r3111x series low voltage detector no.ea-056-110131 1 outline the r3111x series are cmos-based voltage detector ic s with high detector threshold accuracy and ultra-low supply current, which can be operated at an extremely lo w 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 hysteresis circuit. the detector thre shold is fixed with high accuracy internally and does not require any adjustment. three output types, nch open drain ?l? type, nch op en drain ?h? type and cmos type are available. the r3111x series are operable at a lower voltage t han that for the rx5vl series, and can be driven by a single battery. seven types of packages, to-92, sot-89, sot-23 -3, sot-23-5, sc-82ab, sc-88a and son1612-6 are available. features ? supply current ......................................................................typ. 0.8 a (-v det = 1.5v, v dd = -v det ? 0.1v) ? operating voltage rang e......................................................0.7v to 10.0v (t opt = 25 c) ? detector threshol d range.................................................... 0.9v to 6.0v (0.1v steps) ( for other voltages, please re fer to mark informations.) ? detector threshold accuracy................................................ 2.0% ? temperature-drift coefficient of detector threshold ............typ. 100ppm/ c ? output types .........................................................................nch open drain ?l?, nch open drain ?h?, a nd cmos ? packages ..............................................................................son161 2-6, sc-82ab, sc-88a, sot-23-3, sot-23-5, sot-89, to-92 applications ? cpu and logic circuit reset ? battery checker ? window comparator ? wave shaping circuit ? battery back-up circuit ? power failure detector
r3111x 2 block diagrams r3111xxxxa r3111xxxxb out v dd vref gnd out v dd vref gnd r3111xxxxc out v dd gnd vref
r3111x 3 selection guide the package type, the detector thre shold, the output type and the taping type for the ics can be selected at the users? request. the selection can be made with designating the part number as shown below; product name package quantity per reel pb free halogen free r3111dxx1 ? -tr-fe son1612-6 4,000 pcs yes yes r3111qxx1 ? -tr-fe sc-82ab 3,000 pcs yes yes r3111qxx2 ? -tr-fe sc-88a 3,000 pcs yes yes r3111nxx2$-tr-fe sot-23-3 3,000 pcs yes yes r3111nxx1$-tr-fe sot-23-5 3,000 pcs yes yes r3111hxx1$-t1-fe sot-89 1,000 pcs yes yes r3111exx1$-tz-f to-92 2,500 pcs yes no xx : the detector threshold can be designated in the range from 0.9v(09) to 6.0v(60) in 0.1v steps. (for other voltages, please refer to mark informations.) ? : designation of output type (a) nch open drain (output "l" at detection) (b) nch open drain (output "h" at detection) (c) cmos (output "l" at detection) $ : designation of output type (a) nch open drain (output "l" at detection) (c) cmos (output "l" at detection)
r3111x 4 pin configurations z to-92 z sot-89 z sot-23-3 z sot-23-5 3 12 (mark side) 3 12 (mark side) 12 3 (mark side) 123 4 5 (mark side) z sc-82ab z sc-88a z son1612-6 4 3 1 2 (mark side) 5 4 1 3 2 (mark side) 123 654 (mark side) pin descriptions z to-92 z sot-89 z sot-23-3 z sot-23-5 pin no. symbol pin no. symbol pin no. symbol pin no. symbol 1 v dd 1 out 1 out 1 out 2 gnd 2 v dd 2 gnd 2 v dd 3 out 3 gnd 3 v dd 3 gnd 4 nc 5 nc z sc-82ab z sc-88a z son1612-6 pin no. symbol pin no. symbol pin no. symbol 1 out 1 out 1 out 2 v dd 2 nc 2 v dd 3 nc 3 v dd 3 gnd 4 gnd 4 nc 4 nc 5 gnd 5 v dd 6 nc
r3111x 5 absolute maximum ratings symbol item rating unit v dd supply voltage 12 v v out1 output voltage (cmos) v ss ? 0.3 to v dd + 0.3 v v out2 output voltage (nch) v ss ? 0.3 to 12 v i out output current 70 ma power dissipation (to-92)* 300 power dissipation (sot-89)* 900 power dissipation (sot-23-3)* 420 power dissipation (sot-23-5)* 420 power dissipation (sc-82ab)* 380 power dissipation (sc-88a)* 380 p d power dissipation (son1612-6)* 500 mw topt operating temperature range ? 40 to 85 c tstg storage temperature range ? 55 to 125 c tsolder lead temperature (soldering) 260 c, 10s * ) for power dissipation, please refer to package information. absolute maximum ratings electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safe ty for both device and sy stem using the device in the field. the functional operation at or over these absolute maximum ratings is not assured. recommended operating conditions (electrical characteristics) all of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. the semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. and the semiconductor de vices may receive serious damage when they continue to operate over the recommended operating conditions.
