ksi-2056-000 1 S72NXXUF standard volta g e detector 7 description the function of this low reset type ic is to accurately reset systems after detecting the supply voltage at the time of switching power on and instantaneous power off in various cpu and other logic system. further, this ic, with its super low consumption current is most suited as a vo ltage check circuit for a number of products which use batteries. features ? super low current consumption (i ccl = 1.0ua typ.) ? high current of output transistor (i ol =20ma typ.) ? hysteresis circuit built in ( v s =100mv typ.) ? it has on delay function to supplemen t the constant of outer c and r. applications ? reset circuits for microcomputers, cpu and mpu. ? reset circuit for logic circuitry. ? battery voltage check circuit. ? circuit for changing over to backup battery. ? level detecting circuit. ordering information type no. marking package code S72NXXUF n sot-323f : detecting voltage code outline dimensions s s e e m m i i c c o o n n d d u u c c t t o o r r pin connections 1. out 2. gnd 3. vcc 2.1 0.1 1.30 0.1 1.30 bsc 2.0 0.1 0.30~0.40 0.11 0.05 0~0.1 0.70 -0.15 +0.1 1 2 3
ksi-2056-000 2 S72NXXUF equivalent circuit diagram maximum ratings (ta=25 c) characteristic symbol ratings unit supply voltage vcc -0.3 ~ +10 v power dissipation (package limitation) pd * 200 mw operating temperature topr -20 ~ +75 storage temperature tstg -40 ~ +125 * with pcb(8 8 L copper area) at glass epoxy board (t=1.7 L , area; 20 20 L ) electrical characteristics (vcc=5v, ta=25 c) characteristic symbol test circuit test condition min. typ. max. unit detecting voltage vs 1 * see table 1 hysteresis voltage vs 1 rl=470 ? ,vcc=l h l 40 100 300 mv temperature coefficient of detecting voltage vs/ t 1 rl=470 ? , ta= -20~75 - 0.01 - %/ low level output voltage vol 1 rl=470 ? , vcc= vs min - 0.1 0.4 v circuit current at on iccl 1 rl= ? , vcc= vs min - 100 180 a circuit current at off icch 1 rl= ? ,vcc=vs max +0.1v - 1.0 2.5 a threshold operating voltage vopr 1 rl=4.7 ? , vol 0.4v - 1.4 1.6 v output current at on i iol 1 1 rl=0 ? , vcc= vs min 10 20 - ma output current at on ii iol 2 1 rl=0 ? , vcc= vs min , ta= -20~75 5 - - ma l h transmission delay time tplh 2 rl=4.7 ? , cl=100 ? - 100 500 ? h l transmission delay time tphl 2 rl=4.7 ? , cl=100 ? - 10 20 ? vcc out gnd
ksi-2056-000 3 S72NXXUF * table 1 electrical characteristics (vcc=5v, ta=25 c) characteristic symbol test circuit test condition min. typ. max. unit s72n45uf 4.30 4.5 4.70 s72n42uf 4.00 4.2 4.40 s72n39uf 3.70 3.9 4.10 s72n36uf 3.40 3.6 3.80 s72n33uf 3.10 3.3 3.50 s72n31uf 2.90 3.1 3.30 s72n29uf 2.75 2.9 3.05 s72n27uf 2.55 2.7 2.85 s72n25uf 2.35 2.5 2.65 detecting voltage vs 1 rl=470 ? vcc=h l vol 0.4v s72n23uf 2.15 2.3 2.45 v
ksi-2056-000 4 S72NXXUF (1) battery low indicator (2) cpu resetting test circuit 2 application circuit (note) (1) connecting of led and r2 obtains a voltage drop indicator. (2) connecting of c1 and selection of time constant with c1 and r1 set the power on delay time. test circuit 1
ksi-2056-000 5 S72NXXUF electrical characteristic curves fig. 4 v s ? t a fig. 6 v ol ? t a fig. 1 v o ? v cc fig. 2 i cc ? v cc fig. 3 v s ? t a fig. 5 i ccl ? t a
ksi-2056-000 6 S72NXXUF fig. 7 i ol ? t a fig. 8 i cch ? t a fig. 9 c l ? t plh
ksi-2056-000 7 S72NXXUF these auk products are intended for usage in general electronic equipments(office and communication equipment, measuring equipm ent, domestic electrification, etc.). please make sure that you consult with us before you use these auk products in equipm- ents which require high quality and/or reliabi lity, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, traffic signal, combustion central, all types of safety device, etc.). auk cannot accept liability to any damage which may occur in case these auk products were used in the mentioned equipments without prior consultation with auk.
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