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r3112x series low voltage detector with output delay no. ea-087-090422 1 outline the r3112x 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, resistor net for detector threshold setting, an output driver, a hysteresis circuit, and an output delay circuit. the detector threshold is fixed with high accuracy internally and does not require any adjustm ent. two output types, nch open drain type and cmos type are available. three types of packages, sot-23-5, small sc-82ab, sc-88a and ultra-small son1612-6 can be selected so that high density mounting on boards is possible. features ? built-in output delay circ uit............................................... typ. 100m s with an external capacitor: 0.022 f ? supply current ................................................................... typ. 0.5 a (r3112x271a/c, v dd = 2.6v) ? operating voltage .............................................................. 0.7 to 6.0v(topt = 25 c) ? detector threshold............................................................. 0.9v to 5.0v ? high accuracy detect or threshold .................................... 2.0% ? low temperature-drift coefficient of detector threshold ... typ. 100ppm/ c ? two output ty pes .............................................................. nch open drain and cmos ? packages ........................................................................... sot-23-5(mini- mold),sc-82ab, sc-88a, son1612-6 applications ? cpu and logic circuit reset ? battery checker ? window comparator ? wave shaping circuit ? battery back-up circuit ? power failure detector
r3112x 2 block diagrams r3112xxx1a r3112xxx1c gnd v dd - + vref out r d c d gnd v dd - + vref out r d c d selection guide the package type, the detector thre shold, the output type, and the tapi ng type of r3112x series can be designated at the users? request by specifying the part number as follows; r3112xxx xx -xx -x part number a b c d e f code contents a designation of package type; r3112dxx1x: son1612-6 r3112nxx1x: sot-23-5 r3112qxx1x: sc-82ab r3112qxx2x: sc-88a b setting detector threshold ( ? v det ); stepwise setting with a step of 0.1v in the range of 0.9v to 5.0v is possible. c designation of package type 1: except sc-88a 2: sc-88a d designation of output type; a: nch open drain c: cmos e designation of packing or taping type; ex. sot-23-5, sc-82ab, sc-88a, son1 612-6: tr is prescribed as standard directions. (refer to taping specifications) designation of composition of pin plating; -f: lead free plating (sot-23-5, sc-82ab, sc-88a, son1612-6)
r3112x 3 pin configuration sot-23-5 sc-82ab sc-88a son1612-6 1 2 3 4 5 (mark side) 4 3 1 2 (mark side) 54 1 3 2 (mark side) 1 2 3 6 5 4 pin description ? sot-23-5 ? sc-82ab pin no. symbol description pin no. symbol description 1 out output pin (output ?l? at detector threshold, output ?h? at released voltage) 1 v dd voltage supply pin 2 v dd voltage supply pin 2 gnd ground pin 3 gnd ground pin 3 c d pin for external capacitor (for setting output delay) 4 nc no connection 4 out output pin (output ?l? at detector threshold, output ?h? at released voltage) 5 c d pin for external capacitor (for setting output delay) ? sc-88a ? son1612-6 pin no. symbol description pin no. symbol description 1 v dd voltage supply pin 1 out output pin (output ?l? at detector threshold, output ?h? at released voltage) 2 nc no connection 2 gnd ground pin 3 gnd ground pin 3 c d pin for external capacitor (for setting output delay) 4 c d pin for external capacitor (for setting output delay) 4 nc no connection 5 out output pin (output ?l? at detector threshold, output ?h? at released voltage) 5 gnd ground pin 6 v dd voltage supply pin
r3112x 4 absolute maximum ratings symbol item rating unit v dd supply voltage 6.5 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 6.5 v i out output current 20 ma power dissipation (sot-23-5)* 420 power dissipation (sc-82ab)* 380 power dissipation (sc-88a)* 380 p d power dissipation (son1612-6)* 500 mw t opt operating temperature range ? 40 to 85 c t stg storage temperature range ? 55 to 125 c t solder 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.
