mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu ic for cmos system reset monolithic ic pst4x6mxxxn, pst4x6nxxxu series outline this system reset ic was developed using the cmos process. ultra-low current consumption of 0.5? typ. has been realized through use of the cmos process. also, the built-in fixed delay timer provides accurate reset by detecting power supply voltage during power on and power interruptions. features 1 detection voltage precision ?.5% 2 low current consumption 0.5? 3 hysteresis 6.3mv typ. (vth 3.08v) 9.5mv typ. (vth 3.08v) 4 external capacitor for delay timer not needed. built-in delay timer 185ms 5 full rank variations available for detection voltage, package and output configurations. 6 operating temperature range suitable for car devices -40~+105?c package sot-23 (pst4x6mxxxn series) sc-70 (pst4x6nxxxu series) applications 1. reset circuits in microcomputers, cpus and mpus. 2. logic circuit reset circuits. 3. battery voltage check 4. switching circuits for back-up circuits. 5. level detection circuits. 6. mechanical reset circuits pin assignment 12 3 sot-23a 1 gnd 2 reset reset 3 v dd 12 3 sc-70a pst4 m n pst4 n u 1 gnd 2 reset reset 3 v dd
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu block diagram pst416m n v dd reset reset generator gnd push-pull / active-low output type v dd reset reset generator gnd push-pull / active-high output type v dd reset reset generator gnd open-drain / active-low output type v dd reset reset generator gnd push-pull / active-low output type v dd reset reset generator gnd push-pull / active-high output type v dd reset reset generator gnd open-drain / active-low output type pst436m n pst426m n pst416n u pst436n u pst426n u
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu absolute maximum ratings pin explanations model name ab c output type v th rank housing 1 push-pull active-low 220? th =2.20v r : right housing 2 open-drain active-low 463? th =4.63v l : left housing 3 push-pull active-high pst4 6m n abc ~ ~ pst4 6n u abc ab c output type v th rank housing 1 push-pull active-low 220? th =2.20v r : right housing 2 open-drain active-low 463? th =4.63v l : left housing 3 push-pull active-high ~ ~ pin no. pin name function 1 gnd gnd pin 2 reset/reset reset signal output pin 3 v dd power supply pin/voltage detect pin item symbol rating unit operating temperature t opr -40~+85 c storage temperature t stg -60~+150 c supply voltage v dd max. -0.3~+6.0 v output voltage reset/reset - 0.3~ (vcc +0.3 ) ( push-pull type) v - 0.3~+6.0 (open drain type) input current (v dd ) i dd 20 ma output current i out 20 ma power dissipation p d 150 (alone) mw recommended operating conditions item symbol rating unit operating temperature t opr - 40 ~ +85 c supply voltage v dd 1.0 ~ 5.5 (ta=0 ~ +70 c) v 1.2 ~ 5.5 (ta=-40 ~ +85 c)
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu electrical characteristics (v dd =full range, ta=-40~+85?, ta=+25?, v dd =3v.) note : * 1 this device is tested at ta=25 ?c, over temperature limits guaranteed by design only. note : * 2 the parameter is guaranteed by design. item symbo test conditions min. typ. max. unit circuit v th < = 3.08v only, v dd =3.0v for v th > 2.93v - 0.5 1.0 supply current i dd v dd =3.2v for v th > 2.93, no load ? 2 v dd =5.5v, no load - 1.0 1.75 reset threshold v th ta=+25?c v th -1.5% v th v th +1.5% v1 ta= - 40~+85?c v th -2.5% v th v th +2.5% reset threshold temp. coefficient v th /?c - 30 - ppm/?c 1 v dd to reset delay t rd v dd =v th ~(v th - 100mv) * 2 - 20 - ? 5 reset active timeout period t rp 100 185 280 ms 5 reset output voltage v ol i sink =1.6ma, v dd > 2.1v -- 0.3 v4 (pst416m/pst426m, pst416n/pst426n) i sink =100?,v dd > = 1.2v -- 0.4 reset output voltage i source =500?, v dd =3.2v 0.8 v dd -- (pst416m, pst416n) v oh i source =800?, v dd =4.5v, v th < = 4.38v 0.8 v dd -- v3 i source =800?, v dd =v th max., v th > = 4.5v 0.8 v dd -- v oh i source =500?, v dd > = 2.1v 0.8 v dd -- v3 reset output voltage i source =50?, v dd > = 1.2v 0.8 v dd -- (pst436m, pst436n) i sink =1.2ma, v dd > = 3.2v -- 0.3 v ol i sink =3.2ma, v dd > = 4.5v, v th < = 4.38v -- 0.4 v 4 i sink =3.2ma, v dd =v th max., v th > = 4.5v -- 0.4 hysteresis voltage v th < = 3.08v - 6.3 - mv 1 v th > = 3.30v - 9.5 - output leakage current -- 0.1 ? - (pst426m, pst426n)