r3111x 6 electrical characteristics ? r3111x09xa/c topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 0.882 0.900 0.918 v v hys detector threshold hysteresis 0.027 0.045 0.063 v i ss supply current v dd = 0.80v v dd = 2.90v 0.8 0.9 2.4 2.7 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v nch v ds = 0.05v,v dd = 0.70v v ds = 0.50v,v dd = 0.85v 0.01 0.05 0.05 0.50 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 4.5v 1.0 2.0 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? r3111x18xa/c topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 1.764 1.800 1.836 v v hys detector threshold hysteresis 0.054 0.090 0.126 v i ss supply current v dd = 1.70v v dd = 3.80v 0.8 1.0 2.4 3.0 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v nch v ds = 0.05v, v dd = 0.70v v ds = 0.50v, v dd = 1.50v 0.01 1.00 0.05 2.00 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 4.5v 1.0 2.0 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? note1: minimum operating voltage means the value of input voltage when output voltage maintains 0.1v or less. (in the case of nch open drain output type, the output pin is pulled up with a resistance of 470k to 5.0v.) ? note2: in the case of cmos output type: t he time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to (( + v det ) + 2.0v)/2. in the case of nch open drain output type: the ou tput pin is pulled up with a resistance of 470k to 5.0v, the time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to 2.5v.
r3111x 7 ? r3111x27xa/c topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 2.646 2.700 2.754 v v hys detector threshold hysteresis 0.081 0.135 0.189 v i ss supply current v dd = 2.60v v dd = 4.70v 0.9 1.1 2.7 3.3 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v nch v ds = 0.05v,v dd = 0.70v v ds = 0.50v,v dd = 1.50v 0.01 1.00 0.05 2.00 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 4.5v 1.0 2.0 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? r3111x36xa/c topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 3.528 3.600 3.672 v v hys detector threshold hysteresis 0.108 0.180 0.252 v i ss supply current v dd = 3.47v v dd = 5.60v 1.0 1.2 3.0 3.6 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v nch v ds = 0.05v,v dd = 0.70v v ds = 0.50v,v dd = 1.50v 0.01 1.00 0.05 2.00 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 4.5v 1.0 2.0 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? note1: minimum operating voltage means the value of input voltage when output voltage maintains 0.1v or less. (in the case of nch open drain output type, the output pin is pulled up with a resistance of 470k to 5.0v.) ? note2: in the case of cmos output type: t he time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to (( + v det ) + 2.0v)/2. in the case of nch open drain output type: the ou tput pin is pulled up with a resistance of 470k to 5.0v, the time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to 2.5v.
