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microprocessor supervisory circuits in 3-lead sc70 and sot -23 features specified over temperature low power consumption (17 ? a) precision voltage monitor: 2.5 v, 3 v, 3.3 v, 5 v options reset assertion down to 1 v v cc 140 ms min power-on reset open-drain reset output (adm803) push-pull reset output (adm809) push-pull reset output (adm810) sc70 and sot-23 packages applications microprocessor systems computers controllers intelligent instruments automotive systems general description the adm803/adm809/adm810 supervisory circuits monitor the power supply voltage in microprocessor systems. they pro- vide a reset output during power-up, power-down, and brownout condi tions. on power-up, an internal timer holds reset asserted for 240 ms. this holds the microprocessor in a reset state until conditions h ave stabilized. the reset output remains opera- tional with v cc as low as 1 v. the adm803 and adm809 provide an active low reset s i gnal ( reset ), while the adm810 provides an active high signal (reset) output. the adm809 and adm810 have push-pull outputs , whereas the adm803 has an open-drain output, which requires an external pull-up resistor. seven reset threshold voltage options are available, suitable for monitoring a variety of supply voltages. refer to table i. the reset comparator features built-in glitch immunity, making it immune to fast transients on v cc . the adm803/adm809/adm810 consume only 17 m a, making them suitable for low power, portable equipment. the a d m 803 is available in a 3 -lead sc70; the adm809/ adm810 is available in 3-lead sot-23 and sc70 packages. rev. f information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. adm803/adm809/adm810
functional block diagram v cc v ref reset genera t o r 240ms adm803 reset gnd v cc v ref reset genera t o r 240ms adm80 9 / adm810 reset (reset) gnd v cc reset reset input gnd gnd * r pull-up v cc v cc micr opr ocessor system adm80 3 / adm809 * adm803 onl y figure 1. typical operating circuit one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781/329-4700 www.analog.com fax: 781/461-3113 ? 2005 analog devices, inc. all rights reserved.
adm803/adm809/adm810 Cspecifica tions (v cc = full operating range, t a = t min to t max , v cc typ = 5 v for l/m/j models, 3.3 v for t/s models, 3 v for r models, 2.5 v for z models, unless otherwise noted.) parameter min typ max unit test conditions/comments v cc operating voltage range supply current 1.0 1.2 24 17 5.5 5.5 35 30 60 60 v v m a m a m a m a t a = 0 c to 70 c t a = C40 c to +125 c v cc < 5.5 v, adm8_l/m/j, t a = C40 c to +85 c v cc < 3.6 v, adm8_r/s/t/z, t a = C40 c to +85 c v cc < 5.5 v, adm8_l/m/j, t a = 85 c to 125 c v cc < 3.6 v, adm8_r/s/t/z, t a = 85 c to 125 c reset threshold reset voltage threshold adm8_l adm8_l adm8_l adm8_m adm8_m adm8_m adm8_j * adm8_j * adm8_j * adm8_t adm8_t adm8_t adm8_s adm8_s adm8_s adm8_r adm8_r adm8_r adm8_z adm8_z adm8_z 4.56 4.50 4.44 4.31 4.25 4.20 3.93 3.89 3.80 3.04 3.00 2.95 2.89 2.85 2.81 2.59 2.55 2.52 2.28 2.25 2.22 4.63 4.38 4.00 3.08 2.93 2.63 2.32 4.70 4.75 4.82 4.45 4.50 4.56 4.06 4.10 4.20 3.11 3.15 3.21 2.96 3.00 3.05 2.66 2.70 2.74 2.35 2.38 2.42 v v v v v v v v v v v v v v v v v v v v v t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c t a = 25 c t a = C40 c to +85 c t a = C40 c to +125 c reset threshold temperature coefficient 30 ppm/ c v cc to reset delay 20 m s v cc = v th to (v th C 100 mv) reset active timeout period 140 240 460 ms t a = C40 c to +85 c 100 840 ms t a = 85 c to 125 c reset output voltage low 0.3 v v cc = v th min, i sink = 1.2 ma, (adm803/adm809) 0.4 v adm803r/s/t/z, adm809r/s/t/z v cc = v th min, i sink = 3.2 ma, 0.3 v adm803l/m/j, adm809l/m/j v cc > 1.0 v, i sink = 50 m a reset output voltage high 0.8 v cc v v cc > v th max, i source = 500 m a, (adm809) adm809r/s/t/z v cc C 1.5 v v cc > v th max, i source = 800 m a, adm809l/m/j reset output voltage low (adm810) 0.3 v v cc = v th min, i sink = 1.2 ma, adm810r/s/t/z 0.4 v v cc = v th min, i sink = 3.2 ma, adm810l/m/j reset output voltage high (adm810) 0.8 v cc v 1.8 v < v cc < v th m in, i source = 150 m a reset open-drain output leakage current (adm803) 1 m a v cc > v th , reset de-asserted * adm809/adm810 only. C2C rev. f
