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ame, inc. 1 rev. a.01 ame8570 m processor supervisory n functional block diagram the ame8570 family allows the user to customize the cpu reset function without any external components. the user has serveral choice of reset voltage thresholds, reset time intervals, and output driver configurations, all of which are preset at the factory. 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 only when supply voltage is greater than 1v. the ame8570 also provide a reset manually by pulling the mrb input to ground. space saving sc-70 package and micropower quies- cent current ( < 5.0 m a ) make this family a natural for portable battery powered equipment. l portable electronics l power supplies l computer peripherals l data acquisition systems l applications using cpus l consumer electronics n general description n features n applications l small packages : sc-70, sot-23 l tight voltage threshold tolerance : 1.50% l wide temperature range : -40 o c to 85 o c l low quiescent current < 5.0 m a l manual reset input option l all ame's lead free products meet rohs standards delay in gnd r1 r2 i1 v ref n1 reset/ resetb mrb ame8570 open-drain reset/ resetb with mrb delay in gnd r1 r2 i1 v ref p1 n1 reset/ resetb ame8570 push-pull reset/ resetb reset/ resetb delay in gnd r1 r2 i1 v ref n1 ame8570 open-drain reset/resetb delay in gnd r1 r2 i1 v ref p1 n1 reset/ resetb mrb ame8570 push-pull reset/ resetb with mrb
ame, inc. m processor supervisory ame8570 2 rev. a.01 n typical operating circuit ame8570aeit 1. gnd 2. reset/resetb 3. in sc-70-3 top view ame8570aeet 1. gnd 2. reset/resetb 3. in sot-23 top view 1 2 3 ame8570 sc-70-4 top view ame8570aeiu 1. gnd 2. reset/resetb 3. mrb 4. in 1 2 3 ame8570 * die attach: non-conductive epoxy * die attach: non-conductive epoxy n pin configuration note: * external pull-up resistor is required if open-drain output is used. 10k w is recommended. * die attach: non-conductive epoxy 1 2 3 ame8570 4 m p v in gnd reset input v in gnd reset / resetb r* pull-up mrb push button switch
ame, inc. 3 rev. a.01 ame8570 m processor supervisory pin number pin name pin description 1 gnd ground 2 reset/resetb 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 push-pull output. 3 in positive power supply. a reset is asserted after this voltage drops below a predetermined level. after v in rises above that level the reset output remains asserted until the end of the reset timeout period. n pin description ame8570aeit / ame8570aeet ame8570aeiu pin number pin name pin description 1 gnd ground 2 reset/resetb 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 push-pull output. 3 mrb manual reset. active low. pulling this pin low forces a reset. after a low to high transition reset, remains asserted for exactly one reset timeout period. this pin is internally pulled high. the pin is floating or tied to v in , if it is unused. 4 in positive power supply. a reset is asserted after this voltage drops below a predetermined level. after v in rises above that level the reset output remains asserted until the end of the reset timeout period.
ame, inc. m processor supervisory ame8570 4 rev. a.01 n ordering information operating ambient temperature range output driver option number of pins package type special feature reset time (t d2nom ) v in threshold voltage (v th ) ame8570 x x x x x x xx x pin configuration v i n t h r es ho ld v o l t a g e ( v t h ) a 1 . g nd e : - 4 0 o c t o 8 5 o c e: s o t - 2 x t : 3 a : r ese t b / p p f : 210 m s 23 : v t h = 2 . 32 v z : lead f r e e ( s o t - 23 ) 2 . r ese t / i : s c - 7 0 u: 4 b : r ese t b / o d 26 : v t h = 2 . 63 v ( s c - 70 - 3 ) r ese t b c: r ese t / p p 29 : v t h = 2 . 93 v 3 . in d: r ese t / o d 31 : v t h = 3 . 08 v 46 : v t h = 4 . 63 v a 1 . g nd ( s c - 70 - 4 ) 2 . r ese t / r ese t b 3 . m rb 4 . in ( r ese t b = a c t i v e lo w ) ( pp = p u s h - pu ll ou t ) ( o d =o pen - d r a i n o u t pu t o p t i on s r ese t t i m e ( t d 2 n o m ) s p ec i a l f ea t u r e ( r ese t = a c t i v e h i gh ) p in c on f i gu r a t i o n o p e r a t i ng a m b i e n t t e m p e r a t u r e r a ng e p acka g e t y p e n u m b e r o f p i n s