r3111x 8 ? r3111x45xa/c topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 4.410 4.500 4.590 v v hys detector threshold hysteresis 0.135 0.225 0.315 v i ss supply current v dd = 4.34v v dd = 6.50v 1.1 1.3 3.3 3.9 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v nch v ds = 0.05v, v dd = 0.70v v ds = 0.50v, v dd = 1.50v 0.01 1.00 0.05 2.00 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 8.0v 1.5 3.0 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? r3111x54xa/c topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 5.292 5.400 5.508 v v hys detector threshold hysteresis 0.162 0.270 0.378 v i ss supply current v dd = 5.20v v dd = 7.40v 1.2 1.4 3.6 4.2 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v nch v ds = 0.05v, v dd = 0.70v v ds = 0.50v, v dd = 1.50v 0.01 1.00 0.05 2.00 ma i out output current (driver output pin) pch v ds =? 2.1v, v dd = 8.0v 1.5 3.0 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? note1: minimum operating voltage means the value of input voltage when output voltage maintains 0.1v or less. (in the case of nch open drain output type, the output pin is pulled up with a resistance of 470k to 5.0v.) ? note2: in the case of cmos output type: t he time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to (( + v det ) + 2.0v)/2. in the case of nch open drain output type: the ou tput pin is pulled up with a resistance of 470k to 5.0v, the time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to 2.5v.
r3111x 9 ? r3111q231b topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 2.254 2.300 2.346 v v hys detector threshold hysteresis 0.069 0.115 0.161 v i ss supply current v dd = 2.2v v dd = 4.3v 0.9 1.1 2.7 3.3 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v i out output current (driver output pin) nch v ds = 0.10v,v dd = 6.5v 2.5 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? r3111q441b topt = 25 c symbol item conditions min. typ. max. unit -v det detector threshold 4.312 4.400 4.488 v v hys detector threshold hysteresis 0.132 0.220 0.308 v i ss supply current v dd = 4.24v v dd = 6.4v 1.1 1.3 3.3 3.9 a v ddh maximum operating voltage 10 v topt = 25 c 0.55 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.65 0.80 v i out output current (driver output pin) nch v ds = 0.10v, v dd = 6.5v 2.5 ma t plh output delay time ? note2 100 s -v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c ? note1: minimum operating voltage means the value of input voltage when output voltage maintains 0.1v or less. (in the case of nch open drain output type, the output pin is pulled up with a resistance of 470k to 5.0v.) ? note2: in the case of cmos output type: t he time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to (( + v det ) + 2.0v)/2. in the case of nch open drain output type: the ou tput pin is pulled up with a resistance of 470k to 5.0v, the time interval between the rising edge of v dd input pulse from 0.7v to ( + v det ) + 2.0v and output voltage level becoming to 2.5v.
