mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 system reset (with battery back-up) monolithic ic mm1026, 1245, 1080 ,1134 outline these ics protect s-ram data in back-up mode (cs signal makes r-sam ce pin low and c e ------------------------------------------- pin high) when power supply voltage goes below a certain set voltage (detection voltage 3.5v, 4.2v or 4.5v typ.). further, it switches from main power supply to battery back-up when power supply voltage drops. conversely, when power supply rises, it first switches the s-ram from battery back-up to main power supply (switching voltage 3.3v typ.), then from back-up mode to normal mode (cs signal makes s-ram ce pin high and ce pin low). these signal processes provide reliable protection against data damage. features mm1026 power supply switching circuit (switching between main power supply and battery) cs control for s-ram (normal mode : s-ram can be accessed; back-up mode: s-ram can not be accessed low current consumption mode) reset output mm1245 power supply switching circuit cs control for s-ram cs control signal delay, power supply line chattering removal approx. 1s max. supply current from main power supply can be increased by external power transistor mm1080 power supply switching circuit cs control for s-ram low current consumption 60? typ. mm1134 power supply switching circuit cs control for s-ram gate circuit with cs signal characteristics 1. battery back-up 1. low ic current consumption (loss current) 0.3? typ. 2. drop voltage inside ic (input/output voltage difference) i o =100? 0.3v typ. 3. reverse current (reverse leak current) 0.1? max. 2. normal operation 1. drop voltage inside ic (input/output voltage difference) i o =50? 0.2v typ. 2. output voltage v cc =5v i o =50ma 4.8v typ. 3. battery-v cc switching voltage 3.3v typ. 4. detection voltage (cs, c s --------------------------------------------------------- , reset output) a : 3.5v typ. b : 4.2v typ. c : 4.5v typ. products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 package dip-8b (mm d) sop-8c (mm f) * contains detection voltage rank. applications 1. memory cards (s-ram cards) 2. pcs, word processors 3. fax machines, photocopiers, other office equipment 4. sequence controllers, other fa equipment 5. video games and other equipment with s-rams pin no. pin name mm1026 mm1245 mm1080 mm1134 1 gnd gnd gnd gnd 2 reset t c nc reset 3 cs cs cs cs 4 v batt v batt v batt v batt 5 cs cs nc cs 6 v out v out v out v out 7 nc tr.b nc y 8 v cc v cc v cc v cc pin assignment 14 32 85 67 dip-8p(c)/sop-8p(c)/sop-8p(c) taping (top view) block diagram mm1026 products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 mm1080 mm1134 mm1245 products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 equivalent circuit diagram mm1026 mm1245 products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 absolute maximum ratings (ta=25 c) item symbol rating units storage temperature t stg - 40~+125 c operating temperature t opr - 20~+75 c power supply voltage v cc max. 7 v operating voltage v ccop 7v allowable loss pd 300 mw mm1245 output current mm1026 i o 1 80 ma mm1134 mm1080 50 ma output current i o 2 200 ? note : i o 1 expresses v cc output current value, and i o 2 expresses v batt output current value. mm1080 mm1134 products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 electrical characteristics (except where noted otherwise, ta=25 c, v cc =v rs =5v, r rs =10k?) item symbol measurement conditions min. typ. max. units mm1026 2.0 ma consumption mm1245 i cc v cc =5v, v batt =3v, i o 1=0ma 0.6 1.0 1.4 ma current mm1080 60 120 ? mm1134 1.4 2.2 ma i/o voltage difference 1 v sat 1v cc =5v, v batt =3v, i o 1=1ma 0.03 0.05 v output voltage 1 v o 1v cc =5v, v batt =3v, i o 1=1ma 4.95 4.97 v i/o voltage difference 2 mm1245 v sat 2v cc =5v, v batt =3v, i o 1=30ma 0.15 0.30 v mm1026 output voltage 2 mm1134 v o 2 v cc =5v, v batt =3v, i o 1=15ma 4.75 4.90 v mm1080 v cc =5v, v batt =3v, i o 1=30ma 4.5 4.7 v i/o voltage difference 3 mm1245 v sat 3v cc =5v, v batt =3v, i o 1=80ma 0.30 0.50 output voltage 3 except mm1245 v o 3v cc =5v, v batt =3v, i o 1=50ma 4.7 4.8 v a type 3.35 3.50 3.65 v detection voltage b type v s v cc =h l 4.05 4.20 4.35 v c type 4.30 4.50 4.70 v hysteresis voltage v s v cc =l h 100 mv maximum base driving current mm1245 i buf v cc =5v, v buf =4.5v 14 20 26 ma reset output voltage l mm1026 v rsl v cc =3v 0.2 0.4 v reset leakage current h mm1134 i rsh v cc =5v, v rs =7.0v ?.01 ?.1 ? reset operation limit voltage v opl v rsl < = 0.4v, v cc =h l 0.8 1.2 v cs output voltage l v csl v cc =3.7v, v batt =3v, i cs =1? 