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu electrical characteristics reset threshold list reset threshold (v) reset threshold hysteresis (mv) ta=+25?c ta= - 40~+85?c ta= - 40~+85?c model min. typ. max. min. max. typ. pst4 m220n 2.167 2.200 2.233 2.145 2.250 pst4 m232n 2.285 2.320 2.355 2.262 2.375 pst4 m240n 2.364 2.400 2.436 2.340 2.460 pst4 m250n 2.462 2.500 2.537 2.437 2.562 pst4 m263n 2.591 2.630 2.669 2.564 2.696 6.3 pst4 m270n 2.660 2.700 2.741 2.633 2.768 pst4 m280n 2.758 2.800 2.842 2.730 2.870 pst4 m293n 2.886 2.930 2.974 2.857 3.000 pst4 m300n 2.955 3.000 3.045 2.925 3.075 pst4 m308n 3.034 3.080 3.126 3.003 3.150 pst4 m330n 3.250 3.300 3.350 3.217 3.383 pst4 m340n 3.349 3.400 3.451 3.315 3.485 pst4 m350n 3.447 3.500 3.552 3.412 3.587 pst4 m360n 3.546 3.600 3.654 3.510 3.690 pst4 m370n 3.644 3.700 3.755 3.607 3.792 pst4 m380n 3.743 3.800 3.857 3.705 3.895 pst4 m390n 3.841 3.900 3.958 3.802 3.997 9.5 pst4 m400n 3.940 4.000 4.060 3.900 4.100 pst4 m410n 4.038 4.100 4.161 3.997 4.202 pst4 m420n 4.137 4.200 4.263 4.095 4.305 pst4 m430n 4.235 4.300 4.364 4.192 4.407 pst4 m438n 4.314 4.380 4.446 4.270 4.489 pst4 m450n 4.432 4.500 4.567 4.387 4.612 pst4 m463n 4.560 4.630 4.699 4.514 4.746 pst4 m220n 2.167 2.200 2.233 2.145 2.250 pst4 m232n 2.285 2.320 2.355 2.262 2.375 pst4 m240n 2.364 2.400 2.436 2.340 2.460 pst4 m250n 2.462 2.500 2.537 2.437 2.562 pst4 m263n 2.591 2.630 2.669 2.564 2.696 6.3 pst4 m270n 2.660 2.700 2.741 2.633 2.768 pst4 m280n 2.758 2.800 2.842 2.730 2.870 pst4 m293n 2.886 2.930 2.974 2.857 3.000 pst4 m300n 2.955 3.000 3.045 2.925 3.075 pst4 m308n 3.034 3.080 3.126 3.003 3.150 pst4 m330n 3.250 3.300 3.350 3.217 3.383 pst4 m340n 3.349 3.400 3.451 3.315 3.485 pst4 m350n 3.447 3.500 3.552 3.412 3.587 pst4 m360n 3.546 3.600 3.654 3.510 3.690 pst4 m370n 3.644 3.700 3.755 3.607 3.792 pst4 m380n 3.743 3.800 3.857 3.705 3.895 pst4 m390n 3.841 3.900 3.958 3.802 3.997 9.5 pst4 m400n 3.940 4.000 4.060 3.900 4.100 pst4 m410n 4.038 4.100 4.161 3.997 4.202 pst4 m420n 4.137 4.200 4.263 4.095 4.305 pst4 m430n 4.235 4.300 4.364 4.192 4.407 pst4 m438n 4.314 4.380 4.446 4.270 4.489 pst4 m450n 4.432 4.500 4.567 4.387 4.612 pst4 m463n 4.560 4.630 4.699 4.514 4.746
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu measuring circuit (5) v in v dd 2 3 1 gnd reset/reset input voltage output voltage v th +1.0v v th 1.0v gnd gnd 100% pst416m /pst426m /pst416n /pst426n pst436m /pst436n pst436m /pst436n pst416m /pst426m /pst416n /pst426n 50% t rp reset active timeout period v dd to reset delay v th +1.0v v th - 0.1v v th gnd gnd 100% 50% t rd (1) v in v dd 2 3 1 gnd reset/reset (2) v dd 3 1 2 i dd v in gnd reset/reset (3) reset /reset i oh v oh 2 3 1 v dd gnd v in v (4) reset /reset i ol v ol 2 3 1 v dd gnd v in v
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu reset v v v dd v th t rp t rp v v v dd reset v th t rp t rp timing chart pst416m/pst426m, pst416n/pst426n active-low output type pst436m, pst436n active-high output type
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu application circuits v dd gnd 3 1 2 v in reset logic system v in please note that there is any possibility of circuit oscillation when resistance put in the line v in . we shall not be liable for any trouble or damage caused by using this circuit. in the event a problem which may affect industrial property or any other rights of us or a third party is encountered during the use of information described in these circuit, mitsumi shall not be liable for any such problem, nor grant a license therefore. v in v dd 1 3 2 gnd reset/reset
mitsumi ic for cmos system reset pst4x6mxxxn, pst4x6nxxxu characteristics supply current supply current vs temperature 0 012345 6 1.4 1.2 1.6 0.8 1.0 0.6 0.4 0.2 v dd (v) v th =2.20v v th =4.63v ta=2.5 c supply current ( a) 0.0 - 40 - 20 0 20 40 60 80 0.9 0.8 1.0 0.6 0.7 0.5 0.4 0.3 0.2 0.1 temperature ( c) v dd =5v v dd =3.3v v dd =1.2v supply current ( a) 0 - 40 - 20 0 20 40 60 80 80 100 60 40 20 temperature ( c) v dd =v in - v dd v th =3.08v v dd =10mv v dd =20mv v dd =100mv v dd =200mv power-down reset deray ( s) 0 - 40 - 20 0 20 40 60 80 120 140 100 80 60 40 20 temperature ( c) v dd =v th - v dd v dd =10mv v dd =20mv v dd =100mv v dd =200mv v th =4.63v power-down reset deray ( s) 0 - 40 - 20 0 20 40 60 80 220 210 230 200 190 180 170 160 temperature ( c) power-up reset timeout (mg) 0.997 - 40 - 20 0 20 40 60 80 1.002 1.003 1.001 1.000 0.999 0.998 temperature ( c) normalized threshold 0 11 0 100 1000 350 300 400 250 200 150 100 50 ta=2.5 c v th =4.63v v th =2.20v reset comparator overdrive, v th -v dd (mv) maximum transient duration ( s) power-up reset timeout vs temperature power-down reset timeout vs temperature power-down reset timeout vs temperature normalized threshold vs temperature maximum transient duration vs reset comparator overdrive
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