r3111x 10 timing chart detector threshold t plh t plh t plh gnd gnd v ddl -v det +v det detector threshold released voltage minimum operating voltage pull-up voltage supply voltage (v dd ) output voltage (v out ) r3111xxxxa r3111xxxxb r3111xxxxc detector threshold detector threshold hysteresis hysteresis hysteresis definition of output delay time output delay time (t plh ) is defined as follows: 1. in the case of nch o pen drain output:(r3111xxxxa/b) 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 0.7v to ( + v det ) + 2.0v and becoming of the output voltage to 2.5v. 2. in the case of cmos output:(r3111xxxxc) the time interval between the rising edge of v dd pulse from 0.7v to ( + v det ) + 2.0v and becoming of the output voltage to (( + v det ) + 2.0v) / 2. + v det + 2.0v 0.7v supply voltage (v dd ) gnd 5.0v 2.5v gnd output voltage (v out ) t plh t phl + v det + + + 2.0v 0.7v gnd gnd t plh t phl + + 2.0v + + 2.0v 2 supply voltage (v dd ) output voltage (v out ) nch open drain output nch open drain output cmos output (r3111xxxxa) (r3111xxxxb) (r3111xxxxc)
r3111x 11
r3111x 12 electrical characteristics by detector threshold ? r3111x09x to r3111x60x detector threshold detector threshold hysteresis supply current 1 supply current 2 -v det [ v ] v hys [ v ] i ss1 [ a ] i ss2 [ a ] part number min. typ. max. min. typ. max. condition typ. max. condition typ. max. r3111x09xx 0.882 0.900 0.918 0.027 0.045 0.063 0.9 2.7 r3111x10xx 0.980 1.000 1.020 0.030 0.050 0.070 r3111x11xx 1.078 1.100 1.122 0.033 0.055 0.077 r3111x12xx 1.176 1.200 1.224 0.036 0.060 0.084 r3111x13xx 1.274 1.300 1.326 0.039 0.065 0.091 r3111x14xx 1.372 1.400 1.428 0.042 0.070 0.098 r3111x15xx 1.470 1.500 1.530 0.045 0.075 0.105 r3111x16xx 1.568 1.600 1.632 0.048 0.080 0.112 r3111x17xx 1.666 1.700 1.734 0.051 0.085 0.119 r3111x18xx 1.764 1.800 1.836 0.054 0.090 0.126 r3111x19xx 1.862 1.900 1.938 0.057 0.095 0.133 0.8 2.4 1.0 3.0 r3111x20xx 1.960 2.000 2.040 0.060 0.100 0.140 r3111x21xx 2.058 2.100 2.142 0.063 0.105 0.147 r3111x22xx 2.156 2.200 2.244 0.066 0.110 0.154 r3111x23xx 2.254 2.300 2.346 0.069 0.115 0.161 r3111x24xx 2.352 2.400 2.448 0.072 0.120 0.168 r3111x25xx 2.450 2.500 2.550 0.075 0.125 0.175 r3111x26xx 2.548 2.600 2.652 0.078 0.130 0.182 r3111x27xx 2.646 2.700 2.754 0.081 0.135 0.189 r3111x28xx 2.744 2.800 2.856 0.084 0.140 0.196 r3111x29xx 2.842 2.900 2.958 0.087 0.145 0.203 v dd = (-v det ) ? 0.10v 0.9 2.7 1.1 3.3 r3111x30xx 2.940 3.000 3.060 0.090 0.150 0.210 r3111x31xx 3.038 3.100 3.162 0.093 0.155 0.217 r3111x32xx 3.136 3.200 3.264 0.096 0.160 0.224 r3111x33xx 3.234 3.300 3.366 0.099 0.165 0.231 r3111x34xx 3.332 3.400 3.468 0.102 0.170 0.238 r3111x35xx 3.430 3.500 3.570 0.105 0.175 0.245 r3111x36xx 3.528 3.600 3.672 0.108 0.180 0.252 r3111x37xx 3.626 3.700 3.774 0.111 0.185 0.259 r3111x38xx 3.724 3.800 3.876 0.114 0.190 0.266 r3111x39xx 3.822 3.900 3.978 0.117 0.195 0.273 v dd = (-v det ) ? 0.13v 1.0 3.0 1.2 3.6 r3111x40xx 3.920 4.000 4.080 0.120 0.200 0.280 r3111x41xx 4.018 4.100 4.182 0.123 0.205 0.287 r3111x42xx 4.116 4.200 4.284 0.126 0.210 0.294 r3111x43xx 4.214 4.300 4.386 0.129 0.215 0.301 r3111x44xx 4.312 4.400 4.488 0.132 0.220 0.308 r3111x45xx 4.410 4.500 4.590 0.135 0.225 0.315 r3111x46xx 4.508 4.600 4.692 0.138 0.230 0.322 r3111x47xx 4.606 4.700 4.794 0.141 0.235 0.329 r3111x48xx 4.704 4.800 4.896 0.144 0.240 0.336 r3111x49xx 4.802 4.900 4.998 0.147 0.245 0.343 v dd = (-v det ) ? 0.16v 1.1 3.3 1.3 3.9 r3111x50xx 4.900 5.000 5.100 0.150 0.250 0.350 r3111x51xx 4.998 5.100 5.202 0.153 0.255 0.357 r3111x52xx 5.096 5.200 5.304 0.156 0.260 0.364 r3111x53xx 5.194 5.300 5.406 0.159 0.265 0.371 r3111x54xx 5.292 5.400 5.508 0.162 0.270 0.378 r3111x55xx 5.390 5.500 5.610 0.165 0.275 0.385 r3111x56xx 5.488 5.600 5.712 0.168 0.280 0.392 r3111x57xx 5.586 5.700 5.814 0.171 0.285 0.399 r3111x58xx 5.684 5.800 5.916 0.174 0.290 0.406 r3111x59xx 5.782 5.900 6.018 0.177 0.295 0.413 r3111x60xx 5.880 6.000 6.120 0.180 0.300 0.420 v dd = (-v det ) ? 