r3112x 5 electrical characteristics ? r3112x091a/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 v dd = 0.80v 0.6 2.0 i ss supply current v dd = 1.90v 0.5 2.0 a v ddh maximum operating voltage 6.0 v t opt = 25 c 0.70 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.80 v 10 120 a nch v ds = 0.05v, v dd = 0.70v v ds = 0.50v, v dd = 0.85v 0.05 0.90 ma i out output current (driver output pin) pch v ds =? 2.1v, v dd = 4.5v 1.0 3.5 ma v tcd cd pin threshold voltage v dd = 0.99v 0.297 0.495 0.693 v v ds = 0.10v, v dd = 0.70v 2 70 i cd cd pin output current v ds = 0.50v, v dd = 0.85v 10 400 a r d output delay resistance 3.25 6.50 13.00 m ? v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c 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.
r3112x 6 ? r3112x271a/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 0.189 v v dd = 2.60v 1.0 3.0 i ss supply current v dd = 3.70v 0.5 2.5 a v ddh maximum operating voltage 6.0 v t opt = 25 c 0.7 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.8 v nch v ds = 0.05v,v dd = 0.70v 10 120 a v ds = 0.50v,v dd = 1.50v 1.0 3.0 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 4.5v 1.0 3.5 ma v tcd cd pin threshold voltage v dd = 2.97v 0.891 1.485 2.079 v v ds = 0.1v,v dd = 0.7v 2 70 a i cd cd pin output current v ds = 0.5v,v dd = 1.5v 200 500 r d output delay resistance 3.25 6.50 13.00 m ? v det / topt detector threshold temperature coefficient ? 40 c < = < = c 100 ppm/ c
r3112x 7 ? r3112x501a/c topt = 25 c symbol item conditions min. typ. max. unit ? v det detector threshold 4.900 5.000 5.100 v v hys detector threshold hysteresis 0.150 0.250 0.350 v v dd = 4.9v 1.5 3.0 i ss supply current v dd = 6.0v 0.6 2.5 a v ddh maximum operating voltage 6.0 v t opt = 25 c 0.7 v ddl minimum operating voltage ? note1 ? 40 c < = < = c 0.8 v nch v ds = 0.05v,v dd = 0.70v 10 120 a v ds = 0.50v,v dd = 1.50v 1.0 3.0 ma i out output current (driver output pin) pch v ds =? 2.1v,v dd = 6.0v 1.5 4.5 ma v tcd cd pin threshold voltage v dd = 5.50v 1.650 2.750 3.850 v v ds = 0.1v, v dd = 0.7v 2 70 i cd cd pin output current v ds = 0.5v, v dd = 1.5v 200 500 a r d output delay resistance 3.25 6.50 13.00 m ? 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 dr ain type, output pin is pulled up with a resistance of 470k to 5.0v.)
