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r3114x series low voltage detector no.ea-160-071109 1 outline the r3114 series are cmos-based voltage detector ic with high detector threshold accuracy and ultra-low supply current, which can be operated at an ex tremely low voltage and is used for system reset as an example. each of these ics consists of a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver and a hysteres is circuit. the detector threshold is fixed with high accuracy internally and does not require any adjustment. two output types, nch open drain type and cmos type are available. the r3114 series are operable at a lower voltage than that of the r3111x seri es, and can be driven by a single battery. three types of packages, sot-23-5, sc- 82ab, and dfn(plp)1010-4 are available. features ultra-low supply curr ent typ. 0. 35a(at v dd =2.5v, topt=25c) wide range of operating voltage 0.45v to 6. 0v(topt=25c) detector threshold stepwise setting with a step of 0.1v in the range of 0.7v to 5.0v high accuracy detector thre shold 0.8%( topt=25c) detector threshold te mperature coefficien t 30ppm/c (typ.) two output ty pes nch open drain and cmos three types of packages sot-23-5(min i-mold), sc-82ab, dfn(plp)-1010-4 applications cpu and logic circuit reset battery checker window comparator wave shaping circuit battery back-up circuit power failure detector
r3114x 2 block diagrams nch open drain (r3114xxx1a) cmos (r3114xxx1c) selection gide the package type, the detector threshold, the output type and the taping type of r3114 series can be designated at uesers? request by spec ifying the part number as follows; r3114xxx 1x -xx -x part number code description a designation of package type; n : sot-23-5 q : sc-82ab k : dfn(plp)-1010-4 b setting detector threshold (-v det ); stepwise setting with a step of 0.1v in the range of 0.7v to 5.0v c designation of output type; a : nch open drain (output ?l? at v dd =-v det ) c : cmos (output ?l? at v dd =-v det ) d designation of packing or taping type; tr prescribed as standard direction e designation of composition of pin solder; -f : lead free solder (sot-23-5, sc-82ab, dfn(plp)-1010-4) a b c d e vref v dd gnd out - + vref v dd gnd out - +
r3114x 3 pin configuration sot-23-5 sc-82ab dfn(plp)-1010-4 1 2 3 4 5 (mark side) 43 1 2 (mark side) pin description sot-23-5 sc-82ab dfn ( plp ) -1010-4 pin no. symbol pin no. symbol pin no. symbol 1 out 1 out 1 out 2 v dd 2 v dd 2 nc 3 gnd 3 nc 3 gnd 4 nc 4 gnd 4 v dd 5 nc 1 2 4 3
r3114x 4 absolute maxi mum ratings item symbol rating unit supply voltage v dd 7.0 v r3114xxx1a v ss -0.3 to 7.0 output voltage v out r3114xxx1c v ss -0.3 to v dd +0.3 v output current i out 20 ma r3114qxx1a/c 380 r3114nxx1a/c 420 power dissipation (mounted on board) p d *note1 r3114kxx1a/c 400 mw operation temperature ra nge topt -40 to +85 c storage temperature range tstg -55 to +125 c *note1: for power dissipation, please refer to the following pages absolute maximum ratings the absolute maximum ratings are threshold lim it values that must not be exceeded even for an instant under any condition. moreover, such values for any two items must not be reached simultaneously. operation above these absolut e maximum ratings may cause degradation or permanent damage to the device. these are stre ss ratings only and do not necessarily imply functional operation below these limits.