0.20v 1.2 3.6 v dd = (-v det ) + 2.0v 1.4 4.2 *1) in the case of cmos output type; when the voltage is forced to v dd from 0.7v to ( + v det ) + 2.0v, time interval between the rising edge of v dd and the reaching point at (( + v det ) + 2.0v)/2. in the case of nch open drain output type : the output pin is pulled up to 5v through 470k , and when the voltage is forced to v dd from 0.7v to ( + v det ) + 2.0v, time interval between the rising edge of vdd and the reaching point at (( + v det ) + 2.0v)/2. *2) 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 t o 5v through 470k resistor. condition 1: topt = 25 c condition 2: ? 40 c < = topt < = 85 c
r3111x 13 output current 1 output current 2 * 3 output delay time minimum operating voltage detector threshold temperature coefficient i out1 [ ma ] i out2 [ ma ] t plh [ s ] v ddl [ v ] -v det / topt [ ppm/ c ] condition min. typ. condition min. typ. max. typ. max. condition typ. v dd = 0.85v 0.05 0.5 v dd = 1.0v 0.2 1.0 nch v ds = 0.05v v dd = 0.7v nch v ds = 0.10v v dd = 6.5v 0.01 2.5 0.05 - nch v ds = 0.5v v dd = 1.5v 1.0 2.0 100 * 1 * 2 condition 1 0.55 condition 2 0.65 * 2 condition 1 0.70 condition 2 0.80 ? 40 c < = < = 85 c 100 *3) only a/c versions.
r3111x 14 operation ? operation of r3111xxxxa vref ra rb rc v dd out gnd tr.1 nch com p arato r out pin should be pulled-up to v dd or an external voltage level. block diagram (r3111xxxxa) 13 5 a b t plh 2 4 gnd gnd v ddl - v det +v det detector threshold released voltage minimum operating voltage pull-up voltage detector threshold hysteresis supply voltage (v dd ) output voltage (v out ) step 1 2 3 4 5 comparator ( + ) pin input voltage i ii ii ii i comparator output h l indefinite l h tr.1 off on indefinite on off output tr. nch off on indefinite on off i v dd rb + rc ra + rb + rc ii v dd rb ra + rb operation diagram ? explanation of operation step 1. the output voltage is equal to the pull-up voltage. step 2. at point ?a?, vref > = v dd (rb + rc)/(ra + rb + rc) is true, as a result, the output of comparator is reversed from "h" to "l", therefore the output voltage become s 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, t he operation of the output transistor becomes indefinite. the output voltage is equal to the pull-up voltage. step 4. the output voltage is equal to the gnd level. step 5. at point ?b?, vref < = v dd rb/(ra + rb) 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. output delay time
r3111x 15 ? operation of r3111xxxxb vref ra rb rc v dd out gnd tr.1 nch com p arator out pin should be pulled-up to v dd or an external voltage level. block diagram (r3111xxxxb) t plh gnd gnd v ddl - v det +v det detector threshold released voltage minimum operating voltage pull-up voltage 1 2 3 a b detector threshold hysteresis supply voltage (v dd ) output voltage (v out ) step 1 2 3 comparator ( ? ) pin input voltage i ii i comparator output l h l tr.1 off on off output tr. nch on off on i v dd rb + rc ra + rb + rc ii v dd rb ra + rb operation diagram ? explanation of operation step 1. the output voltage is equal to the gnd level. step 2. at point ?a?, vref > = v dd (rb + rc)/(ra + rb + rc) is true, as a result, the output of comparator is reversed from "l" to "h", therefore the output voltage become s the pull-up voltage. the voltage level of point a means a detector threshold voltage ( ? v det ). step 3. at point ?b?, vref < = v dd rb/(ra + rb) is true, as a result, the output of comparator is reversed from "h" to "l", then the output voltage is equal to the gnd level. 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. output delay time
