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ame, inc. 1 ame8550 voltage detector n functional block diagram l highly accurate: + 2% l low power consumption: typ 0.8 m a (v dd =1.5v) l detect voltage range: 1.6v to 6.0v in 0.1v increments l operating voltage range: 0.9v to 6.5v l detect voltage temperature characteristics: typ 100ppm/ o c l output configuration: n-channel open drain or cmos l ultra small package : sot-23 (150mw) sot-25 (150mw) sot-89 (500mw) sc-70 (100mw) l add an external capacitor to perform an m p reset. the ame8550 series are highly precise, low power con- sumption voltage detectors, manufactured using cmos and fuse trimming technologies. detect voltage is ex- tremely accurate with minimal temperature drift. both cmos and n channel open drain output configu- rations are available. l microprocessor reset circuitry l memory battery back-up circuits l power-on reset circuits l power failure detection l system battery life and charge voltage monitors n general description n features n applications (1) cmos output without delay (2) nch open drain output without delay (3) cmos output with delay (4) nch open drain output with delay v dd v out v ss bg vref v dd v out v ss bg vref v dd v out v ss cd v dd i bg vref v th =v ref i v out v ss cd v dd v dd bg vref v th =v ref
ame, inc. 2 voltage detector ame8550 n pin configuration ame8550aeetxxxx 1. v out 2. v ss 3. v dd ame8550aeevxxxx 1. v out 2. v dd 3. v ss 4. cd 5. nc sot-23 top view ame8550aeftxxxx 1. v out 2. v dd 3. v ss sot-89 top view sot-25 top view ame8550beevxxxx 1. v out 2. v dd 3. v ss 4. nc 5. cd 12 3 ame8550 n pin description 13 2 5 4 ame8550 sot-25 top view ame8550ceevxxxx 1. v out 2. v dd 3. v ss 4. nc 5. nc sot-25 top view 13 2 ame8550 13 2 5 4 ame8550 13 2 5 4 ame8550 pin name pin description v in supply voltage input v ss ground v out output nc no connection cd connect an external capacitor when delay function is needed 12 3 ame8550 sc70-3 top view ame8550aeitxxxx 1. v ss 2. v out 3. v dd
ame, inc. 3 ame8550 voltage detector n ordering information please consult ame sales office or authorized rep./distributor for other voltage accuracy and package type availabil- ity. output options a: cmos output without delay b: open-drain output without delay c: cmos output with delay d: open-drain output with delay package type f: sot-89 e: sot-23 e: sot-25 i : sc-70 operating temperature e: -40 o c to 85 o c pin out configuration number of pins t: 3 v:5 detect voltage 190: v=1.9v 250: v=2.5v 360: v=3.6v 200: v=2.0v 260: v=2.6v 370: v=3.7v 220: v=2.2v 270: v=2.7v 420: v=4.2v 230: v=2.3v 280: v=2.8v 440: v=4.4v 240: v=2.4v 290: v=2.9v 460: v=4.6v special feature l : lead free y : low profile z : lead free & low profile ame8550 x x x x x xxx x
ame, inc. 4 voltage detector ame8550 n ordering information note: w represents date code ( a thru z ) : 2 work weeks per character. please contact ame for details part number marking output voltage package operating temp. range ame8550aeevc190 axoww 1.9v sot-25 -40 o c to +85 o c ame8550beevc190 axpww 1.9v sot-25 -40 o c to +85 o c ame8550aeetb210 axqww 2.1v sot-23 -40 o c to +85 o c ame8550aeftb210 a8550a b210ww 2.1v sot-89 -40 o c to +85 o c ame8550ceevb210 axrww 2.1v sot-25 -40 o c to +85 o c ame8550aeeta220 awhww 2.2v sot-23 -40 o c to +85 o c ame8550aefta220 a8550a a220ww 2.2v sot-89 -40 o c to +85 o c ame8550aeita220 axkw 2.2v sc70-3 -40 o c to +85 o c ame8550aeetb220 awuww 2.2v sot-23 -40 o c to +85 o c ame8550aeftb220 a8550a b220ww 2.2v sot-89 -40 o c to +85 o c ame8550ceevb220 axsww 2.2v sot-25 -40 o c to +85 o c ame8550aeevd230 aytww 2.3v sot-25 -40 o c to +85 o c ame8550beevd230 ayuww 2.3v sot-25 -40 o c to +85 o c ame8550aeeta240 axtww 2.4v sot-23 -40 o c to +85 o c ame8550aefta240 a8550a a240ww 2.4v sot-89 -40 o c to +85 o c ame8550ceeva240 axuww 2.4v sot-25 -40 o c to +85 o c