r3114x 5 power dissipation sc-82ab this specification is mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurements at the condition below: measurement conditions standard land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plastic (double sided) board dimensions 40mm x 40mm x 1.6mm copper ratio top side : approx. 50%, back side approx. 50% through-hole 0.5mm x 44pcs measurement result (topt=25c, tjmax=125c) standard land pattern free air power dissipation 380mw 150mw thermal resistance ja=(125-25c)/0.38w=263c /w 667c /w
r3114x 6 0 100 200 300 400 500 600 0 25 50 75 100 125 150 a mbience temperature (c) power dissipation pd (mw) 250 420 525 85 free air on board sot-23-5 this specification is mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurements at the condition below: (power dissipation of sot-23-5 is substitution of sot-23-6) measurement conditions standard land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plastic (double sided) board dimensions 40mm x 40mm x 1.6mm copper ratio top side : approx. 50%, back side approx. 50% through-hole 0.5mm x 44pcs measurement result (topt=25c, tjmax=125c) standard land pattern free air power dissipation 420mw 250mw thermal resistance ja=(125-25c)/0.42w=238c /w 400c /w measurement board pattern power dissipation ic mount area unit : mm - use in the oblique-line-area might be influence t he product-life cycle, please suppress by 9,000 hours about use. 9,000 hours will correspond in six years when using it for four hours a day. 40 40
r3114x 7 0 100 200 300 400 500 600 0 25 50 75 100 125 150 a mbience tem p erature ( c ) power dissi p ation p d ( mw ) 85 400 500 dfn(plp)-1010-4 this specification is mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurements at the condition below: measurement conditions standard land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plastic (double sided) board dimensions 40mm x 40mm x 1.6mm copper ratio top side : approx. 50%, back side approx. 50% through-hole 0.54mm x 24pcs measurement result (topt=25c, tjmax=125c) standard land pattern power dissipation 400mw (tjmax=125c) 500mw (tjmax=150c) thermal resistance ja=(125-25c)/0.4w=250c /w jc=67c /w power dissipation measurement board pattern ic mount area unit : mm - use in the oblique-line-area might be influence the pr oduct-life cycle, please s uppress by 13,000 hours about use. 13,000 hours will correspond in nine years when using it for four hours a day. 40 40
r3114x 8 electrical characteristics r3114x071a/c bold values indicate ?40c topt 85c, unless otherwise noted. [topt=25c] symbol item conditions min. typ. max. unit -v det detector threshold 0.6880 0.6775 0.7120 0.7225 v v hys detector threshold hysterisis 0.028 0.049 v v dd =0.6v 1.400 i ss supply current v dd =1.7v 1.200 a v ddh maximum operating voltage 6 v topt=25c 0.50 v ddl minimum operating voltage *note1 -40c topt 85c 0.55 v nch v dd =0.55v, v ds =0.05v v dd =0.6v, v ds =0.5v 7 0.020 i out output current (driver output pin) pch *note2 v dd =4.5v, v ds =-2.1v 0.650 ma i leak nch driver leakage current *note3 v dd =6.0v,v ds =7.0v 80 na ? -v det / ? topt detector threshold temperature coefficient -40c topt 85c 30 ppm/ c t plh output delay time v dd =0.55v 2.7v 100 s r3114x151a/c bold values indicate ?40c topt 85c, unless otherwise noted. [topt=25c] symbol item conditions min. typ. max. unit -v det detector threshold 1.4880 1.4775 1.5210 1.5225 v v hys detector threshold hysterisis 0.060 0.105 v v dd =1.4v 1.400 i ss supply current v dd =2.5v 1.200 a v ddh maximum operating voltage 6 v topt=25c 0.50 v ddl minimum operating voltage *note1 -40c topt 85c 0.55 v nch v dd =0.55v, v ds =0.05v v dd =1.0v, v ds =0.5v 7 0.400 i out output current (driver output pin) pch *note2 v dd =4.5v, v ds =-2.1v 0.650 ma i leak nch driver leakage current *note3 v dd =6.0v,v ds =7.0v 80 na ? -v det / ? topt detector threshold temperature coefficient -40c topt 85c 30 ppm/ c t plh output delay time v dd =0.55v 3.5v 100 s *note1 minimum operating voltage means the value of input voltage when output voltage maintains 0.1v or less. (in case of nch open drain output type, the output pin is pulled up with a resistance of 470k ? to 5.0v) *note2 in case of cmos type *note3 in case of nch open drain type
