductor application note #2, using the tc54 voltage detector .
4 tc54-13 8/23/99 tc54 series voltage detector taping forms component taping orientation for 3-pin sot-89 component taping orientation for 3-pin sot-23a(eiaj sc-59) devices user direction of feed user direction of feed device marking device marking pin 1 pin 1 standard reel component orientation for 713 or tr suffix device (mark right side up) reverse reel component orientation for 723 or rt suffix device (mark upside down) w = width of carrier tape p = pitch package carrier width (w) pitch (p) part per full reel reel size 3-pin sot-89 12 mm 8 mm 1000 7 in carrier tape, reel size, and number of components per reel w = width of carrier tape user direction of feed user direction of feed device marking device marking pin 1 p = pitch pin 1 standard reel component orientation for 713 or tr suffix device (mark right side up) reverse reel component orientation for 723 or rt suffix device (mark upside down) package carrier width (w) pitch (p) part per full reel reel size 3-pin sot-23a 8 mm 4 mm 3000 7 in carrier tape, reel size, and number of components per reel
5 tc54-13 8/23/99 tc54 series voltage detector taping forms (cont.) mark face component taping orientation for 3-pin to-92 devices user direction of feed seal tape back tape m ark f ace m ark f ace m ark f ace w = width of carrier tape p = pitch package carrier width (w) pitch (p) part per full reel reel size 3-pin to-92 18 mm 12.7 mm 1000 14 in carrier tape, reel size, and number of components per reel
6 tc54-13 8/23/99 tc54 series voltage detector taping forms (cont.) seal tape back tape marked face component taping orientation for 3-pin to-92 (cont.) package dimensions dimensions: inches (mm) 3-pin sot-23a (eiaj sc-59) .071 (1.80) .055 (1.40) .118 (3.00) .098 (2.50) .020 (0.50) .012 (0.30) .075 (1.90) reference .122 (3.10) .106 (2.70) .051 (1.30) .035 (0.90) .006 (0.15) .000 (0.00) .022 (0.55) .014 (0.35) 10 max. .010 (0.25) .004 (0.09)
7 tc54-13 8/23/99 tc54 series voltage detector .072 (1.83) .064 (1.62) .181 (4.60) .173 (4.40) .022 (0.56) .017 (0.44) .019 (0.48) .014 (0.36) .062 (1.60) .056 (1.40) .047 (1.20) .035 (0.89) .102 (2.60) .090 (2.29) .167 (4.25) .155 (3.94) .017 (0.44) .014 (0.35) .063 (1.60) .055 (1.40) 3-pin sot-89 package dimensions (cont.) 3-pin to-92 .105 (2.67) .095 (2.41) .018 (0.46) .015 (0.38) .135 (3.43) min. .500 (12.70) min. .210 (5.33) .170 (4.32) .205 (5.21) .175 (4.45) () .125 (3.18) .105 (2.67) .080 (2.03) .055 (1.40) .045 (1.14) .018 (0.46) .015 (0.38) dimensions: inches (mm) printed in the u.s.a. sales offices telcom semiconductor, inc. 1300 terra bella avenue p.o. box 7267 mountain view, ca 94039-7267 tel: 650-968-9241 fax: 650-967-1590 e-mail: liter@telcom-semi.com telcom semiconductor, gmbh lochhamer strasse 13 d-82152 martinsried germany tel: (011) 49 89 895 6500 fax: (011) 49 89 895 6502 2 telcom semiconductor h.k. ltd. 10 sam chuk street, ground floor san po kong, kowloon hong kong tel: 852-2324-0122 fax: 852-2354-9957
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