ame, inc. 5 rev. a.01 ame8570 m processor supervisory n ordering information note: ww & w represents the date code and pls refer to the date code rule on package dimension. * a line on top of the first letter represents lead free plating such as bjoww. pls consult ame sales office or authorized rep./distributor for the availability of output voltage or package type. part number marking* output voltage package operating ambient temperature range ame8570aeetaf23z bjoww 2.32v sot-23 -40 o c to 85 o c ame8570aeitaf23z bjpw 2.32v sc-70-3 -40 o c to 85 o c ame8570aeiuaf23z bjqw 2.32v sc-70-4 -40 o c to 85 o c ame8570aeetaf26z bjrww 2.63v sot-23 -40 o c to 85 o c ame8570aeitaf26z bjsw 2.63v sc-70-3 -40 o c to 85 o c ame8570aeiuaf26z bjtw 2.63v sc-70-4 -40 o c to 85 o c ame8570aeetaf29z bjuww 2.93v sot-23 -40 o c to 85 o c ame8570aeitaf29z bjvw 2.93v sc-70-3 -40 o c to 85 o c ame8570aeiuaf29z bjww 2.93v sc-70-4 -40 o c to 85 o c ame8570aeetcf29z bjxww 2.93v sot-23 -40 o c to 85 o c ame8570aeitcf29z bjyw 2.93v sc-70-3 -40 o c to 85 o c ame8570aeiucf29z bjzw 2.93v sc-70-4 -40 o c to 85 o c ame8570aeetaf31z bkaww 3.08v sot-23 -40 o c to 85 o c ame8570aeitaf31z bkbw 3.08v sc-70-3 -40 o c to 85 o c ame8570aeiuaf31z bkcw 3.08v sc-70-4 -40 o c to 85 o c AME8570AEETBF31Z bkdww 3.08v sot-23 -40 o c to 85 o c ame8570aeitbf31z bkew 3.08v sc-70-3 -40 o c to 85 o c ame8570aeiubf31z bkfw 3.08v sc-70-4 -40 o c to 85 o c ame8570aeetaf46z bkgww 4.63v sot-23 -40 o c to 85 o c ame8570aeitaf46z bkhw 4.63v sc-70-3 -40 o c to 85 o c ame8570aeiuaf46z bkiw 4.63v sc-70-4 -40 o c to 85 o c ame8570aeetcf46z bkjww 4.63v sot-23 -40 o c to 85 o c ame8570aeitcf46z bkkw 4.63v sc-70-3 -40 o c to 85 o c ame8570aeiucf46z bklw 4.63v sc-70-4 -40 o c to 85 o c
ame, inc. m processor supervisory ame8570 6 rev. a.01 n absolute maximum ratings n recommended operating conditions n thermal information note: caution: stress above the listed in absolute maximum ratings may cause permanent damage to the device. * hbm b: 2000v ~ 3999v parameter maximum unit supply voltage 6 v input current, v in output current, reset, resetb esd classification b* 20 ma parameter symbol rating unit ambient temperature range t a - 40 to 85 junction temperature range t j - 40 to 125 storage temperature range t stg - 65 to 150 o c * measure q jc on center of molding compound if ic has no tab. ** mil-std-202g 210f parameter package die attach symbol maximum unit thermal resistance* (junction to case) sot-23 q jc 140 thermal resistance (junction to ambient) sot-23 q ja 280 internal power dissipation sot-23 p d 400 mw 350 o c solder iron (10 sec) ** non-conductive epoxy o c / w
ame, inc. 7 rev. a.01 ame8570 m processor supervisory parameter symbol min typ max units v in range v range 1 5.5 v supply current i in 5 10 m a v th -1.5% v th +1.5% v th -2% v th +2% hysteresis range v hyst 10 30 60 mv i source = 0.5ma, v in > 1.8v i source = 0.15ma, 1.8v >= v in > 1.0v i source = 0.5ma, v in > 1.8v i source = 0.15ma, 1.8v >= v in > 1.0v resetb output voltage low v in < v th (min) reset output voltage low v in > v th (max) v in to reset delay t d1 40 m s reset timeout period t d2 t a = -40 o c to 85 o c version f 140 210 600 ms mrb il 0.7 mrb ih 0.8v in mrb pulse width 1 m s mrb noise immunity (pulse width with no reset) 100 ns mrb to reset delay 500 ns mrb pull up resistance 80 120 k w v v v release - v th v in = v th x 1.2 t a = -40 o c to 85 o c v th reset threshold v resetb output voltage high reset output voltage high v ol i sink = 1.2ma, t j = -40 o c to 85 o c v in = v th -100mv; t a = -40 o c to 85 o c v oh mrb input threshold test condition v in = v th x 1.10, t a = -40 o c to 85 o c mrb unconnected t a = -40 o c to 85 o c v in > v th (max) 0.8v in v in < v th (min) v 0.5 n electrical specifications t a = 25 o c unless otherwise noted.