r3112x 8 electrical characteristics by detector threshold detector threshold hysteresis range supply current 1 supply current 2 output current 1 output current 2 product code ? v det [v] v hys [v] i ss 1[ a] i ss 2[ a] i out 1[ma] i out 2[ma] min. typ. max. min. typ. max. condi- tions typ. max. condi- tions typ. max. condi- tions min. typ. conditions min. typ. r3112x091a/c 0.882 0. 900 0.918 0.027 0.045 0.063 r3112x101a/c 0.980 1. 000 1.020 0.030 0.050 0.070 0.6 2.0 0.05 0.9 r3112x111a/c 1.078 1. 100 1.122 0.033 0.055 0.077 r3112x121a/c 1.176 1. 200 1.224 0.036 0.060 0.084 r3112x131a/c 1.274 1. 300 1.326 0.039 0.065 0.091 r3112x141a/c 1.372 1. 400 1.428 0.042 0.070 0.098 r3112x151a/c 1.470 1. 500 1.530 0.045 0.075 0.105 0.7 2.5 0.5 2.0 v ds = 0.5v v dd = 0.85v 0.2 1.8 r3112x161a/c 1.568 1. 600 1.632 0.048 0.080 0.112 r3112x171a/c 1.666 1. 700 1.734 0.051 0.085 0.119 r3112x181a/c 1.764 1. 800 1.836 0.054 0.090 0.126 r3112x191a/c 1.862 1. 900 1.938 0.057 0.095 0.133 r3112x201a/c 1.960 2. 000 2.040 0.060 0.100 0.140 r3112x211a/c 2.058 2. 100 2.142 0.063 0.105 0.147 r3112x221a/c 2.156 2. 200 2.244 0.066 0.110 0.154 r3112x231a/c 2.254 2. 300 2.346 0.069 0.115 0.161 r3112x241a/c 2.352 2. 400 2.448 0.072 0.120 0.168 r3112x251a/c 2.450 2. 500 2.550 0.075 0.125 0.175 r3112x261a/c 2.548 2. 600 2.652 0.078 0.130 0.182 r3112x271a/c 2.646 2. 700 2.754 0.081 0.135 0.189 r3112x281a/c 2.744 2. 800 2.856 0.084 0.140 0.196 r3112x291a/c 2.842 2. 900 2.958 0.087 0.145 0.203 r3112x301a/c 2.940 3. 000 3.060 0.090 0.150 0.210 1.0 3.0 0.5 2.5 r3112x311a/c 3.038 3. 100 3.162 0.093 0.155 0.217 r3112x321a/c 3.136 3. 200 3.264 0.096 0.160 0.224 r3112x331a/c 3.234 3. 300 3.366 0.099 0.165 0.231 r3112x341a/c 3.332 3. 400 3.468 0.102 0.170 0.238 r3112x351a/c 3.430 3. 500 3.570 0.105 0.175 0.245 r3112x361a/c 3.528 3. 600 3.672 0.108 0.180 0.252 r3112x371a/c 3.626 3. 700 3.774 0.111 0.185 0.259 r3112x381a/c 3.724 3. 800 3.876 0.114 0.190 0.266 r3112x391a/c 3.822 3. 900 3.978 0.117 0.195 0.273 r3112x401a/c 3.920 4. 000 4.080 0.120 0.200 0.280 1.2 3.0 0.6 2.5 r3112x411a/c 4.018 4. 100 4.182 0.123 0.205 0.287 r3112x421a/c 4.116 4. 200 4.284 0.126 0.210 0.294 r3112x431a/c 4.214 4. 300 4.386 0.129 0.215 0.301 r3112x441a/c 4.312 4. 400 4.488 0.132 0.220 0.308 r3112x451a/c 4.410 4. 500 4.590 0.135 0.225 0.315 r3112x461a/c 4.508 4. 600 4.692 0.138 0.230 0.322 r3112x471a/c 4.606 4. 700 4.794 0.141 0.235 0.329 r3112x481a/c 4.704 4. 800 4.896 0.144 0.240 0.336 r3112x491a/c 4.802 4. 900 4.998 0.147 0.245 0.343 r3112x501a/c 4.900 5. 000 5.100 0.150 0.250 0.350 v dd = ? v det ? 0.1v 1.5 3.0 v dd = ? v det + 0.1v 0.6 2.5 v ds = 0.05v v dd = 0.7v 0.01 0.12 nch v ds = 0.5v v dd = 1.5v 1.0 3.0
r3112x 9 output current 3 minimum operating voltage cd pin threshold voltage cd pin output current 1 cd pin output current 2 resistance for output delay detector threshold temperature i out 3[ma] v ddl [v] v tcd [v] i cd 1[ a] i cd 2[ a] r d [m ] ? v det / topt [ppm/ c] condition min. typ. condi- tion max. condi- tion max. condi- tion min. typ. max. condi- tion min. typ. condi- tion min. typ. min. typ. max. condi- tion