ame, inc. 5 ame8550 voltage detector part number marking output voltage package operating temp. range ame8550aeetb240 axvww 2.4v sot-23 -40 o c to +85 o c ame8550aeftb240 a8550a b240ww 2.4v sot-89 -40 o c to +85 o c ame8550c eevb240 axwww 2.4v sot-25 -40 o c to +85 o c ame8550a eevd240 axxww 2.4v sot-25 -40 o c to +85 o c ame8550b eevd240 axyww 2.4v sot-25 -40 o c to +85 o c ame8550aeetb250 axzww 2.5v sot-23 -40 o c to +85 o c ame8550aeftb250 a8550a b250ww 2.5v sot-89 -40 o c to +85 o c ame8550c eevb250 ayaww 2.5v sot-25 -40 o c to +85 o c ame8550a eevd260 ayvww 2.6v sot-25 -40 o c to +85 o c ame8550b eevd260 aywww 2.6v sot-25 -40 o c to +85 o c ame8550aeeta270 awiww 2.7v sot-23 -40 o c to +85 o c ame8550aefta270 a8550a a270ww 2.7v sot-89 -40 o c to +85 o c ame8550aeita270 axnw 2.7v sc70-3 -40 o c to +85 o c ame8550aeetb270 awvww 2.7v sot-23 -40 o c to +85 o c ame8550aeftb270 a8550a b270ww 2.7v sot-89 -40 o c to +85 o c ame8550c eevb270 aysww 2.7v sot-25 -40 o c to +85 o c n ordering information
ame, inc. 6 voltage detector ame8550 n ordering information part number marking output voltage package operating temp. range ame8550aeevd270 ayxww 2.7v sot-25 -40 o c to +85 o c ame8550beevd270 ayyww 2.7v sot-25 -40 o c to +85 o c ame8550aeetb280 aybww 2.8v sot-23 -40 o c to +85 o c ame8550aeftb280 a8550a b280ww 2.8v sot-89 -40 o c to +85 o c ame8550ceevb280 aycww 2.8v sot-25 -40 o c to +85 o c ame8550aeevc290 aydww 2.9v sot-25 -40 o c to +85 o c ame8550beevc290 ayeww 2.9v sot-25 -40 o c to +85 o c ame8550aeeta300 ayfww 3.0v sot-23 -40 o c to +85 o c ame8550aefta300 a8550a a300ww 3.0v sot-89 -40 o c to +85 o c ame8550ceeva300 aygww 3.0v sot-25 -40 o c to +85 o c ame8550aeetb340 ayhww 3.4v sot-23 -40 o c to +85 o c ame8550aeftb340 a8550a b340ww 3.4v sot-23 -40 o c to +85 o c ame8550ceevb340 ayiww 3.4v sot-25 -40 o c to +85 o c ame8550aeevd360 ayjww 3.6v sot-25 -40 o c to +85 o c AME8550BEEVD360 aykww 3.6v sot-25 -40 o c to +85 o c ame8550aeetb440 aylww 4.4v sot-23 -40 o c to +85 o c
ame, inc. 7 ame8550 voltage detector n ordering information part number marking output voltage package operating temp. range ame8550aeftb440 a8550a b440ww 4.4v sot-89 -40 o c to +85 o c ame8550ceevb440 aymww 4.4v sot-25 -40 o c to +85 o c ame8550aeevc460 aynww 4.6v sot-25 -40 o c to +85 o c ame8550beevc460 ayoww 4.6v sot-25 -40 o c to +85 o c
ame, inc. 8 voltage detector ame8550 n absolute maximum ratings caution: stress above the listed absolute rating may cause permanent damage to the device symbol maximum unit v dd 7v i out 50 ma cmos vss -0.3 to v dd +0.3 nch open drain vss -0.3 to 7 sot-23 150 sot-25 150 sot-89 500 sc-70 100 topr -40 to +85 t stg - 40 to +125 v parameter output voltage input voltage v out output current o c operating ambient temperature range storage temperature range power dissipation mw
ame, inc. 9 ame8550 voltage detector parameter symbol min typ max units detect voltage v df v df x0.98 v df v df x1.02 v hysteresis range v hys / v df 28% 0.8 2.3 0.9 2.7 1.0 3.0 1.1 3.2 1.2 3.6 operating voltage v dd 0.9 6.5 v 1.0 2.2 3.0 7.7 5.0 10.1 6.0 11.5 7.0 13.0 temperature characteristics d v df d topr.v df 100 ppm/ o c propagation time (v dr --> v out inversion) tdly 0.2 ms -2.0 ma m a -40 o c<= topr<= 85 o c v dd =2.0v v dd =3.0v v dd =4.0v v dd =5.0v pch v ds =2.1v v dd =7v (with cmos output) -10.0 test condition output current i out v dd =5.0v v dd =1.0v v dd =3.0v supply current v dd =1.5v v dd =2.0v nch v ds =0.5v v dd =4.0v i ss v df (t)=1.6v to 6.0v n electrical specifications ta = 25 o c, v df (t)=1.6 to 6.0v + 2% note: v df (t) : established detect voltage value release voltage : v dr = v df + v hys
ame, inc. 10 voltage detector ame8550 1. when input voltage (v dd ) rises above detect voltage (v df ), output voltage (v out ) will be equal to v dd . ( a condition of high impedance exists with nch open drain output configurations. ) 2. when input voltage (v dd ) falls below detect voltage (v df ), output voltage (v out ) will be equal to the ground voltage (v ss ) level. 3. when input voltage (v dd ) falls to a level below that of the minimum operating voltage (v min ), output will become unstable. in this condition, v dd will equal the pulled-up output ( should output be pulled-up.) 4. when input voltage (v dd ) rises above the ground volt- age (v ss ) level, output will be unstable at levels below the minimum operating voltage (v min ). between the v min and detect release voltage (v dr ) levels, theground voltage (v ss ) level will be maintained. 