adm803/adm809/adm810
absolute maximum ratings * pin configuration pin configuration (t a = 25 c, unless otherwise noted.) v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C0.3 v to +6 v reset, reset . . . . . . . . . . . . . . . . . . C0.3 v to v cc + 0.5 v input current v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 0 m a output current reset, reset (push-pull) . . . . . . . . . . . . . . . . . . . 20 ma reset (open drain) . . . . . . . . . . . . . . . . . C0.3 v to +6.0 v rate of rise, v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 v/ m s ? ja thermal impedance, sc70 . . . . . . . . . . . . . . . . . 146 c/w ? ja thermal impedance, sot-23 . . . . . . . . . . . . . . . 270 c/w lead temperature (soldering, 10 sec) . . . . . . . . . . . . . 300 c vapor phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215 c infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 c storage temperature range . . . . . . . . . . . . C65 c to +150 c * stresses above those listed under absolute maximum ratings may cause perma- nent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. exposure to absolute maximum ratings for extended periods of time may affect device reliability. table i. reset threshold options gnd 1 2 top view (not to scale) adm803 / adm809 / adm810 3 v cc reset , reset pin function descriptions pin no. mnemonic function 1 g nd 2 reset (adm803/ adm809) 2 reset (adm810) 0 v. ground reference for all signals. active low logic output. reset remains low while v cc is below the reset threshold and remains low for 240 m s (typ) after v cc rises above the reset threshold. active high logic output. reset model threshold (v) r eset remains high while v cc is below the reset threshold and adm8_l 4.63 remains high for 240 ms (typ) adm8_m 4.38 after v cc rises above the reset adm8_j * 4.00 threshold. adm8_t 3.08 adm8_s 2.93 3 v cc supply voltage being adm8_r 2.63 monitored. adm8_z 2.32 * adm809/adm810 only. v ref v ref v ref v cc reset t 1 t 1 v ref t 1 = reset time = 240ms typ v ref = reset v o l t a ge threshold figure 2. power fail reset timing caution esd (electrostatic discharge) sensitive device. electrostatic charges as high as 4000 v readily accumulate on the human body and test equipment and can discharge without detection. although the adm803/adm809/adm810 feature proprietary esd protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. therefore, proper esd precautions are recommended to avoid performance degradation or loss of functionality. rev. f C3C
adm803/adm809/adm810 ordering guide model threshold reset (v) t emperature range branding quantity package type adm803laks-reel adm803laks-reel7 adm803laksz-reel 1 adm803laksz-reel7 1 adm803maks-reel adm803maks-reel7 adm803maksz-reel 1 adm803maksz-reel7 1 adm803raks-reel adm803raks-reel7 adm803raksz-reel 1 adm803raksz-reel7 1 adm803saks-reel adm803saks-reel7 adm803saksz-reel 1 adm803saksz-reel7 1 adm803taks-reel adm803taks-reel7 adm803taksz-reel 1 adm803taksz-reel7 1 adm803zaks-reel adm803zaks-reel7 adm803zaksz-reel 1 adm803zaksz-reel7 1 4.63 4.63 4.63 4.63 4.38 4.38 4.38 4.38 2.63 2.63 2.63 2.63 2.93 2.93 2.93 2.93 3.08 3.08 3.08 3.08 2.32 2.32 2.32 2.32 C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c m 02 m 02 m6l m6l m 03 m 03 m6j m6j m 07 m 07 m 6m m 6m m 06 m 06 m 50 m 50 m 05 m 05 m 4m m 4m m 08 m 08 m6n m6n 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3 k 10k 3 k 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 adm809-5laksz-reel 1 adm809-5laksz-reel-rl7 1 adm809-5lartz-reel 1 adm809-5lartz-reel-rl7 1 adm809-5saksz-reel 