typ. 0.297 0.495 0.693 0.330 0.550 0.770 v ds = 0.5v v dd = 0.85v 10 400 0.363 0.605 0.847 0.396 0.660 0.924 0.429 0.715 1.001 0.462 0.770 1.078 0.495 0.825 1.155 v ds = 0.5v v dd = 0.85v 50 450 0.528 0.880 1.232 0.561 0.935 1.309 0.594 0.990 1.386 0.627 1.045 1.463 0.660 1.100 1.540 0.693 1.155 1.617 0.726 1.210 1.694 0.759 1.265 1.771 0.792 1.320 1.848 0.825 1.375 1.925 0.858 1.430 2.002 0.891 1.485 2.079 0.924 1.540 2.156 0.957 1.595 2.233 0.990 1.650 2.310 1.023 1.705 2.387 1.056 1.760 2.464 1.089 1.815 2.541 1.122 1.870 2.618 1.155 1.925 2.695 1.188 1.980 2.772 1.221 2.035 2.849 1.254 2.090 2.926 v ds = ? 21v v dd = 4.5v 1.5 3.5 1.287 2.145 3.003 1.320 2.200 3.080 1.353 2.255 3.157 1.386 2.310 3.234 1.419 2.365 3.311 1.452 2.420 3.388 1.485 2.475 3.465 1.518 2.530 3.542 1.551 2.585 3.619 1.584 2.640 3.696 1.617 2.695 3.773 pch v ds = ? 2.1v v dd = 6.0v 2.0 4.5 topt = 25 c 0.7 ? 40 c < = topt < = 85 c 0.8 v dd = (v det ) 1.1v 1.650 2.750 3.850 v ds = 0.1v v dd = 0.7v 20 70 v ds = 0.5v v dd = 1.5v 200 500 3.25 6.5 13.0 ? 40 c < = < = c 100
r3112x 10 operation v dd pch rc tr.1 tr.2 rb ra nch r d o ut c d gnd + - vref schmitt trigger comparator current source output capacitor fig. 1 block diagram with an external capacitor hysteresis range 1 gnd gnd delay time a b output voltage(out) supply voltage(v dd ) v ddl -v det +v det minimum operating voltge detector threshold released voltage 23 45 operation status compartor(-) pin input voltage compartor output tr.1, 2 1 i i v dd l off rb+rc ra+rb+rc off on output tr. nch pch 2 ii h on on off 4 ii h on on off 5 i l off off on 3 ii indefinite indefinite indefinite indefinite ii v dd rb ra+rb fig. 2 operation diagram 1. output voltage is equal to supply voltage. (as for nch open drain type, equal to pull-up voltage.) 2. when the supply voltage is down to the detector threshold voltage level(point a), vref > = v dd ( rb + rc)/(ra + rb + rc) is true, then output of the comparator is reversed from ?l? to ?h?, therefore output voltage becomes gnd level. 3. when the supply voltage is lower than minimum opera ting voltage, the operation of output transistor is indefinite. in the case of nch open drain ty pe, output voltage is equal to pull-up voltage. 4. output voltage becomes gnd level. 5. when the supply voltage is higher than released voltage (point b), vref < = rb/(ra + rb) is true, then output of the comparator r eaches the threshold level, and output of shmitt trigger is reversed from ?h? to ?l?, then output voltage is equal to supply voltage. (as for nch open drain type, equal to pull-up voltage.) ? ) the difference between released voltage and detector threshold voltage means hysteresis range voltage.