5. when input voltage (v dd ) rises above detect release voltage (v dr ), output voltage (v out ) will be equal to v dd after t d delay time. q = v x c = i x t d t= v=v ref for example, t d = ( a condition of high impedance exists with nch open drain output configurations. ) 6. the difference between v dr and v df represents the hysteresis range. n functional description (cmos output without delay) 1. when input voltage (v dd ) rises above detect voltage (v df ), output voltage (v out ) will be equal to v dd . ( a condition of high impedance exists with nch open drain output configurations. ) 2. when input voltage (v dd ) falls below detect voltage (v df ), output voltage (v out ) will be equal to the ground voltage (v ss ) level. 3. when input voltage (v dd ) falls to a level below that of the minimum operating voltage (v min ), output will become unstable. in this condition, v dd will equal the pulled-up output ( should output be pulled-up.) 4. when input voltage (v dd ) rises above the ground volt- age (v ss ) level, output will be unstable at levels below the minimum operating voltage (v min ). between the v min and detect release voltage (v dr ) levels, theground voltage (v ss ) level will be maintained. 5. when input voltage (v dd ) rises above detect release voltage (v dr ), output voltage (v out ) will be equal to v dd . ( a condition of high impedance exists with nch open drain output configurations. ) 6. the difference between v dr and v df represents the hysteresis range. n timing chart n functional description (cmos output with delay) n timing chart detect voltage (v df ) min. operating voltage (v min ) output voltage (v out ) ground voltage (v ss ) ground voltage (v ss ) detect release voltage (v dr ) input voltage (v dd ) 12 3 4 5 6 t d detect voltage (v df ) min. operating voltage (v min ) output voltage (v out ) ground voltage (v ss ) ground voltage (v ss ) detect release voltage (v dr ) input voltage (v dd ) 12 3 4 5 6 vxc i v ref * 1nf 75na
ame, inc. 11 ame8550 voltage detector n notes on use 1. when a resistor is connected between the v dd pin and the input with cmos output configurations, oscillation may occur as a result of voltage drops at r in if load cur- rent (i out ) exists. ( refer to 5 - (1) below ) 2. when a resistor is connected between the v dd pin and the input with cmos output configurations, irrespective of nch output configurations, oscillation may occur as a result of through current at the time of voltage release even if load current (i out ) does not exist.( refer to 5 - (1)(2) below ) 3. with a resistor connected between the v dd pin and the input, detect and release voltage will rise as a result of the ics supply current flowing through the v dd pin. 4. in order to stabilise the ics operations, please en- sure that v dd pins input frequencys rise and fall times are more than several m sec / v. 5. oscillation (1) output current oscillation with the cmos output configuration when the voltage applied at in rises, release op- erations commence and the detectors output volt- age increases. load current (i out ) will flow at r l . because a voltage drop ( r in x i out ) is produced at the r in resistor, located between the input (in) and the v dd pin, the load current will flow via the ics v dd pin. the voltage drop will also lead to a fall in the voltage level at the v dd pin. when the v dd pin voltage level falls below the detect voltage level, detect operations will commence. following detect operations, load current flow will cease and since voltage drop at r in will disappear, the voltage level at the v dd pin will rise and release operations will begin over again. oscillation may occur with this release - de- tect - release repetition. further, this condition will also appear via means of a similar mechanism during detect operations. (2) oscillation as a result of through current since the ame8550 series are cmos ic s , through current will flow when the ics internal cir- cuit switching operates(during release and detect operations ).consequently, oscillation is liable to occur as a result of drops in voltage at the through currents resistor (r in ) during release voltage op- erations. ( refer to diagram 2 ) since hysteresis exists during detect operations, oscillation is unlikely to occur. diagram1 diagram2 v ss v out v dd i out r in r in xi out voltage drop ame8550 input v ss v out v dd r in r in xi ss * voltage drop ame8550 iss* (includes through current) input