r3111x 16 ? operation of r3111xxxxc vref ra rb rc v dd out gnd tr.1 nch pch com p arato r block diagram (r3111xxxxc) t plh gnd gnd v ddl - v det +v det detector threshold released voltage minimum operating voltage 12 3 4 5 a b detector threshold hysteresis supply voltage (v dd ) output voltage (v out ) step 1 2 3 4 5 comparator (+) pin input voltage i ii ii ii i comparator output h l indefinite l h tr.1 off on indefinite on off pch on off indefinite off on output tr. nch off on indefinite on off i v dd rb + rc ra + rb + rc ii v dd rb ra + rb operation diagram ? explanation of operation step 1. the output voltage is equal to the supply voltage (v dd ). step 2. at point ?a?, vref > = v dd (rb + rc)/(ra + rb + rc) is true, as a result, 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, t he operation of the output transistor becomes indefinite. step 4. the output voltage is equal to the gnd level. step 5. at point ?b?, vref < = v dd rb/(ra + rb) is true, as a result, the output of comparator is reversed from "l" to "h", then the output voltage is equal to the supply voltage (v dd ). 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. output delay time
r3111x 17 test circuits gnd v dd v in i ss r3111x series out gnd v dd v in r3111x series out 470k 5v v out supply current test circuit detector threshold test circuit (pull-up circuit is not necessary for cmos output type.) gnd v dd v in r3111x series out v ds i out gnd v dd v in r3111x series out v dd ? nch driver output current test circuit pch driver output current test circuit ? apply to cmos output type only gnd v dd r3111x series out v ds v out 5v r out 470k p. g. +v det +2.0v 0.7v gnd c out gnd v dd r3111x series out v ds v out 5v r out 470k p. g. +v det +2.0v 0.7v gnd r in 470k c in output delay time test circuit (1) output delay time test circuit (2) (pull-up circuit is not necessary for cmos output type.)
r3111x 18 typical characteristics 1) supply current vs. input voltage r3111x09xx r3111x27xx topt=85 c 25 c -40 c 2.5 2.0 1.5 1.0 0.5 0.0 input voltage v in (v) 0246810 supply current i ss ( a) topt=85 c 25 c -40 c 2.0 1.5 1.0 0.5 0.0 input voltage v in (v) 0246810 supply current i ss ( a) r3111x45xx topt=85 c 25 c -40 c 2.0 1.5 1.0 0.5 0.0 input voltage v in (v) 0246810 supply current i ss ( a) 2) detector threshold hysteresis vs. temperature r3111x09xx r3111x27xx +v det -v det 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.84 0.86 temperature topt( c) -60 0 20406080 -40 -20 100 detector threshold -v det (v) 2.9 2.8 2.7 2.6 2.5 +v det -v det temperature topt( c) -60 0 20406080 -40 -20 100 detector threshold -v det (v)