r3112x 11 ? operation of output delay gnd gnd released voltage (+v det ) c d pin threshold voltage (v tcd ) output delay time(t d ) output voltage capacitor voltage supply voltage when the supply voltage which is higher than released voltage is forced to v dd pin, charge to an external capacitor starts, then capacitor voltage increases. until the capacitor voltage reaches to c d pin threshold voltage, output voltage maintains ?l?. when the capacitor voltage becomes higher than c d pin threshold voltage, output voltage is reversed from "l? to "h". where, the time in terval between the rising edge of supply voltage and output voltage reverse point means output delay time. ? output delay time output delay time (t d ) can be calculated with the next formula. t d = 0.69 r d c d (s) r d is internal resistor and set at 6.5m (typ.) typically. c d (f) describes the capacita nce value of an external capacitor. therefore, t d = 0.69 6.5 10 6 c d (s)
r3112x 12 test circuits ? pull-up circuit is not necessary for cmos output type, or r3112xxxxc. r3112x v dd v in i ss gnd r3112x v dd out +5v or v dd 470k v in gnd supply current test circuit detector threshold test circuit v dd out v in v ds gnd i out r3112x v dd out v in v dd +v ds gnd i out r3112x nch driver output current test circuit pch driver output current test circuit ? apply only to cmos v dd c d out +5v or v dd 470k v in gnd v ds r3112x v dd c d v in gnd v ds i cd r3112x cd pin threshold test circuit cd pin output current test circuit +v det +2.0 or 0.6v input voltage output voltage 0.7v gnd 100% 50% gnd r3112x v dd c d o ut +5v 470k v in gnd c d output delay time test circuit
r3112x 13 typical characteristics 1) supply current vs. input voltage r3112x091x r3112x131x 1.5 1.2 0.9 0.6 0.3 0 input voltage v in (v) supply current i ss ( a) 01234567 topt=85 c -40 c 25 c 1.5 1.2 0.9 0.6 0.3 0 input voltage v in (v) supply current i ss ( a) 01234567 topt=85 c -40 c 25 c r3112x271x r3112x451x 1.5 1.2 0.9 0.6 0.3 0 input voltage v in (v) supply current i ss ( a) 01234567 topt=85 c -40 c 25 c 2.0 1.6 1.2 0.8 0.4 0 input voltage v in (v) supply current i ss ( a) 01234567 topt=85 c -40 c 25 c 2) detector threshold vs. temperature r3112x091x r3112x131x 0.98 0.88 0.86 temperature topt( c) detector threshold/released voltage v det (v) -50 -25 75 100 0 25 50 0.90 0.92 0.94 0.96 +v det -v det 1.42 1.28 1.26 temperature topt( c) detector threshold/released voltage v det (v) -50 -25 75 100 0 25 50 1.30 1.32 1.34 1.36 1.38 1.40 +v det -v det
r3112x 14 r3112x271x r3112x451x 2.90 2.65 2.60 temperature topt( c) detector threshold/released voltage v det (v) -50 -25 75 100 0 25 50 2.70 2.75 2.80 2.85 +v det -v det 4.75 4.40 4.35 temperature topt( c) detector threshold/released voltage v det (v) -50 -25 75 100 0 25 50 4.45 4.50 4.55 4.60 4.65 4.70 +v det -v det 3) output voltage vs. input voltage r3112x091x r3112x091a 1.0 0.8 0.6 0.4 0.2 0.0 input voltage v in (v) output voltage v out (v) 0 0.2 0.8 1 0.4 0.6 nch output type: v dd pull up topt=-40 c 25 c 85 c 6.0 5.0 4.0 3.0 2.0 0.0 input voltage v in (v) output voltage v out (v) 0 0.2 0.8 1 0.4 0.6 1.0 5v pull up via 470k topt=-40 c 25 c 85 c r3112x131x r3112x131a 1.5 1.2 0.9 0.6 0.3 0 input voltage v in (v) output voltage v out (v) 0 0.3 1.2 1.5 0.6 0.9 nch output type: v dd pull up topt=-40 c 25 c 85 c 6.0 5.0 4.0 3.0 2.0 0.0 input voltage v in (v) output voltage v out (v) 0 0.3 1.2 1.5 0.6 0.9 1.0 5v pull up via 470k topt=-40 c 25 c 85 c