ame, inc. 12 voltage detector ame8550 ame8550-1.9v ame8550-2.7v 0 20 40 60 80 100 120 140 160 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 vds (v) nmos sinking current (ua) vdd=0.7v vdd=0.8v 0 50 100 150 200 250 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 vds (v) nmos sinking current (ua) 0 2 4 6 8 10 12 14 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 vds (v) nmos sinking current (ma) ame8550-1.9v ame8550aeeta270 vin=1.0v vin=1.5v vin=2.0v vin=2.5v 0 5 10 15 20 25 30 35 40 0.00 0.50 1.00 1.50 2.00 2.50 3.00 vds (v) nmos sinking current (ma) ame8550-4.6v vdd=0.7v vdd=0.8v 0 20 40 60 80 100 120 140 160 180 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 vds (v) nmos sinking current (ua) ame8550-4.6v vin=1.5v vin=2.0v vin=2.5v vin=3.0v vin=3.5v vin=4.0v 0 5 10 15 20 25 30 35 40 45 50 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 vds (v) nmos sinking current (ma)
ame, inc. 13 ame8550 voltage detector ame8550aeeta270 vds=0.5v vds=1.0v vds=1.5v vds=2.1v 0 2 4 6 8 10 12 14 16 0 . 0 0. 5 1. 0 1.5 2.0 2. 5 3.0 3 .5 4. 0 4. 5 5 .0 5.5 6.0 input voltage (v) pmos sourcing current (ma) ame8550-4.6v ame8550-4.6v 0 1 2 3 4 5 6 7 8 9 10 012345 input voltage (v) nmos sinking current (ma) vds=0.5v vds=1.0v vds=1.5v vds=2.1v 0 2 4 6 8 10 12 14 16 0. 0 0.4 0. 8 1.2 1.6 2. 0 2 . 4 2 .8 3.2 3. 6 4. 0 4. 4 4. 8 5 . 2 5. 6 6.0 input voltage (v) pmos sourcing current (ma) vds=0.5v vds=1.0v vds=1.5v vds=2.1v 0 2 4 6 8 10 12 14 16 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 input voltage (v) pmos sourcing current (ma) ame8550-2.7v 0 1 2 3 4 5 6 7 8 9 0.0 0.5 1.0 1.5 2.0 2.5 3.0 input voltage (v) nmos sinking current (ma) 0 1 2 3 4 5 6 7 8 9 0.0 0.5 1.0 1.5 2.0 input voltage (v) nmos sinking current (ma) ame8550-1.9v ame8550-1.9v
ame, inc. 14 voltage detector ame8550 supply current vs. input voltage (2.7v) output voltage vs. input voltage (2.2v) input voltage (v) supply current (ua) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 012345 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 0.5 1 1.5 2 2.5 3 input voltage (v) output voltage (v) v in up v in down output voltage vs. input voltage (2.7v) input voltage (v) output voltage (v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 0.5 1 1.5 2 2.5 3 v in up v in down
ame, inc. 15 ame8550 voltage detector n package dimension sot-23 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 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 2.40 3.00 0.09449 0.11811 l 1 0 o 10 o 0 o 10 o symbols millimeters inches 1.90 bsc 0.0748 bsc 0.35bsc 0.0138bsc b c 1 c d h e e l a a1 top view side view front view sot-25 min max min max a a 1 0.00 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.60 3.00 0.10236 0.11811 l 1 0 o 10 o 0 o 10 o s 1 1.90 bsc 0.07480 bsc symbols millimeters inches 1.20ref 0.0472ref 0.37bsc 0.0146bsc 0.95bsc 0.0374bsc l top view side view front view c 1 d s1 e e h a1 b a
ame, inc. 16 voltage detector ame8550 n package dimension sot-89 min max min max a 1.39 1.60 0.05472 0.06299 a 1 c 0.35 0.44 0.01378 0.01732 d 4.39 4.60 0.17283 0.1811 d 1 1.35 1.83 0.05315 0.07205 e 2.28 3.60 0.08976 0.14173 e h s1 0.8ref 0.0315ref symbols millimeters inches 3.00ref 0.70ref 1.50ref 0.1181ref 0.0276ref 0.0590ref a h a1 top view side view front view d d1 e e c polish polish matte finish s1
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. , december 2003 document: 2051-ds8550-c corporate headquarter u.s.a (subsidiary) ame, inc. analog microelectronics, inc. 2f, 189 kang-chien road, nei-hu district 3100 de la cruz blvd., suite 201 taipei 114, taiwan, r.o.c. 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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