r3114x 9 r3114x271a/c bold values indicate ?40c topt 85c, unless otherwise noted. [topt=25c] symbol item conditions min. typ. max. unit -v det detector threshold 2.6784 2.6595 2.7216 2.7405 v v hys detector threshold hysterisis 0.108 0.189 v v dd =2.6v 1.500 i ss supply current v dd =3.7v 1.200 a v ddh maximum operating voltage 6 v topt=25c 0.50 v ddl minimum operating voltage *note1 -40c topt 85c 0.55 v nch v dd =0.55v, v ds =0.05v v dd =1.5v, v ds =0.5v 7 1.000 i out output current (driver output pin) pch *note2 v dd =4.5v, v ds =-2.1v 0.650 ma i leak nch driver leakage current *note3 v dd =6.0v,v ds =7.0v 80 na ? -v det / ? topt detector threshold temperature coefficient -40c topt 85c 30 ppm/ c t plh output delay time v dd =0.55v 4.7v 100 s r3114x451a/c bold values indicate ?40c topt 85c, unless otherwise noted. [topt=25c] symbol item conditions min. typ. max. unit -v det detector threshold 4.4640 4.4325 4.5360 4.5675 v v hys detector threshold hysterisis 0.180 0.315 v v dd =4.4v 1.700 i ss supply current v dd =5.5v 1.400 a v ddh maximum operating voltage 6 v topt=25c 0.50 v ddl minimum operating voltage *note1 -40c topt 85c 0.55 v nch v dd =0.55v, v ds =0.05v v dd =3.0v, v ds =0.5v 7 2.400 i out output current (driver output pin) pch *note2 v dd =4.5v, v ds =-2.1v 0.900 ma i leak nch driver leakage current *note3 v dd =6.0v,v ds =7.0v 80 na ? -v det / ? topt detector threshold temperature coefficient -40c topt 85c 30 ppm/ c t plh output delay time v dd =0.55v 6.0v 100 s *note1 minimum operating voltage means the value of input voltage when output voltage maintains 0.1v or less. (in case of nch open drain output type, the output pin is pulled up with a resistance of 470k ? to 5.0v) *note2 in case of cmos type *note3 in case of nch open drain type
r3114x 10 electrical characteristics by detector threshold r3114x071a/c to r3114x501a/c bold values indicate ?40c topt 85c, unless otherwise noted. [topt=25c] detector threshold1 detector threshold2 detector threshold hysteresis supply current1 supply current2 max. op. voltage min. op. voltage -v det1 [v] -v det2 [v] v hys [v] i ss1 [a] i ss2 [a] v ddh [v] v ddl [v] part number min. max. min. max. min. max. cond. max. cond. max. max. max. r3114x071a/c 0.6880 0.7120 0.6775 0.7225 0.028 0.049 r3114x081a/c 0.7880 0.8120 0.7775 0.8225 0.032 0.056 r3114x091a/c 0.8880 0.9120 0.8775 0.9225 0.036 0.063 r3114x101a/c 0.9880 1.0120 0.9775 1.0225 0.040 0.070 r3114x111a/c 1.0880 1.1120 1.0775 1.1225 0.044 0.077 r3114x121a/c 1.1880 1.2120 1.1775 1.2225 0.048 0.084 r3114x131a/c 1.2880 1.3120 1.2775 1.3225 0.052 0.091 r3114x141a/c 1.3880 1.4120 1.3775 1.4225 0.056 0.098 r3114x151a/c 1.4880 1.5120 1.4775 1.5225 0.060 0.105 1.400 r3114x161a/c 1.5872 1.6128 1.5760 1.6240 0.064 0.112 r3114x171a/c 1.6864 1.7136 1.6745 1.7255 0.068 0.119 r3114x181a/c 1.7856 1.8144 1.7730 1.8270 0.072 0.126 r3114x191a/c 1.8848 1.9152 1.8715 1.9285 0.076 0.133 r3114x201a/c 1.9840 2.0160 1.9700 2.0300 0.080 0.140 r3114x211a/c 2.0832 2.1168 2.0685 2.1315 0.084 0.147 r3114x221a/c 2.1824 2.2176 2.1670 2.2330 0.088 0.154 r3114x231a/c 2.2816 2.3184 2.2655 2.3345 0.092 0.161 r3114x241a/c 2.3808 2.4192 2.3640 2.4360 0.096 0.168 r3114x251a/c 2.4800 2.5200 2.4625 2.5375 0.100 0.175 r3114x261a/c 2.5792 2.6208 2.5610 2.6390 0.104 0.182 r3114x271a/c 2.6784 2.7216 2.6595 2.7405 0.108 0.189 r3114x281a/c 2.7776 2.8224 2.7580 2.8420 0.112 