r3112x 15 r3112x271x r3112x271a 3.0 2.5 2.0 1.5 1.0 0.5 0.0 input voltage v in (v) output voltage v out (v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 nch output type: v dd pull up topt=-40 c 25 c 85 c 6.0 5.0 4.0 3.0 2.0 1.0 0.0 input voltage v in (v) output voltage v out (v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 5v pull up via 470k topt=-40 c 25 c 85 c r3112x451x r3112x451a 5.0 4.5 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0.0 input voltage v in (v) output voltage v out (v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 nch output type: v dd pull up topt=-40 c 25 c 85 c 6.0 5.0 4.0 3.0 2.0 1.0 0.0 input voltage v in (v) output voltage v out (v) 0.0 0.5 1.0 2.0 3.5 4.0 5.0 2.5 3.0 1.5 4.5 5v pull up via 470k topt=-40 c 25 c 85 c 4) nch driver output current vs. v ds r3112x091x r3112x131x 1.2 1.0 0.6 0.4 0.2 0 v ds (v) output current i out (ma) 0 0.2 0.4 0.6 0.8 1 0.8 topt=25 c v dd =0.85 v 0.7v 2.5 2.0 1.5 1.0 0.5 0 v ds (v) output current i out (ma) 0 0.2 0.4 0.6 0.8 1 topt=25 c v dd =1.0 v 0.85v 0.7v
r3112x 16 r3112x271x r3112x451x 20 16 12 8 4 0 v ds (v) output current i out (ma) 0 0.5 1 1.5 2 2.5 topt=25 c v dd =2.5 v 1.0v 1.5v 2.0v 20 16 12 8 4 0 v ds (v) output current i out (ma) 0 0.5 1.5 3 3.5 4 2 1 2.5 topt=25 c v dd =2.5 v v dd =3.0 v v dd =4.0 v v dd =3.5 v 1.0v 1.5v 2.0v 5) nch driver output current vs. input voltage r3112x091x r3112x131x 2.0 1.5 1.0 0.5 0.0 input voltage v in (v) output current i out (ma) 0 0.2 0.4 0.6 0.8 1 topt=25 c -40 c 85 c 5 4 2 1 0 input voltage v in (v) output current i out (ma) 0 0.3 0.6 0.9 1.2 1.5 3 topt=-40 c 85 c 25 c r3112x271x r3112x451x 5 4 0 input voltage v in (v) output current i out (ma) 0 0.5 3 1 1.5 2 2.5 3 2 1 topt=-40 c 85 c 25 c 5 4 0 input voltage v in (v) output current i out (ma) 01 2345 3 2 1 topt=-40 c 85 c 25 c
r3112x 17 6) pch driver output current vs. input voltage r3112x091c r3112x131c 6 1 0 input voltage v in (v) output current i out (ma) 01 4 67 5 3 2 2 3 4 5 topt=25 c v ds =-2.1 v -0.5v -1.0v -1.5v 6 1 0 input voltage v in (v) output current i out (ma) 01 4 67 5 3 2 2 3 4 5 topt=25 c v ds =-2.1 v -0.5v -1.0v -1.5v r3112x271c r3112x451c 6 1 0 input voltage v in (v) output current i out (ma) 01 4 67 5 3 2 2 3 4 5 topt=25 c v ds =-2.1 v -0.5v -1.0v -1.5v 6 1 0 input voltage v in (v) output current i out (ma) 01 4 67 5 3 2 2 3 4 5 topt=25 c v ds =-2.1 v -0.5v -1.0v -1.5v 7) cd pin threshold voltage vs. temperature r3112x091x r3112x131x 0.8 0.3 0.2 temperature topt( c) c d pin threshold voltage v tcd (v) -50 -25 75 100 0 25 50 0.4 0.5 0.6 0.7 v dd =0.99v 1.0 0.5 0.4 temperature topt( c) c d pin threshold voltage v tcd (v) -50 -25 75 100 0 25 50 0.6 0.7 0.8 0.9 v dd =1.43v