1 adm809-5saksz-reel-rl7 1 adm809-5sartz-reel 1 adm809-5sartz-reel-rl7 1 adm809jaks-reel adm809jaks-reel7 adm809jaksz-reel 1 adm809jaksz-reel7 1 adm809jart-reel adm809jart-reel7 adm809jartz-reel 1 adm809jartz-reel7 1 adm809laks-reel adm809laks-reel7 adm809laksz-reel 1 adm809laksz-reel7 1 adm809lart-reel adm809lart-reel7 adm809lartz-reel 1 adm809lartz-reel7 1 adm809maks-reel adm809maks-reel7 adm809maksz-reel 1 adm809maksz-reel7 1 adm809mart-reel adm809mart-reel7 adm809martz-reel 1 adm809martz-reel7 1 adm809raks-reel adm809raks-reel7 2.63 2.63 2.63 2.63 2.63 2.63 2.63 2.63 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.63 4.63 4.63 4.63 4.63 4.63 4.63 4.63 4.38 4.38 4.38 4.38 4.38 4.38 4.38 4.38 2.63 2.63 C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c m6q m6q m6q m6q m4c m4c m4c m4c m9c m9c m6p m6p 9 jxx 9 jxx m6p m6p m9a m9a m6r m6r 9lxx 9lxx m6r m6r m 9b m 9b m 51 m 51 9mxx 9mxx m 51 m 51 m9f m9f 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3 k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sc70 3-lead sc70 C4C rev. f
rev. f adm803/adm809/adm810 ? ordering guide model threshold reset (v) temperature range branding quantity package type adm809raksz-reel 1 2.63 ?0 c to +125 c m4d 10k 3-lead sc70 adm809raksz-reel7 1 2.63 ?0 c to +125 c m4d 3k 3-lead sc70 adm809rart-reel 2.63 ?0 c to +125 c 9rxx 10k 3-lead sot-23 adm809rart-reel7 2.63 ?0 c to +125 c 9rxx 3k 3-lead sot-23 adm809rartz-reel 1 2.63 ?0 c to +125 c m4d 10k 3-lead sot-23 adm809rartz-reel7 1 2.63 ?0 c to +125 c m4d 3k 3-lead sot-23 adm809saks-reel 2.93 ?0 c to +125 c m9e 10k 3-lead sc70 adm809saks-reel7 2.93 ?0 c to +125 c m9e 3k 3-lead sc70 adm809saksz-reel 1 2.93 ?0 c to +125 cm53 10k 3-lead sc70 adm809saksz-reel7 1 2.93 ?0 c to +125 cm53 3k 3-lead sc70 adm809sart-reel 2.93 ?0 c to +125 c 9sxx 10k 3-lead sot-23 adm809sart-reel7 2.93 ?0 c to +125 c 9sxx 3k 3-lead sot-23 adm809sartz-reel 1 2.93 ?0 c to +125 cm53 10k 3-lead sot-23 adm809sartz-reel7 1 2.93 ?0 c to +125 cm53 3k 3-lead sot-23 adm809taks-reel 3.08 ?0 c to +125 c m9d 10k 3-lead sc70 adm809taks-reel7 3.08 ?0 c to +125 c m9d 3k 3-lead sc70 adm809taksz-reel 1 3.08 ?0 c to +125 cm4k 10k 3-lead sc70 adm809taksz-reel7 1 3.08 ?0 c to +125 cm4k 3k 3-lead sc70 adm809tart-reel 3.08 ?0 c to +125 c 9txx 10k 3-lead sot-23 adm809tart-reel7 3.08 ?0 c to +125 c 9txx 3k 3-lead sot-23 adm809tartz-reel 1 3.08 ?0 c to +125 cm4k 10k 3-lead sot-23 adm809tartz-reel7 1 3.08 ?0 c to +125 cm4k 3k 3-lead sot-23 adm809zaks-reel 2.32 ?0 c to +125 c m9g 10k 3-lead sc70 adm809zaks-reel7 2.32 ?0 c to +125 c m9g 3k 3-lead sc70 adm809zaksz-reel 1 2.32 ?0 c to +125 c m4p 10k 3-lead sc70 adm809zaksz-reel 1 2.32 ?0 c to +125 c m4p 3k 3-lead sc70 adm809zaksz-reel7 1 2.32 ?0 c to +125 c m4p 10k 3-lead sc70 adm809zaksz-reel7 1 2.32 ?0 c to +125 c m4p 3k 3-lead sc70 ADM809ZART-REEl 2.32 ?0 c to +125 c 9zxx 10k 3-lead sot-23 ADM809ZART-REEl7 2.32 ?0 c to +125 c 9zxx 3k 3-lead sot-23 adm809zartz-reel 1 2.32 ?0 c to +125 c m4p 10k 3-lead sot-23 adm809zartz-reel7 1 2.32 ?0 c to +125 c m4p 3k 3-lead sot-23 adm810jaks-reel 4.00 ?0 c to +125 c mac 10k 3-lead sc70 adm810jaks-reel7 4.00 ?0 c to +125 c mac 3k 3-lead sc70 adm810jaksz-reel 1 4.00 ?0 c to +125 c m6v 10k 3-lead sc70 adm810jaksz-reel7 1 4.00 ?0 c to +125 c m6v 3k 3-lead sc70 adm810jart-reel 4.00 ?0 c to +125 c ajxx 10k 3-lead sot-23 adm810jart-reel7 4.00 ?0 c to +125 c ajxx 3k 3-lead sot-23 adm810jartz-reel 1 4.00 ?0 c to +125 c m6v 10k 3-lead sot-23 adm810jartz-reel7 1 4.00 ?0 c to +125 c m6v 3k 3-lead sot-23 adm810laks-reel 4.63 ?0 c to +125 c maa 10k 3-lead sc70 adm810laks-reel7 4.63 ?0 c to +125 c maa 3k 3-lead sc70 adm810laksz-reel 1 4.63 ?0 c to +125 c m6w 10k 3-lead sc70 adm810laksz-reel7 1 4.63 ?0 c to +125 c m6w 3k 3-lead sc70 adm810lart-reel 4.63 ?0 c to +125 c alxx 10k 3-lead sot-23 adm810lart-reel7 4.63 ?0 c to +125 c alxx 3k 3-lead sot-23 adm810lartz-reel 1 4.63 ?0 c to +125 c m6w 10k 3-lead sot-23 