analog microelectronics, inc. 1 ame8500 / 8501 micropower m m m m m p reset family n n n n n features l small packages: sot-23, sot-89 l 11 voltage threshold options l tight voltage threshold tolerance --- 1.50% l 4 reset interval options l 4 output configuration options l wide temperature range -------- -40 o c to 85 o c l low temperature coefficient --- 100ppm/ o c (max) l low quiescent current < 3.0 m a l thermal shutdown option (ame8501) n n n n n general description the ame8500 family allows the user to customize the cpu reset function without any external components. the user has a large choice of reset voltage thresh- olds, reset time intervals, and output driver configura- tions, all of which are preset at the factory. each wafer is trimmed to the customer's specifications. these circuits monitor the power supply voltage of m p based systems. when the power supply voltage drops below the voltage threshold a reset is asserted immedi- ately (within an interval t d1 ). the reset remains asserted after the supply voltage rises above the voltage threshold for a time interval, t d2 . the reset output may be either active high (reset) or active low (resetb). the reset output may be configured as either push/pull or open drain. the state of the reset output is guaranteed to be correct for supply voltages greater than 1v. the ame8501 includes all the above functionality plus an overtemperature shutdown function. when the ambi- ent temperature exceeds 80 0 c a reset is asserted and remains asserted until the temperature falls below 60 0 c. space saving sot23 packages and micropower quies- cent current (<3.0 m a) make this family a natural for por- table battery powered equipment. n n n n n applications l portable electronics l power supplies l computer peripherals l data acquisition systems l applications using cpus l consumer electronics
analog microelectronics, inc. 2 ame8500 / 8501 micropower m m m m m p reset family n n n n n pin configuration ame8500aeet ame8501aeet 1: gnd 2: reset/resetb 3: v dd 3 1 2 ame8500beet ame8501beet 1: reset/resetb 2: gnd 3: v dd 3 1 2 ame8500aeft ame8501aeft 1: gnd 2: v dd 3: reset/resetb 3 2 1 ame8500beft ame8501beft 1: reset/resetb 2: v dd 3: gnd 3 2 1 3 1 2 ame8500ceet ame8501ceet 1: reset/resetb 2: v dd 3: gnd 3 2 1 1: v dd 2: gnd 3: reset/resetb ame8500ceft ame8501ceft
analog microelectronics, inc. 3 ame8500 / 8501 micropower m m m m m p reset family note: ame8500 without over-temperature thermal shutdown function. ame8501 with over-temperature thermal shutdown function. n ordering information ame8500xeet x x xx ( sot-23) ame8501xeet x x xx ( sot-23) ame8500xeft x x xx ( sot-89) ame8501xeft x x xx ( sot-89) vdd threshold voltage (v th ) 21: v th =2.1v 24: v th =2.4v 26: v th =2.63v 27: v th =2.7v 28: v th =2.8v 29: v th =2.93v 31: v th =3.08v 40: v th =4.0v 42: v th =4.20v 44: v th =4.38v 46: v th =4.63v note: please contact ame sales dept. f or other voltage options. reset time (td 2nom ) a: t d =1.5ms d: t d =30ms e: t d =150ms f: t d =210ms output driver option --for example-- * ame8500aeetaf27 means: a: pp output is resetb, push pull b: od * output driver chart explanation: reset time is 210ms c: pp pp = push pull output v dd threshold voltage is 2.7v d: od od = open drain output no temperature shutdow n polarity reset = active high resetb reset reset characteristic of reset or resetb pin po la r it y resetb
analog microelectronics, inc. 4 ame8500 / 8501 micropower m m m m m p reset family n n n n n absolute maximum ratings n n n n n recommended operating conditions n n n n n thermal information caution: stress above the listed absolute rating may cause permanent damage to the device ambient temperature range junction temperature supply voltage parameter -40 to +85 o c -40 to +125 o c storage temperature -65 to 150 o c rating 1.6 - 5 v maximum unit 7v b 20 ma 20 ma 100 v/ m s parameter supply voltage esd classification rate of rise, v dd output current, reset, resetb input current, v dd maximum unit 325 180 350 650 150 o c 300 o c parameter maximum lead temperature ( 10 sec) maximum junction temperature o c / w mw thermal resistance (sot-89) power dissipation (sot-23) power dissipation (sot-89) thermal resistance (sot-23)
analog microelectronics, inc. 5 ame8500 / 8501 micropower m m m m m p reset family n n n n electrical specifications t a = 25 o c unless otherwise noted parameter symbol min typ max units 15.5 15.5 3.0 m a 5.0 v thnom - 1.5% v thnom + 1.5% v thnom - 2.0% v thnom + 2.0% hysteresis range v hyst 20 mv reset threshold tempco 30 ppm resetb output voltage low v dd vth max resetb output voltage high v dd >vth max reset output voltage high v dd analog microelectronics, inc. 6 ame8500 / 8501 micropower m m m m m p reset family n n n n ame8500/01 pin description v dd gnd positive power supply. a reset is asserted after this voltage drops below a predetermined level. after v dd rises above that level the reset output remains asserted until the end of the reset timeout period. ground description name resetb/ reset this pin can be ordered as reset or resetb. reset is active high. resetb is active low. it is also available with an open drain or pushpull output.
