lr8808 micropocessor reset circuits general description the lr8808 series are ultar-low current voltage detectors,which can be used to monitor the power supplies in microprocessor and digital systems. there are two output forms,and nch open-drain and cmos output are available. the lr8808 series are available sot23(-3 -5) package.performance is specified for -40 to +85 temperature range. features 0.95v to 8v input range reset threshold:1.5v 6.0v in 0.1v increments high-precision detection voltage: 2.0 % ultra-low current consumption: 1.0 a@3.5v(typ) sot23-3 sot23-5 package nmos open drain and cmos outpu t (active low ) 40 to +85 junction temperature range for operation applications battery-powered systems power supply monitoring handheld and portable equipment processor supervisor reset typical application circuit block diagram ( *1 : parasitic diode) 1/6 leshan radio company, ltd.
pin descriptions sot23 sot23-5 pin no a m r 1 gnd vout vout 2 vout gnd vcc 3 vcc vcc gnd 4 no connection 5 no connection connection diagrams sot23 package sot23-5 package ordering information the package type,the detector threshold,the output type and the taping type of lr8808 series can be designated at user?s reques t as following: code symbol description a 1.5~6.0 detect voltage c cmos output b n nch open drain output a/m package:sot23 c r package:sot23-5 absolute maximum ratings v in gnd to gnd +10v v out gnd to gnd +10v junction temperature ? 40c to +85c storage temperature ? 40c to +125c power dissipation sot23 250mw operating ratings v in 0.95v to 8v v out 0 to v in junction temperature ? 40c to +85c junction-to-ambient thermal resistance ( ja ) sot23 301 c /w sot23-5 220c /w 2/6 leshan radio company, ltd. lr8808
electrical characteristics unless otherwise specified,typical values and limits appearing in standard typeface are for t a = 25c. symbol item conditions min type max unit ? v det (figure1) detection voltage ? v det s 0.98 ? v det s ? v det s 1.02 v v hys (figure1) hysteresis width ? v det s 0.02 ? v det s 0.05 ? v det s 0.08 v lr8808 2.0 2.6 c/n 1.0 2.0 a lr8808 2.6 3.9 c/n 1.2 2.5 a iss current consumption v cc = ? v det + 0.5v lr8808 3.9 6.0 c/n 1.5 3.0 a vcc operating voltage 0.95 8 v lr8808 2.0 2.6 c/n 3.0 13.0 ma lr8808 2.6 3.9 c/n 3.0 15.0 ma nmos: v out =0.5v vcc= ? v det ? 0.5 lr8808 3.9 6.0 c/n 3.0 18.0 ma lr8808 2.0 2.6 c/n 1.5 4.0 ma lr8808 2.6 3.9 c/n 1.5 6.0 ma i out output current pmos: vcc ? v out =0.5v vcc= ? v det +0.5 lr8808 3.9 6.0 c/n 1.5 8.0 ma i leak leakage current only for nmos open-drain output products, v cc =8.0 v, v out =8.0 v 0.1 a temperature coefficient ta= ? 40c to +85c 120 360 ppm/ c t plh delay time 200 s figure1 3/6 leshan radio company, ltd. lr8808
making information dn159 lr8808-1.5 dn389 lr8808-3.8 dn169 lr8808-1.6 dn399 lr8808-3.9 dn179 lr8808-1.7 dn409 lr8808-4.0 dn189 lr8808-1.8 dn419 lr8808-4.1 dn199 lr8808-1.9 dn429 lr8808-4.2 dn209 lr8808-2.0 dn439 lr8808-4.3 dn219 lr8808-2.1 dn449 lr8808-4.4 dn229 lr8808-2.2 dn459 lr8808-4.5 dn239 lr8808-2.3 dn469 lr8808-4.6 dn249 lr8808-2.4 dn479 lr8808-4.7 dn259 lr8808-2.5 dn489 lr8808-4.8 dn269 lr8808-2.6 dn499 lr8808-4.9 dn279 lr8808-2.7 dn509 lr8808-5.0 dn289 lr8808-2.8 dn519 lr8808-5.1 dn299 lr8808-2.9 dn529 lr8808-5.2 dn309 lr8808-3.0 dn539 lr8808-5.3 dn319 lr8808-3.1 dn549 lr8808-5.4 dn329 lr8808-3.2 dn559 lr8808-5.5 dn339 lr8808-3.3 dn569 lr8808-5.6 dn349 lr8808-3.4 dn579 lr8808-5.7 dn359 lr8808-3.5 dn589 lr8808-5.8 dn369 lr8808-3.6 dn599 lr8808-5.9 dn379 lr8808-3.7 dn609 lr8808-6.0 4/6 leshan radio company, ltd. lr8808
physical dimensions 5/6 leshan radio company, ltd. lr8808
6/6 leshan radio company, ltd. lr8808
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