0.196 r3114x291a/c 2.8768 2.9232 2.8565 2.9435 0.116 0.203 r3114x301a/c 2.9760 3.0240 2.9550 3.0450 0.120 0.210 1.500 1.200 r3114x311a/c 3.0752 3.1248 3.0535 3.1465 0.124 0.217 r3114x321a/c 3.1744 3.2256 3.1520 3.2480 0.128 0.224 r3114x331a/c 3.2736 3.3264 3.2505 3.3495 0.132 0.231 r3114x341a/c 3.3728 3.4272 3.3490 3.4510 0.136 0.238 r3114x351a/c 3.4720 3.5280 3.4475 3.5525 0.140 0.245 r3114x361a/c 3.5712 3.6288 3.5460 3.6540 0.144 0.252 r3114x371a/c 3.6704 3.7296 3.6445 3.7555 0.148 0.259 r3114x381a/c 3.7696 3.8304 3.7430 3.8570 0.152 0.266 r3114x391a/c 3.8688 3.9312 3.8415 3.9585 0.156 0.273 r3114x401a/c 3.9680 4.0320 3.9400 4.0600 0.160 0.280 1.600 1.300 r3114x411a/c 4.0672 4.1328 4.0385 4.1615 0.164 0.287 r3114x421a/c 4.1664 4.2336 4.1370 4.2630 0.168 0.294 r3114x431a/c 4.2656 4.3344 4.2355 4.3645 0.172 0.301 r3114x441a/c 4.3648 4.4352 4.3340 4.4660 0.176 0.308 r3114x451a/c 4.4640 4.5360 4.4325 4.5675 0.180 0.315 r3114x461a/c 4.5632 4.6368 4.5310 4.6690 0.184 0.322 r3114x471a/c 4.6624 4.7376 4.6295 4.7705 0.188 0.329 r3114x481a/c 4.7616 4.8384 4.7280 4.8720 0.192 0.336 r3114x491a/c 4.8608 4.9392 4.8265 4.9735 0.196 0.343 r3114x501a/c 4.9600 5.0400 4.9250 5.0750 0.200 0.350 v dd = -v det -0.1v 1.700 v dd = -v det +1.0v 1.400 6 0.50 0.55 *note1 *note1 v dd value when output voltage is equal or less than 0.1v . in the case of nch open drain output type, the output pin is pulled up to 5.0v through 470k ? resistor.
r3114x 11 *note2 in the case of cmos output type: when the voltage is forced from 0.55v to (-v det )+2.0v or a 6.0v pulse voltage is added to v dd , time interval that the output voltage reaches v dd /2. in the case of nch open drain output type: t he output pin is pulled up to 5.0v through 470k ? , and when the voltage is forced from 0.55v to (-v det )+2.0v or a 6.0v pulse voltage is added to v dd , time interval that the output voltage reaches 2.5v. nch driver output current1 nch driver output current2 pch driver output current nch driver leak current detector threshold temperature coefficient output delay time i out1 [a] i out2 [ma] i out3 [ma] i leak [na] ? -v det / ? topt[ppm/c] t plh [s] cond. min. cond. min. cond. min. cond. max. typ. cond. max. v dd = 0.6v v ds = 0.5v 0.020 v dd = 1.0v v ds = 0.5v 0.400 v dd = 1.5v v ds = 0.5v 1.000 v dd = 4.5v v ds = -2.1v 0.650 v dd = 0.55v -v det +2.0v *note2 100 v dd = 0.55v v ds = 0.05v 7 v dd = 3.0v v ds = 0.5v 2.400 v dd = 6.0v v ds = -2.1v 0.900 v dd = 6.0v v ds = 7.0v 80 30 v dd = 0.55v 6.0v *note2 200
r3114x 12 operation operation of (r3114xxx1a/c) block diagram 1 1 2 3 4 5 i x v dd operation diagram ii x v dd explanation of operation step 1. the output voltage is equal to the supply voltage (nch open drain type is equal to the pull-up voltage). step 2. at point ?a?, vref v dd x(r2+r3)/(r1+r2+r3) is true, as a resul t, the output of comparator is reversed from "h" to "l", therefore the output voltage becomes the gnd level. the voltage level of point a means a detector threshold voltage (-v det ). step 3. when the supply voltage is lower than the minimum operating voltage, the operation of the output transistor becomes indefinite. the output voltage is equal to the pull-up voltage for nch open drain type. step 4. the output voltage is equal to the gnd level. step 5. at point ?b?, vref v dd xr2/(r1+r2) is true, as a result, the output of comparator is reversed from "l" to "h", then the output voltage is equal to the pull-up vo ltage. the voltage level of point b means a released voltage (+v det ). *) the difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis. step 1 2 3 4 5 comparator(-) pin input voltage i ii ii ii i comparator output l h indefinite h l hys tr. off on indefinite on off nch off on indefinite on off output tr. pch on off indefinite off on in the case of cmos output type, the drain of nch tr. and pch tr. are connected to the out pin. in the case of nch open drain output type, the drain of nch tr. is connected to the out pin. (out pin should be pulled up to v dd or an external voltage level.) r2+r3 r1+r2+r3 r2 r1+r2 supply voltage v dd gnd detector threshold hysteresis a b released voltage +v det detector voltage -v det min. operating voltage v ddl gnd output delay time t plh detector delay time t phl output voltage v out vref v dd gnd out - + comparator r1 r2 r3 hys tr. nch pch