0.1 v cs output voltage h v csh v cc =5v, v batt =3v, i cs = - 1? 4.90 v cs ----------------------------------------------------- output voltage l v csl v cc =5v, v batt =3v, i cs =1? 0.1 v cs ----------------------------------------------------- output voltage h v csh v cc =3.7v, v batt =3v, i cs = - 1? v o - 0.1 v detection voltage temperature characteristic v s / t ?.05 %/ c on delay time mm1245 td on ctc=open 50 ? off delay time td off ctc=open 5 ? t c pin charge current mm1245 i tc v cc =5v, v batt =3v, v tc =0v 0.60 0.80 1.10 ? cs source current i cssou v cc =5v, v batt =3v, v cs =4.5v 25 50 80 ? power supply switching voltage v b v cc =h l 3.15 3.30 3.45 v hysteresis voltage v b v cc =l h 100 mv switching voltage temperature characteristic v b / t ?.05 %/ c loss current i bl v cc =0v, v batt =3v, i o 2=0? 0.1 ? i/o voltage difference 2 vsat2 v cc =0v, v batt =3v, i o 2=1? 0.2 0.3 v output voltage 4 v 0 4v cc =0v, v batt =3v, i o 2=1? 2.7 2.8 v output voltage 5 v 0 5v cc =0v, v batt =3v, i o 2=100? 2.6 2.7 v reverse current i orev v cc =5v, v batt =0v 0.1 ? y ---------------------------------------------- pin l o h mm1080 (cs only) mm1026 mm1245 mm1134 note : detection voltage ranks a, b mm1026 b mm1134, mm1080 b, c mm1245 products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 timing chart v cc reset cs v out cs 0v 0v 0v 0v v s v b v opl v e v s v rsl v csh v csl v csh v o1,o2,o3 v rsh v csl v o4,o5 v cc t c cs v out cs v e v s v s v b v opl v th v csl v csl v o1,o2,o3 v csl v o4,o5 v csl set inside ic delay v cc v s v b battery cs v out v s v csl v csl v o1,o2 v o3,o4 v e 0v 0v 0v 0v 2.8v 4.8v v cc y cs v out cs v e v s v s v b v opl v csl v csl * v y v o1,o2,o3 v o4,o5 v csl v rsl v csl 0v 0v 0v 0v 0v reset mm1026 mm1245 mm1080 mm1134 characteristics (mm1026, mm1134 series) v out (v) 3.000 0.100/div 2.000 i out (ma) 0 1.000 0.100/div v out (v) (v) 5.000 .0500/div 4.500 i out (ma) .0000 - 100.0 10.00/div v out -i out (v cc =5.0v) v out -i out (v bat =3.0v) * use y -------------------------------------------- pin input voltage at less than 5v when v cc < = vs. products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 i bat (na) 40.00 5.000/div - 10.00 0 v cc (v) 0 10.00 1.000/div v cc -i bat i cc (ma) 5.000 .5000/div .0000 .0000 v cc (v) 10.00 1.000/div v cc -i cc 2.0 1.0 0.0 - 50 0 50 100 current consumption (ma) ambient temperature ( c) current consumption-temperature characteristics i ol =50ma i ol =10ma 0.3 0.2 0.1 - 50 0 50 100 output voltage 1, 2 (v) ambient temperature ( c) output voltage 1, 2-temperature characteristics i ol =100 a i ol =1 a - 50 0 50 100 0.2 0.1 0 0.5 0.4 0.3 output voltage 3, 4 (v) ambient temperature ( c) output voltage 3, 4-temperature 10na 100na 1 a - 80 - 50 0 50 100 reverse current ambient temperature ( c) reverse current-temperature 10na 100na 1 a - 80 - 50 0 50 100 loss current ambient temperature ( c) loss current-temperature products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 5.000 0.5000 0.0000 .0000 /div v out (v) 100.0 i out 10.00/div (ma) current consumption-temperature (vcc=5v) 100.0 10.00 .0000 .0000 5.000 /div i in (a) v in .5000/div (v) v in -i in 5.000 .0000 .0000 /div v out (v) .5000 200.0 i out 20.00/div ( a) v out -i out (v bat -3.0v) 1.000 .2000 - 1.000 .0000 /div i batt ( a) 5.000 v in .5000/div (v) 0 v in -i batt - 25 0 25 50 75 temp ( c) ( a) 80 70 60 50 current consumption-temperature (v cc =5v) hysteresis voltage (v) 3.3 3.2 3.1 3.0 - 250 255075 temp ( c) 50 100 150 (mv) hysteresis voltage vbat detection voltage v bat detection voltage-temperature hysteresis voltage (v) 4.5 4.0 3.5 - 25 0 25 50 75 temp ( c) 100 150 (mv) hysteresis voltage cs detection voltage cs detection voltage-temperature characteristics (mm1080 series) products to be discontinued
mitsumi system reset (with battery back-up) mm1026, 1245, 1080, 1134 5.00 4.90 4.80 4.70 4.60 4.50 4.40 4.30 4.20 4.10 4.00 5 25456585105125 v out i out (ma) i out -v out 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 - 250 255075 temperature ( c) v out -cs 47k? cs open current consumption (ma) current consumption-temperature 4.4 4.35 4.3 4.25 4.2 4.15 4.1 - 25 0 25 50 75 voltage (v) temperature ( c) cs detection voltage-temperature off delay time 10 1 100m 10m 1m 100 10 1 1 0.1 0.01 0.001 100p10p use 1s max. for cs-cs pin on delay time. delay time (s) capacitance (f) on delay time cs-cs pin on/off delay time vs. capacitance tc 3.5 3.45 3.4 3.35 3.3 3.25 3.2 - 25 0 25 50 75 voltage (v) temperature ( c) v bat detection voltage-temperature characteristics (mm1245 series) products to be discontinued
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