ame, inc. m processor supervisory ame8570 8 rev. a.01 n timing diagram n applications information supply transients 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 duration to avoid triggering an unintended reset. as shown in the graph shorter transients can have larger amplitudes without triggering resets. glitch rejection reset time vs. temperature g l i t c h d u r a t i o n ( m s ) glitch amplitude (v) 0 20 40 60 80 100 120 140 0.01 0.1 1 v in resetb reset t d2 v release v th t d1 t d2 t d1 50% 50% 50% 50% 150 200 250 300 350 400 450 500 550 600 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 temperature ( o c) r e s e t t i m e ( m s )
ame, inc. 9 rev. a.01 ame8570 m processor supervisory n detailed description the ame8570 are designed to interface with the reset input of a microprocessor and to prevent code-execution errors due to power up, power down, and other power supply errors. reset output each output pin in the family can be configured to be either push-pull or open-drain. in addition each output may be either active high or active low. active high reset out- puts are denoted as reset. active low reset outputs are denoted as resetb. the selection guide on this data sheet shows all possible combinations of output driver configuration. a reset will be asserted if any of two things happen: 1) v in drops below the threshold (v th ) 2) the mrb pin is pulled low. the reset will remain asserted for the prescribed reset interval after: 1) v in rises above the threshold (v th ) 2) mrb goes high manual reset input the ame8570 feature a manual reset feature (mrb). a logic low on the mrb pin asserts a reset. the reset remains asserted as long as the mrb pin remains low. after the mrb pin transitions to a high state the reset remains asserted for the prescribed reset interval (t d2 ). the mrb pin is internally pulled up to v in by a 100k resistor. it is internally debounced to reject switching transients. the mrb pin is esd protected by diodes connected to v in and gnd. so the mrb pin should never be driven higher than v in or lower than gnd. glitch rejection the ame8570 family will reject negative going transients on the v in line to some extent. the smaller the duration of the transient the larger its amplitude may be without triggering a reset. the "glitch rejection" chart in the graphs section of this datasheet shows the relation be- tween glitch amplitude and allowable glitch duration to avoid unintended resets. accurate output state at low v in with v in voltage on the order of the mos transistor threshold (<1.0v) the outputs of the ame8570 may be- come undefined. for parts with active low output (resetb) a resistor placed between resetb and gnd on the order of 100k will ensure that the resetb output stays low when v in is lower than the threshold voltage of the part. in a like manner a resistor on the order of 100k when placed between reset and v in will ensure parts with active high output (reset) will remain high when v in is lower than the threshold voltage of the part.
ame, inc. m processor supervisory ame8570 10 rev. a.01 i in vs. v in threshold hysteresis vs. temperature i in vs. temperature reset v th vs. temperature reset vol vs. temperature 1.0 1.5 2.0 2.5 3.0 3.5 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 temperature ( o c) s u p p l y c u r r e n t @ 5 v ( m a ) ame8570aeetaf26 temperature ( o c) 2.60 2.61 2.62 2.63 2.64 2.65 2.66 2.67 2.68 2.69 2.70 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 r e s e t v t h ( v ) ame8570aeetaf26 v in (v) 0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 i i n ( m a ) 0 o c -40 o c 85 o c temperature ( o c) 0.000 0.005 0.010 0.015 0.020 0.025 0.030 -40 -20 0 20 40 60 80 h y s t e r e s i s ( v ) temperature ( o c) 0.010 0.012 0.014 0.016 0.018 0.020 0.022 0.024 0.026 0.028 0.030 0.032 0.034 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 r e s e t v o l @ 0 . 8 m a ( v ) ame8570aeetaf26