r3114x 13 definition of output delay time tplh output delay time (t plh) is defined as follows: 1. in the case of nch o pen drain output:(r3114xxxxa) under the condition of the output pin (out) is pulled up through a resistor of 470k ? to 5v, the time interval between the rising edge of v dd pulse from 0.55v to (-v det )+2.0v or the time interval of 6.0v pulse voltage is supplied, the becoming of the output voltage to 2.5v. 2. in the case of cmos output:(r3114xxxxc) the time interval between the rising edge of v dd pulse from 0.55v to (-v det ) ? +2.0v or the time interval of 6.0v pulse voltage is supplied, the becoming of the output voltage to v dd /2. nch open drain output cmos output supply voltage v dd output voltage v out gnd gnd 0.55v -v det +2.0v or 6.0v t phl t plh -v det +2.0v or 6.0v -v det +2.0v or 6.0v 2 supply voltage v dd output voltage v out gnd gnd 0.55v -v det +2.0v or 6.0v 5.0v 2.5v t phl t plh
r3114x 14 test circuits supply current test circuit detector threshold test circuit (pull-up circuit is not necessary for cmos output type) nch driver output current test circuit pch driver output test circuit *apply to cmos output type only nch driver output current leak test circuit *apply to nch open drain output type only output delay time test circuit (pull-up circuit is not necessary for cmos output type) r3114x series v dd gnd i ss v dd r3114c series v dd gnd v dd out i out v dd -|v ds | r3114x series v dd gnd v dd out v ds i out r3114a series v dd gnd 6v out 7v i leak r3114x series v dd gnd v dd 470k ? out 5v or v dd r3114x series v dd gnd v dd out supply voltage v dd output voltage v out gnd gnd 50% 100% 0.55v t phl t plh 470k ? 5v -v det +2.0v or 6.0v
r3114x 15 typical characteristics 1) supply current vs. input voltage r3114x071a/c r3114x151a/c 0.0 0.2 0.4 0.6 0.8 1.0 01234567 input voltage v dd [v] supply current i ss [ua] topt=85 -40 25 0.0 0.2 0.4 0.6 0.8 1.0 01234567 input voltage v dd [v] supply current i ss [ua] topt=85 -40 25 r3114x271a/c r3114x451a/c 0.0 0.2 0.4 0.6 0.8 1.0 01234567 input voltage v dd [v] supply current i ss [u ] topt=85 -40 25 0.0 0.2 0.4 0.6 0.8 1.0 01234567 input voltage v dd [v] supply current i ss [u ] topt=85 -40 25
r3114x 16 2) detector threshold hysteresis vs. temperature r3114x071a/c r3114x151a/c 0.690 0.700 0.710 0.720 0.730 0.740 0.750 -50 -25 0 25 50 75 100 temerature topt[ b c] detecor threshold v det [v] +v det -v det 1.480 1.500 1.520 1.540 1.560 1.580 1.600 -50 -25 0 25 50 75 100 temperature topt[ b c] detector threshold v det [v] +v det -v det r3114x271a/c r3114x451a/c 2.650 2.700 2.750 2.800 2.850 2.900 -50 -25 0 25 50 75 100 temperature topt[ b c] detector threshold v det [v] +v det -v det 4.400 4.500 4.600 4.700 4.800 4.900 -50 -25 0 25 50 75 100 temperature topt[ b c] detector threshold v det [v] +v det -v det
r3114x 17 3) output voltage vs. input voltage r3114x071a r3114x151a 470k ? v dd pull-up 470k ? v dd pull-up 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.0 0.2 0.4 0.6 0.8 1.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b c 25 b c 0.0 0.5 1.0 1.5 2.0 2.5 0.0 0.4 0.8 1.2 1.6 2.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b c 25 b c r3114x271a r3114x451a 470k ? v dd pull-up 470k ? v dd pull-up 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b c 25 b c 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b c 25 b c