adm810lartz-reel7 1 4.63 ?0 c to +125 c m6w 3k 3-lead sot-23 adm810maks-reel 4.38 ?0 c to +125 c mab 10k 3-lead sc70 adm810maks-reel7 4.38 ?0 c to +125 c mab 3k 3-lead sc70 adm810maksz-reel 1 4.38 ?0 c to +125 c m6s 10k 3-lead sc70 adm810maksz-reel7 1 4.38 ?0 c to +125 c m6s 3k 3-lead sc70 adm810mart-reel 4.38 ?0 c to +125 c amxx 10k 3-lead sot-23 adm810mart-reel7 4.38 ?0 c to +125 c amxx 3k 3-lead sot-23 adm810martz-reel 1 4.38 ?0 c to +125 c m6s 10k 3-lead sot-23 adm810martz-reel7 1 4.38 ?0 c to +125 c m6s 3k 3-lead sot-23 adm810raks-reel 2.63 ?0 c to +125 cmaf 10k 3-lead sc70 adm810raks-reel7 2.63 ?0 c to +125 cmaf 3k 3-lead sc70
adm803/adm809/adm810 ordering guide model threshold reset (v) t emperature range branding quantity package type adm810raksz-reel 1 adm810raksz-reel7 1 adm810rart-reel adm810rart-reel7 adm810rartz-reel 1 adm810rartz-reel7 1 adm810saks-reel adm810saks-reel7 adm810saksz-reel 1 adm810saksz-reel7 1 adm810sart-reel adm810sart-reel7 adm810sartz-reel 1 adm810sartz-reel7 1 adm810taks-reel adm810taks-reel7 adm810taksz-reel 1 adm810taksz-reel7 1 adm810tart-reel adm810tart-reel7 adm810tartz-reel 1 adm810tartz-reel7 1 adm810zaks-reel adm810zaks-reel7 adm810zaksz-reel 1 adm810zaksz-reel7 1 adm810zart-reel adm810zart-reel7 adm810zartz-reel 1 adm810zartz-reel7 1 2.63 2.63 2.63 2.63 2.63 2.63 2.93 2.93 2.93 2.93 2.93 2.93 2.93 2.93 3.08 3.08 3.08 3.08 3.08 3.08 3.08 3.08 2.32 2.32 2.32 2.32 2.32 2.32 2.32 2.32 C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c C40 c to +125 c m 52 m 52 arxx arxx m 52 m 52 mae mae m 6t m 6t asxx asxx m 6t m 6t mad mad m4v m4v atxx atxx m4v m4v mag mag m6u m6u azxx azxx m6u m6u 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 3k 3k 10k 3k 10k 3k 10k 3k 10k 3k 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sc70 3-lead sot-23 3-lead sot-23 3-lead sot-23 3-lead sot-23 1 z = pb-free part. C6C rev. f
1 t ypical performance characteristicsCadm803/adm809/adm810 25 30 240.0 235.0 235.5 236.0 236.5 237.0 237.5 238.0 238.5 239.0 239.5 tempera t ure ( ? c) C40 C20 0 2 0 4 0 6 0 80 85 v cc = 5v v cc = 3v po wer-do wn reset ( ? s) suppl y current ( ? a) 20 15 10 5 0
C40 C20 0 2 0 4 0 6 0 8 0 85
tempera t ure ( ? c) tpc 1. supply current vs. temperature (no load) tpc 4. power-down reset delay vs. temperature adm8_r 1.0020 200 C40 C20 0 2 0 4 0 6 0 8 0 8 5
tempera t ure ( ? c)
0.9990 1.0015 1.0010 1.0005 1.0000 0.9995 tempera t ure ( ? c) C40 C20 0 2 0 4 0 6 0 8 0 8 5 tpc 2. power-down reset delay vs. temperature tpc 5. normalized reset voltage threshold vs. adm8_l/m/j temperature 180 v od = v th C v cc v od = 10mv v od v od = 100mv = 20mv v o d = 200mv 180 normalized reset threshold 160 140 120 100 po wer-do wn reset ( ? s) 80 60 40 20 0 v od = v th C v cc v o v od v od v od d = 200mv = 100mv = 20mv = 10mv 2 t t reset output voltage adm809r adm809t suppl y v o l t a ge 5v p-p 1 160 140 120 100 80 60 40 20 0 po wer-do wn reset ( ? s) C40 C20 0 2 0 4 0 6 0 8 0 8 5 ch1 2.00v ch2 2.00v m 200ms ch1 2.00v tempera t ure ( ? c) tpc 3. power-down reset delay vs. temperature tpc 6. reset output voltage vs. supply voltage adm8_t/s/r/z rev. f C7C
adm803/adm809/adm810
400 350 300 250 200 150 100 50 reset comp ara t or o verdrive, v th C v cc (m v ) adm8_l/m/j 0 1 1 0 1000 100 adm8_r/s/t/z tpc 7. maximum transient duration without causing a reset pulse vs. reset comparator overdrive maximum transient duration ( ? s) benefits of an accurate reset threshold in other microprocessor supervisory circuits, tolerances in suppl y voltages lead to an overall increase in reset tolerance levels due to the deterioration of the microprocessor reset circuits power supply. the possibility of a malfunction during a power failure is greatly reduced because the adm803/adm809/adm810 series can operate effectively even when there are large degradations of the supply voltages. another advantage of the adm803/ adm809/adm810 series is its very accurate internal