r3112x 18 r3112x271x r3112x451x 1.9 1.4 1.3 temperature topt( c) c d pin threshold voltage v tcd (v) -50 -25 75 100 0 25 50 1.5 1.6 1.7 1.8 v dd =2.97v 2.9 2.4 2.3 temperature topt( c) c d pin threshold voltage v tcd (v) -50 -25 75 100 0 25 50 2.5 2.6 2.7 2.8 v dd =4.95v 8) cd pin output current vs. input voltage r3112x091x r3112x131x 1.0 0.8 0.4 0.2 0 input voltage v in (v) c d pin output current i cd (ma) 0 0.2 0.4 0.6 0.8 1 0.6 v ds =0.5v topt=-40 c 85 c 25 c 1.0 0.8 0.4 0.2 0 input voltage v in (v) c d pin output current i cd (ma) 0 0.3 0.6 0.9 1.2 1.5 0.6 v ds =0.5v topt=-40 c 85 c 25 c r3112x271x r3112x451x 1.0 0.8 0.4 0.2 0 input voltage v in (v) c d pin output current i cd (ma) 0 0.5 1 2.5 23 1.5 0.6 v ds =0.5v topt=-40 c 85 c 25 c 1.0 0.8 0.4 0.2 0 input voltage v in (v) c d pin output current i cd (ma) 012 4 35 0.6 v ds =0.5v topt=-40 c 85 c 25 c
r3112x 19 9) cd pin output current vs. v ds (topt = 25 c) r3112x091x r3112x131x 0.7 0.6 0.3 0.2 0.1 0 v ds (v) c d pin output current i cd (ma) 0 0.2 0.4 0.6 0.8 1 0.4 0.5 topt=25 c v dd =0.85 v 0.7v 1.0 0.7 0.3 0.2 0.1 0 v ds (v) c d pin output current i cd (ma) 0 0.2 0.4 0.6 0.8 1 0.6 0.8 0.9 0.4 0.5 topt=25 c v dd =1.0 v 0.85v 0.7v r3112x271x r3112x451x 3.0 2.0 1.0 0.5 0 v ds (v) c d pin output current i cd (ma) 0 0.5 1 1.5 2 2.5 2.5 1.5 topt=25 c v dd =2.5 v 1.0v 1.5v 2.0v 4.5 2.0 1.0 0.5 0 v ds (v) c d pin output current i cd (ma) 0 0.5 1.5 2.5 3.5 4 1 2 3 2.5 3.0 3.5 4.0 1.5 topt=25 c v dd =4.0 v 1.0v 2.0v 1.5v 2.5v 3.5v 3.0v 10) output delay time vs. external capacitance (topt = 25 c) r3112x091x r3112x131x 1000 0.01 external capacitance c d ( f) output deley time tx(ms) 0.0001 0.001 0.01 0.1 0.1 1 10 100 topt=25 c t phl t d 1000 0.01 external capacitance c d ( f) output delay tx(ms) 0.0001 0.001 0.01 0.1 0.1 1 10 100 topt=25 c t phl t d
r3112x 20 r3112x271x r3112x451x 1000 0.01 external capacitance c d ( f) output delay time tx(ms) 0.0001 0.001 0.01 0.1 0.1 1 10 100 topt=25 c t phl t d 1000 0.01 external capacitance c d ( f) output delay time tx(ms) 0.0001 0.001 0.01 0.1 0.1 1 10 100 topt=25 c t phl t d 11) delay circuit resistance vs. temperature r3112xxx1x 13 4 3 temperature topt( c) delay circuit resistance r d (m ) -50 -25 75 100 0 25 50 7 6 5 8 9 12 11 10
r3112x 21 technical notes v dd r v dd gnd out r3112x v dd r1 r2 v dd gnd out r3112x v dd r1 r2 v dd gnd out r3112x figure a figure b figure c when r3112xxx1a (nch open drain output type) is used in figure a or fi gure 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 r3112xxx1c (cmos output type) is used in figure a or figure b, output le vel could be unstable by cross conduction current which is generated at detector thre shold level or at released voltage level, therefore, do not use r3112xxx1c with the connect ion in figure a or figure b. the connection in figure c may ca use the oscillation in both r3112 xxx1c (cmos output) and r3112xxx1a (nch open drain output), therefore do not use r311 2xxx1x series with the connection in figure c.

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