analog microelectronics, inc. 7 ame8500 / 8501 micropower m m m m m p reset family n n n n n timing diagram n n n n n applications information these devices have a certain immunity to fast negative going transients. in the following pages the graph titled glitch rejection indicates the maximum allowable glitch amplitude and dura- tion to avoid triggering an unintended reset. as shown in the graph shorter transients can have larger amplitudes without triggering resets. supply transients 0 20 40 60 80 100 120 140 0.01 0.1 1 glitch rejection glitch duration ( m m m m s) glitch amplitude (v) v dd t d2 v th resetb v th t d1 t d2 t d1 reset 50% 50% 50% 50%
analog microelectronics, inc. 8 ame8500 / 8501 micropower m m m m m p reset family 0 0.4 0.8 1.2 1.6 2 012345 i dd vs. v dd i dd ( m m m m a) v dd (v) 85 o c -40 o c 0 o c 37 38 39 40 41 42 43 -40-20 0 20406080100 td1 delay vs. temperature td2 delay ( m m m m s) temperature ( o c) 0 0.1 0.2 0.3 0.4 0.5 -40 -20 0 20 40 60 80 100 threshold hysteresis vs. temperature hysteresis (% of v th ) temperature ( o c) 190 195 200 205 210 215 220 -45-5 255585115 temperature ( 0 c) reset time (ms) reset time vs. temperature ame8500aeetaf26 2.630 2.632 2.634 2.636 2.638 2.640 2.642 2.644 2.646 2.648 2.650 -45 -5 25 55 85 115 temperature ( 0 c) reset vth (v) reset vth vs. temperature ame8500aeetaf26 2.10 2.15 2.20 2.25 2.30 2.35 -45 -5 25 55 85 115 temperature ( 0 c) supply current @ 5v (ua) i dd vs. temperatrue ame8500aeetaf26
analog microelectronics, inc. 9 ame8500 / 8501 micropower m m m m m p reset family 0.220 0.225 0.230 0.235 0.240 0.245 0.250 0.255 0.260 0.265 -45 -5 25 55 85 115 temperature ( 0 c) reset vol @ 0.8ma (v) reset vol vs. temperature ame8500aeetaf26
analog microelectronics, inc. 10 ame8500 / 8501 micropower m m m m m p reset family n n n n n package dimension sot-23 sot-89 mi n ma x mi n ma x a 1.40 1.60 0.0551 0.0630 a 1 0.89 - 0.0350 - b 0.36 0.52 0.0142 0.0205 b 1 0.41 0.56 0.0161 0.0220 c 0.35 0.44 0.0138 0.0173 d 4.40 4.60 0.1732 0.1811 d 1 1.35 1.83 0.0531 0.0720 he - 4.25 - 0.1673 e 2.29 2.60 0.0902 0.1024 e 2.90 3.10 0.1142 0.1220 h 0.35 0.70 0.0138 0.0276 s1 1.40 1.60 0.0551 0.0630 symbols mi lli meter s i n ches min max min max a 1.00 1.40 0.0394 0.0551 a 1 0.00 0.15 0.0000 0.0059 a 2 0.70 1.25 0.0276 0.0492 b 0.35 0.50 0.0138 0.0197 c 0.09 0.25 0.0035 0.0098 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.60 3.00 0.1024 0.1181 l 0.35 0.55 0.0138 0.0197 q1 q1 q1 q1 0 o 9 o 0 o 9 o 1.90 bsc 0.0748 bsc symbols mi lli meters i nches
life support policy: these products of analog microelectronics, inc. are not authorized for use as critical components in life- support devices or systems, without the express written approval of the president of analog microelectronics, inc. analog microelectronics, inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ? analog microelectronics, inc. , december 2001 document: 2007-ds8500/8501-f corporate headquarters asia pacific headquarters analog microelectronics, inc. ame, inc. 3100 de la cruz blvd. suite 201 2f, no. 187 kang-chien road, nei-hu district santa clara, ca. 95054-2046 taipei 114, taiwan, r.o.c. tel : (408) 988-2388 tel : 886 2 2627-8687 fax: (408) 988-2489 fax : 886 2 2659-2989 www.analogmicro.com e-mail: info@analogmicro.com
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