voltage reference circuit. these benefits combine to produce an excep- tionally reliable voltage monitor circuit. interfacing to microprocessors with multiple interrupts in a number of cases, it is necessary to interface many interrupts from different devices (for example, thermal, altitude, and velocity sensors) . t h e adm803/adm809/adm810 can easily be integrated into existing interrupt-handling circuits, as shown in figure 4, or can be used as a standalone device. interfacing to other devices output the adm803/adm809/adm810 series is designed to integrate with as many devices as possible and, therefore, has a standard output dependent on v cc . this enables the parts to be used in both 3 v and 5 v, or any nominal voltage within the minimum and maximum specifications for v cc . this design simplifies interfacing this device to other devices. ensuring a valid reset output down to v cc = 0 v when v cc falls below 0.8 v, the adm803/adm809 reset no longer sinks current. a high impedance cmos logic input connected to reset may, therefore, drift to undetermined logic levels. to eliminate this problem, a 100 k w resistor should be connected from reset to ground. v cc v cc gnd reset adm809 priority encoder 74ls147 4-line bcd t o micr opr ocessor v cc v cc adm809 other sensing reset devices gnd figure 4. interfacing to microprocessors with multiple interrupts figure 3. ensuring a valid reset output down to v cc = 0 v C8C rev. f
adm803/adm809/adm810
outline dimensions 3-lead small outline transistor package [sot-23-3] (rt-3) dimensions shown in millimeters 3-lead thin shrink small outline transistor package [sc70] (ks-3) dimensions shown in millimeters rev. f C9C
rev. f ?0 adm803/adm809/adm810 revision history location page 6/05?ata sheet changed from rev. e to rev. f. changes to ordering guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 updated outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2/05?ata sheet changed from rev. d to rev. e. changes to ordering guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2/05?ata sheet changed from rev. c to rev. d. changes to ordering guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 updated outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5/03?ata sheet changed from rev. b to rev. c. added adm803 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . universal changes to features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 changes to general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 changes to figure 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 changes to specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 changes to table i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 updated ordering guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1/03?ata sheet changed from rev. a to rev. b. changes to specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 changes to table i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 changes to ordering guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 changes to tpcs 1?, and tpc 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 updated outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 10/02?ata sheet changed from rev. 0 to rev. a. addition of sc70 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . universal change to general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 changes to specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 changes to absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 change to table i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 change to ordering guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 change to tpc 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 updated outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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c03736??/05(f) ?2

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