r3114x 18 r3114x071a r3114x151a 470k ? 5v pull-up 470k ? 5v pull-up 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 0.2 0.4 0.6 0.8 1.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b 25 b c 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 0.4 0.8 1.2 1.6 2.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b 25 b c r3114x271a r3114x451a 470k ? 5v pull-up 470k ? 5v pull-up 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b 25 b c 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 input voltage v dd [v] output voltage v out [v] 85 b c topt=-40 b 25 b c
r3114x 19 4) nch driver output current vs. v ds r3114x071a/c r3114x151a/c v ds =0.5v v ds =0.5v 0.00 0.05 0.10 0.15 0.20 0.25 0.0 0.2 0.4 0.6 0.8 1.0 input voltage v dd [v] nch driver output current i out [ma] topt=85 b c -40 b c 25 b c 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0.0 0.5 1.0 1.5 2.0 input voltage v dd [v] nch driver output current i out [ma] topt=-40 b c 85 b c 25 b c r3114x271a/c r3114x451a/c v ds =0.5v v ds =0.5v 0.0 1.5 3.0 4.5 6.0 7.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 input voltage v dd [v] nch driver output current i out [ma] topt=-40 b c 85 b c 25 b c 0.0 2.0 4.0 6.0 8.0 10.0 12.0 0.0 1.0 2.0 3.0 4.0 5.0 input voltage v dd [v] nch driver output current i out [ma] topt=-40 b c 85 b c 25 b c
r3114x 20 5) nch driver output current vs. input voltage r3114x071a/c r3114x151xa/c 0.00 0.05 0.10 0.15 0.20 0.0 0.2 0.4 0.6 v ds [v] nch driver output current i out [ma] v dd =0.6v 0.0 0.2 0.4 0.6 0.8 0.0 0.2 0.4 0.6 0.8 1.0 v ds [v] nch driver output current i out [ma] v dd =0.6v v dd =1.0v r3114x271a/c r3114x451a/c 0 2 4 6 8 0.0 0.5 1.0 1.5 2.0 v ds [v] nch driver output current i out [ma] v dd =0.6v v dd =1.0v v dd =2.0v 0 5 10 15 20 0.0 1.0 2.0 3.0 4.0 v ds [v] nch driver output current i out [ma] v dd =1.0v v dd =2.0v v dd =3.0v v dd =4.0v v dd =0.6v
r3114x 21 6) pch driver output current vs. input voltage r3114x071c r3114x151c v ds =-2.1v v ds =-2.1v 0.0 0.5 1.0 1.5 2.0 01234567 input voltage v dd [v] pch driver output current i out [ma] topt=-40 b c 85 b c 25 b c 0.0 0.5 1.0 1.5 2.0 01234567 input voltage v dd [v] pch driver output current i out [ma] topt=-40 b c 85 b c 25 b c r3114x271c r3114x451c v ds =-2.1v v ds =-2.1v 0.0 0.5 1.0 1.5 2.0 01234567 input voltage v dd [v] pch driver output current i out [ma] topt=-40 b c 85 b c 25 b c 0.0 0.5 1.0 1.5 2.0 01234567 input voltage v dd [v] pch driver output current i out [ma] topt=-40 b c 85 b c 25 b c
r3114x 22 7) pch driver output current vs. v ds r3114x071c r3114x151c 0.0 0.5 1.0 1.5 2.0 2.5 0123456 v ds [v] pch driver output current i out [ma] v dd =6.0 v dd =5.0v v dd =4.0v v dd =3.0v v dd =2.0v v dd =1.0v 0.0 0.5 1.0 1.5 2.0 2.5 0123456 v ds [v] pch driver output current i out [ma] v dd =6.0 v dd =5.0v v dd =4.0v v dd =3.0v v dd =2.0v r3114x271c r3114x451c 0.0 0.5 1.0 1.5 2.0 2.5 0123456 v ds [v] pch driver output current i out [ma] v dd =6.0 v dd =5.0v v dd =4.0v v dd =3.0v 0.0 0.5 1.0 1.5 2.0 2.5 0123456 v ds [v] pch driver output current i out [ma] v dd =6.0 v dd =5.0v
r3114x 23 8) output delay time vs. load capacitance r3114x071a r3114x151a 0.01 0.1 1 10 100 0.0001 0.001 0.01 0.1 load capacitance c out [uf] delay time t plh / t phl [ms] t plh t phl 0.01 0.1 1 10 100 0.0001 0.001 0.01 0.1 load capacitance c out [uf] delay time t plh / t phl [ms] t plh t phl r3114x271a r3114x451a 0.01 0.1 1 10 100 0.0001 0.001 0.01 0.1 load capacitance c out [uf] delay time t plh / t phl [ms] t plh t phl 0.01 0.1 1 10 100 0.0001 0.001 0.01 0.1 load capacitance c out [uf] delay time t plh / t phl [ms] t plh t phl
