nju7702/03 -1- ver.2005-02-28 voltage detector general description package outline the nju7702/03 is a high precision and low quiescent current voltage detector. the detection voltage is internally fixed with an accuracy of 1.0%. the nju7702/03 are useful for preventing malfunction of microcomputer or dsp etc. through detect a drop in voltage of battery or power supply. nju7702 is nch. open drain and NJU7703 is a c-mos output type. small packaging makes nju7702 and NJU7703 suitable for space conscious applications. features high precision detection voltage 1.0% low quiescent current 0.8 a typ. (v det =3v version) detection voltage range 1.3 6.0v(0.1v step) output configuration nju7702: nch. open drain type NJU7703: c-mos output type cmos technology package outline sot-23-5 pin configuration nju7702/03f (*1): connect sub terminal to gnd. equivalent circuit nju7702 NJU7703 nju7702/03f 1. n c 2. sub (*1) 3. v ss 4. v out 5. v dd 1 2 3 4 5 v out vre f v dd v ss vre f v out v dd v ss
nju7702/03 - 2 - ver.2005-02-28 detection voltage rank list 3device name v det nju7702/03f13 1.3v nju7702/03f27 2.7v nju7702/03f28 2.8v nju7702/03f03 3.0v nju7702/03f31 3.1v nju7702/03f42 4.2v nju7702/03f06 6.0v nju7702 absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v dd +10 v output voltage v out v ss -0.3 +10 v output current i out 50 ma power dissipation p d 200(*2) mw operating temperature topr ? 40 +85 c storage temperature tstg ? 40 +125 c (*2) : device itself electrical characteristics (ta=25 c) parameter symbol test condition min. typ. max. unit detection voltage v det -1.0% ? +1.0% v hysteresis voltage v hys v det 0.03 v det 0.05 v det 0.08 v v det =1.3v 1.7v version ? 0.5 1.0 a quiescent current i ss v dd =v det +1v v det =1.8v 6.0v version ? 0.8 1.6 a v dd =1.2v 0.75 2.0 ? ma output current i out nch,v ds =0.5v v dd =2.4v ( 2.7v version) 4.5 7.0 ? ma output leak current i leak v dd =v out =9v ? ? 0.1 a detection voltag e temperature coefficient ? v det / ? ta ta = 0 +85 c ? 100 ? ppm/ c operating voltage (*3) v dd r l =100k ? 0.8 ? 9 v (*3): the minimum operating voltage(v opl ) indicates the same value of the input voltage(v dd ) on condition that v out becomes 10% or less of the input voltage(v dd ).
nju7702/03 - 3 - ver.2005-02-28 test circuit 1 commom test circuit 2 output current/output leak current test circuit a v v nju7702 i ss v dd v dd v out v ss /sub v det / v opl r l v out v dd nju7702 a v dd v out v ss /sub v ds / v out i out / i leak
nju7702/03 - 4 - ver.2005-02-28 typical application 1 in case of using one power supply. 2 in case of using two power supply. v ss nju7702 cpu micro processor etc. reset signal input v dd v out v ss /sub r l 100k ? v dd v ss nju7702 cpu micro processor etc. reset signal input v dd v out v ss /sub r l 100k ? v dd1 v dd2
nju7702/03 - 5 - ver.2005-02-28 NJU7703 absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v dd +10 v output voltage v out v ss -0.3 v dd +0.3 v output current i out 50 ma power dissipation p d 200(*4) mw operating temperature topr ? 40 +85 c storage temperature tstg ? 40 +125 c (*4) : device itself electrical characteristics (ta=25 c) parameter symbol test condition min. typ. max. unit detection voltage v det -1.0% ? +1.0% v hysteresis voltage v hys v det 0.03 v det 0.05 v det 0.08 v v det =1.3v 1.7v version ? 0.5 1.0 a quiescent current i ss v dd =v det +1v v det =1.8v 6.0v version ? 0.8 1.6 a v dd =1.2v 0.75 2.0 ? ma nch,v ds =0.5v v dd =2.4v ( 2.7v version) 4.5 7.0 ? ma v dd =4.8v ( 3.9v version) 2.0 3.5 ? ma v dd =6.0v (4.0v 5.6v version) 2.5 4.0 ? ma output current i out pch,v ds =0.5v v dd =8.4v ( 5.7v version) 3.0 5.0 ? ma detection voltage temperature coefficient ? v det / ? ta ta = 0 +85 c ? 100 ? ppm/ c operating voltage (*5) v dd r l =100k ? 0.8 ? 9 v (*5): the minimum operating voltage(v opl ) indicates the same value of the input voltage(v dd ) on condition that v out becomes 10% or less of the input voltage(v dd ).
nju7702/03 - 6 - ver.2005-02-28 test circuit 1 common test circuit 2 nch output current test circuit 3 pch output current test circuit a v v NJU7703 i ss v dd v dd v out v ss /sub v det v out NJU7703 a v dd v out v ss /sub v ds i out v dd NJU7703 a v dd v out v ss /sub v ds v dd i out
nju7702/03 -7- ver.2005-02-28 4 minumum operating voltage test circuit typical application v dd v v NJU7703 v dd v out v ss /sub v out v opl r l NJU7703 v ss v dd v dd v out v ss /sub cpu micro processor etc. reset signal input
nju7702/03 - 8 - ver.2005-02-28 functional description (1) basic operation (*8): c-mos output product (NJU7703) : when v dd less than v opl , v out is free of the shaded region. [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. (1) when supply voltage(v dd ) drops belo w detection voltage(v det ), output voltage(v out ) changes "h" to "l" to alert reset state. (2) the reset state is kept while v dd is lower than release voltage. the release voltage is a sum of v det and hysterisis voltage (v hys ). pleas e refer to the (*7) below. (3) when v dd becomes higher than the releas e voltage, then v out changes from "l" to "h" t o resume normal state. (*7) v hys is to avoid unstable v out state caused by rapid voltage change at nearby v det . detection voltage (v det ) release voltage (v det + v hys ) hysteresis voltage (v hys ) supply voltage (v dd ) output voltage (v out ) minimum operation voltage (v opl ) v ss v ss
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