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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- 5 % & m f d u s p o j d % f w j d f t $ p n q b o z ricoh presented with the japan management quality award for 1999 . ricoh continually strives to promote customer satisfaction, and shares the achievements of its management quality improvement program with people and society. ricoh awarded iso 14001 certification. the ricoh group was awarded iso 14001 certification, which is an international standard for environmental management systems, at both its domestic and overseas production facilities. our current aim is to obtain iso 14001 certification for all of our business offices. ricoh completed the organization of the lead-free production for all of our products. after apr. 1, 2006, we will ship out the lead free products only. thus, all products that will be shipped from now on comply with rohs directive.
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