rn5vd series low input vd with delay function no.ek-029-091101 cmos voltage detector the rn5vd series are cmos-based voltage detector ics with the built-in output delay circuit, which can operate at low voltage. the delay time can be set with an external capacitor. features ? supply current (i ss1 ) typ. 1 a (v dd =-v det +2v, rn5vd15x) ? operating voltage range (v dd ) 0.7v to 10.0v (topt=25 c) ? detector threshold range (-v det ) 0.9v to 6.0v ( internally fixed ) ? output delay typ. 100ms delay set with a 0.15 f external capacitor ? reset signal "l" ? detector threshold accuracy 2.5% ? temp. coeff. of detector threshold typ. 100ppm/ c ? two output types nch. open drain and cmos ? package sot-23-5 block diagrams rn5vdxxa rn5vdxxc (nch. open drain output) (cmos output) out v dd vref c d gnd r d out v dd vref c d gnd r d selection guide timing chart package quantity per reel part no. sot-23-5 3,000 pcs rn5vd . xx ? a-tr-f . xx . : specify the detector threshold within the range 0.9v ( . 09 . ) to 6.0v ( . 60 . ) in 0.1v steps. . ? : select the output type from ( . a . ) nch. open drain or ( . c . ) cmos. t d gnd gnd v ddl - v det +v det rn5vdxxa t d rn5vdxxc t phl t phl hysteresis detector th r eshold release voltage minimum operating voltage pull-up voltage supply voltage (v dd ) output voltage (v out ) hysteresis package (top view) how to determine delay time sot-23-5 1 3 5 4 2 1 out 2 v dd 3 gnd 4 nc 5 c d letting the capacity of an external capacitor c d (f), the delay time (t d ) is found from the following equation: t d =0.69 10 6 c d (s) applications ? microcontroller and logic circuit reset ? battery checker ? window comparator ? wave shaping circuit ? battery back-up circuit ? power failure detector
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