r3114x 24 typical application cpu reset circuit 1 (nch open drain output) (1) (2) cpu reset circuit 2 (cmos output) output delay time circuit 1 output delay time circuit 2 (nch open drain output) (nch open drain output) memory back-up circuit r3114c series gnd v dd out reset cpu gnd v cc v dd gnd r3114a series gnd v dd rup out reset cpu vcc v dd r c r3114a series gnd v dd rup out reset cpu gnd v cc v dd r3114a series gnd rup out reset cpu gnd v cc v dd v dd 1 v dd 2 r3114c series gnd v dd ram1 v cc gnd cs ram2 v cc gnd cs ram3 v cc gnd cs ram4 v cc gnd cs v cc gnd y1 y2 y3 y4 a b c out v dd d2 d1 r3114a series gnd v dd 1 out reset cpu v dd gnd v cc rup c v dd 2 input voltage to r3114a series is equal to in p ut volta g e to cpu input voltage to r3114a series is unequal to in p ut volta g e to cpu
r3114x 25 detector threshold adjustable circuit 1 (nch open drain output) detector threshold adjustable circuit 2 (nch open drain output) window comparator circuit (nch open drain output) r3114a series gnd v dd out v dd r1 c r2 v up ru p r3114a series gnd v dd rup1 out v dd r3114a series gnd v dd rup2 out -v det 1 -v det 2 wc_out gnd gnd wc_out v dd -v det 2 -v det 1 r3114c series gnd out v dd load solar battery r1 r2 r3 r4 d1 r3114a series gnd v dd out v dd r1 r2 v up ru p r3114a series gnd v dd rup v dd out a djustable detector threshold = (-vdet) x (r1+r2) / r2 hysteresis voltage = (v hys ) x (r1+r2) / r2 *1) to prevent oscillation, set r1 1k ? , r2 100 ? *2) if the value of r1 is set excessively large, voltage drop may occur caused by the supply current of ic itself, and detecto r threshold and hysteresis voltage may vary. *3) if vup and v dd are connected, the voltage dropdown caused by rup, may cause difference in the hysteresis voltage. a djustable detector threshold = (-v det ) x (r1+r2) / r2 hysteresis voltage = v hys x (r1+r2) / r2 *1) to prevent oscillation, set r1 100k ? , c 0.01uf. *2) if the value of r1 is set excessively large, voltage drop ma y occur caused by the supply current of ic itself, and detecto r threshold and hysteresis voltage may vary. *3) if vup and v dd are connected, the voltage dropdown caused by rup, may cause difference in the hysteresis voltage. *4) if the value of r1, r2 and c are set excessively large, the delay of the start-up may become too long. over-charge preventing circuit voltage level indicator circuit (lighted when the power runs out)
r3114x 26 technical notes when r3114xxx1a/c is used in figure x, if the value of r1 is set excessively large, the dropdown voltage caused by the consumption current of ic itself, may vary the detector threshold and the release voltage. also, if the value of r1 is set excessively large, there may be delay in start-up and may cause oscillation generated by cross conduction current. when r3114xxx1a/c is used in figure y, if the value of r1 is set excessively large, the dropdown voltage caused by theconsumption current of ic itself, may vary the detecor threshold and the released voltage. also, if the value of r1 and r2 is set excessively large, there may be delay in start-up and may cause oscillation generated by cross conduction current. when r3114xxx1a/c is used in figure z, if the value of r1 is set excessively large, the dropdown voltage caused by the consumption current of ic itself may vary the detector threshold and the release voltage. also, if the value of r1 is set excessively large, there may be delay in start-up and may cause oscillation generated by cross conduction current. furthermore, if the value of r1 is set large and the value of r3 is set small, released voltage level may shift and the minimum operating voltage may differ. if the value of r3 is set excessively small from r1, release may not occure and may cause oscillation. r3114x series gnd v dd out v dd r3114x series gnd v dd out v dd r3114x series gnd v dd out v dd figure x figure y figure z r1 r1 r1 r2 r3

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