ame, inc. 11 rev. a.01 ame8570 m processor supervisory n date code rule year a a a w w xxx0 a a a w w xxx1 a a a w w xxx2 a a a w w xxx3 a a a w w xxx4 a a a w w xxx5 a a a w w xxx6 a a a w w xxx7 a a a w w xxx8 a a a w w xxx9 marking date code year a a a xxx0 a a a xxx1 a a a xxx2 a a a xxx3 a a a xxx4 a a a xxx5 a a a xxx6 a a a xxx7 a a a xxx8 a a a xxx9 w w w w w w w w marking date code w w for sc-70 package only a: 01&02 k: 21&22 u: 41&42 b: 03&04 l: 23&24 v: 43&44 c: 05&06 m: 25&26 w: 45&46 d: 07&08 n: 27&28 x: 47&48 e: 09&10 o: 29&30 y: 49&50 f: 11&12 p: 31&32 z: 51&52 g: 13&14 q: 33&34 h: 15&16 r: 35&36 i: 17&18 s: 37&38 j: 19&20 t: 39&40 w: work week code for sot-23 package only
ame, inc. m processor supervisory ame8570 12 rev. a.01 package carrier width (w) pitch (p) part per full reel reel size sc-70-3 8.00.1 mm 4.00.1 mm 3000pcs 1801 mm sot-23 n tape and reel dimension package carrier width (w) pitch (p) part per full reel reel size sot-23 8.00.1 mm 4.00.1 mm 3000pcs 1801 mm carrier tape, number of components per reel and reel size pin 1 w p ame ame sc-70-3 carrier tape, number of components per reel and reel size pin 1 w p ame ame
ame, inc. 13 rev. a.01 ame8570 m processor supervisory package carrier width (w) pitch (p) part per full reel reel size sc-70-4 8.00.1 mm 4.00.1 mm 3000pcs 1801 mm n tape and reel dimension carrier tape, number of components per reel and reel size sc-70-4 w p ame ame pin 1
ame, inc. m processor supervisory ame8570 14 rev. a.01 min max min max a 1.00 1.40 0.0394 0.0551 a 1 0.00 0.15 0.0000 0.0059 b 0.35 0.50 0.0138 0.0197 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.40 3.00 0.09449 0.11811 l q 1 0 o 10 o 0 o 10 o 1.90 bsc 0.0748 bsc 0.35bsc 0.0138bsc symbols millimeters inches n package dimension sot-23 b c1 d h e e l a a 1 top view side view front view
ame, inc. 15 rev. a.01 ame8570 m processor supervisory n package dimension sc-70-3 top view front view detail a side view section a-a d e1 e1/2 e1 e b b b a c c 0.15(0.006) c .10(0.004) m e/2 e see detail a a a .10(0.004) base metal c a2 a1 a 0.15(0.006) gage plane l c c1 h .15(.0059) b1 (b) c1 c c seating plane d min max min max a 0.80 1.10 0.031 0.043 a1 0.00 0.10 0.000 0.004 a2 0.80 1.00 0.031 0.039 b 0.15 0.40 0.006 0.016 b1 0.15 0.25 0.006 0.010 c 0.08 0.25 0.003 0.010 c1 0.08 0.20 0.003 0.008 d 1.90 2.20 0.075 0.087 e 2.00 2.45 0.079 0.096 e1 1.15 1.35 0.045 0.053 e e1 1.20 1.40 0.047 0.055 l 0.26 0.46 0.010 0.018 q 1 0 o 8 o 0 o 8 o q 2 4 o 10 o 4 o 10 o 0.65bsc 0.0255bsc symbols millimeters inches
ame, inc. m processor supervisory ame8570 16 rev. a.01 n package dimension sc-70-4 top view e1 d e e1 b1 b d side view q l l1 e c 0.20 front view a1 a2 a min max min max a 0.900 1.100 0.035 0.043 a1 0.000 0.100 0.000 0.004 a2 0.900 1.000 0.035 0.039 b 0.250 0.400 0.010 0.016 b1 0.350 0.500 0.014 0.020 c 0.080 0.150 0.003 0.006 d d 2.000 2.200 0.079 0.087 e 1.150 1.350 0.045 0.053 e1 2.150 2.450 0.085 0.096 e e1 1.200 1.400 0.047 0.055 l l1 0.260 0.460 0.010 0.018 q 0 o 8 o 0 o 8 o 0.050 typ 0.002 typ 0.525 ref 0.021 ref 0.650 typ 0.026typ symbols millimeters inches
life support policy: these products of ame, inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of ame, inc. ame, 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. ? ame, inc. , july 2007 document: 1221-ds8570-a.01 corporate headquarter u.s.a (subsidiary) ame, inc. analog microelectronics, inc. 2f, 302 rui-guang road, nei-hu district 3100 de la cruz blvd., suite 201 taipei 114, taiwan. santa clara, ca. 95054-2046 tel: 886 2 2627-8687 tel : (408) 988-2388 fax: 886 2 2659-2989 fax: (408) 988-2489 www.ame.com.tw e-mail: sales@ame.com.tw

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