r3111x 19 r3111x45xx 4.8 4.7 4.6 4.5 4.4 +v det -v det temperature topt( c) -60 0 20406080 -40 -20 100 detector threshold -v det (v) 3) output voltage vs. input voltage r3111x09xc r3111x09xa topt=-40 c 25 c 85 c 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.0 0.2 input voltage v in (v) 0 0.6 0.8 1 1.2 1.4 0.2 0.4 1.6 output voltage v out (v) 5v pull-up 470k 6 5 4 3 2 0 1 input voltage v in (v) 0 0.6 0.8 1 1.2 1.4 0.2 0.4 1.6 output voltage v out (v) topt=-40 c 25 c 85 c r3111x27xc r3111x27xa topt=-40 c 25 c 85 c 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.0 0.5 input voltage v in (v) 0 1.5 2 2.5 3 3.5 0.5 1 4 output voltage v out (v) 5v pull-up 470k 6 5 4 3 2 0 1 input voltage v in (v) 0 1.5 2 2.5 3 3.5 0.5 1 4 output voltage v out (v) topt=-40 c 25 c 85 c
r3111x 20 r3111x45xc r3111x45xa topt=-40 c 25 c 85 c 6 5 4 3 2 0 1 input voltage v in (v) 023 16 5 4 output voltage v out (v) 5v pull-up 470k 6 5 4 3 2 0 1 input voltage v in (v) 023 16 5 4 output voltage v out (v) topt=-40 c 25 c 85 c 4) nch driver output current vs. v ds r3111x09xx r3111x09xx topt=25 c v dd =0.85v 0.7v 700 600 500 400 300 200 0 100 v ds (v) 0 0.2 0.4 0.6 0.8 output current i out ( a) v dd =0.8v 0.7v topt=25 c 300 250 200 150 100 0 50 v ds (v) 0 0.02 0.04 0.06 0.08 0.1 output current i out ( a) r3111x27xx r3111x27xx topt=25 c v dd =2.5v 2.0v 1.5v 20 18 14 16 12 10 8 6 4 0 2 v ds (v) 0 0.5 1 1.5 2 2.5 output current i out (ma) v dd =0.8v 0.7v topt=25 c 300 250 200 150 100 0 50 v ds (v) 0 0.02 0.04 0.06 0.08 0.1 output current i out ( a)
r3111x 21 r3111x45xx r3111x45xx topt=25 c v dd =4.5v 4.0v 3.5v 3.0v 2.5v 2.0v 1.5v 60 50 40 30 20 0 10 v ds (v) 0 0.5 1 1.5 2 2.5 3 4 3.5 4.5 output current i out (ma) v dd =0.8v 0.7v topt=25 c 300 250 200 150 100 0 50 v ds (v) 0 0.02 0.04 0.06 0.08 0.1 output current i out ( a) 5) nch driver output current vs. input voltage r3111x09xx r3111x27xx 900 800 700 600 500 400 300 200 0 100 input voltage v in (v) 0 0.2 0.4 0.6 1 0.8 output current i out ( a) topt=-85 c 25 c -40 c 14 12 10 8 6 4 0 2 input voltage v in (v) 0 0.5 1 1.5 1 2.5 3 output current i out (ma) topt=-40 c 25 c 85 c r3111x45xx 25 20 15 10 5 0 input voltage v in (v) 0123456 output current i out (ma) topt=-40 c 25 c 85 c
r3111x 22 6) pch driver output current vs. input voltage r3111x09xc r3111x27xc topt=25 c v ds =0.7v 0.5v 1.4 1.2 1.0 0.8 0.6 0.4 0.0 0.2 input voltage v in (v) 02468 output current i out (ma) topt=25 c v ds =2.1v 1.5v 0.5v 1.0v 3.5 3.0 2.5 2.0 1.5 1.0 0.0 0.5 input voltage v in (v) 012 4 36 57 output current i out (ma) r3111x45xc topt=25 c v ds =2.1v 1.5v 0.5v 1.0v 4.5 3.5 4.0 3.0 2.5 2.0 1.5 1.0 0.0 0.5 input voltage v in (v) 024 8 610 output current i out (ma) 7) output delay time vs. load capacitance (topt = 25 c) r3111x09xa r3111x27xa tplh tphl 100 10 1 0.1 0.01 0.001 load capacitance c out ( f) 0.0001 0.01 0.001 0.1 output delay time tp(ms) tplh tphl 100 10 1 0.1 0.01 0.001 load capacitance c out ( f) 0.0001 0.01 0.001 0.1 output delay time tp(ms)
r3111x 23 r3111x45xa t plh t phl 100 10 1 0.1 0.01 0.001 load capacitance c out ( f) 0.0001 0.01 0.001 0.1 output delay time tp(ms) 8) output delay time vs. input pin capacitance r3111x09xa r3111x27xa t phl t plh 100 10 1 0.1 0.01 0.001 input pin capacitance c in ( f) 0.0001 0.01 0.001 0.1 output delay time tp(ms) t plh t phl 100 10 1 0.1 0.01 0.001 input pin capacitance c in ( f) 0.0001 0.01 0.001 0.1 output delay time tp(ms) r3111x45xa t plh t phl 100 10 1 0.1 0.01 0.001 input pin capacitance c in ( f) 0.001 0.1 0.01 1 output delay time tp(ms)
r3111x 24 typical application ? r3111xxxxa cpu reset circuit (nch open drain output) case 1. input voltage to r3111xxxxa is equal to input voltage to cpu case 2. input voltage to r3111xxxxa is unequal to input voltage to cpu r3111xxxxa series v dd gnd out r v dd reset cpu gnd v dd 470k r3111xxxxa series v dd gnd out r v dd reset cpu gnd v dd2 v dd 470k ? r3111xxxxc cpu reset circuit (cmos output) r3111xxxxc series v dd gnd out v dd reset cpu gnd v dd ? r3111xxxxa output delay time circuit 1 (nch open drain output) ? r3111xxxxa output delay time circuit 2 (nch open drain output) r3111xxxxa series v dd gnd out r v dd reset cpu gnd v dd 470k r3111xxxxa series v dd gnd out r2 v dd reset cpu gnd v dd 470 k r1 100k ? memory back-up circuit r3111xxxxc series gnd v dd d1 d2 v dd gnd out a b c y1 y2 y3 y4 v cc v cc ram1 gnd cs v cc ram2 gnd cs v cc ram3 gnd cs v cc ram4 gnd cs
r3111x 25 ? voltage level indicator circuit (lighted when the power runs out) (nch open drain output) r3111xxxxa series v dd gnd out v dd ? detector threshold adjustable circuit (nch open drain output) r3111xxxxa series gnd v dd rb v dd c ra out + adjusted detector threshold = ( ? v det ) (ra + rb)/rb hysteresis voltage = (v hys ) (ra + rb)/rb ? ) if the value of ra is se t excessively large, voltage drop may occur caused by the supply current of ic itself, and detector threshold may vary. ? window comparator circuit (nch open drain output) r3111xxxxa series v dd gnd out v dd r3111xxxxa series v dd gnd out ? v det 1 wc_ou t ? v det 2 v dd ? v det 1 gnd wc_out ? v det 2 gnd ? over-charge preventing circuit r3111xxxxc series v dd gnd out r4 r2 r1 r3 light solar battery d1 load
r3111x 26 technical notes when r3111xxxxa/b (nch open drain ou tput type) is used in figure a or figure b, if impedance of voltage supply pin, v dd and v dd of this ic is large, detector threshold level would shift by voltage dropdown caused by the consumption current of the ic itself. released voltage may also shift and delay time for start-up might be generated by this usage. when r3111xxxxc (cmos output type) is used in figur e a or figure b, output level could be unstable by cross conduction current which is generated at detector thre shold level or at released voltage level, therefore, do not use this ic with the connection in figure a or figure b. the connection in figure c may caus e the oscillation in both r3111xxxxc (cmos output) and r3111xxxxa/b (nch open drain output), therefore do not use r3 111x series with the connection in figure c. gnd v dd r3111x series out r2 r3111x series out gnd gnd v dd r3111x series out r2 r1 v dd r1 v dd r1 v dd figure a figure b figure c
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- 5 % & m f d u s p o j d % f w j d f t $ p n q b o z ricoh presented with the japan management quality award for 1999 . ricoh continually strives to promote customer satisfaction, and shares the achievements of its management quality improvement program with people and society. ricoh awarded iso 14001 certification. the ricoh group was awarded iso 14001 certification, which is an international standard for environmental management systems, at both its domestic and overseas production facilities. our current aim is to obtain iso 14001 certification for all of our business offices. ricoh completed the organization of the lead-free production for all of our products. after apr. 1, 2006, we will ship out the lead free products only. thus, all products that will be shipped from now on comply with rohs directive.
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