SLFS022I –SEPTEMBER 1973–REVISED SEPTEMBER …

1 1 SRR1 TRIGTHRESVCCCONTRESETOUTDISCHGND 48562173 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityNA555,NE555,SA555,SE555 SLFS022I SEPTEMBER1973 REVISEDSEPTEMBER2014xx555 PrecisionTimers1 Features3 DescriptionThesedevicesare precisiontimingcircuitscapableof1 TimingFromMicrosecondsto Hoursproducingaccuratetimedelaysor the Astableor MonostableOperationtime-delayor mono-stablemodeof operation,the AdjustableDutyCycletimedintervalis controlledby a singleexternalresistorand the a-stablemode TTL-CompatibleOutputCan Sinkor Sourceof operation,the frequencyand dutycyclecan beUp to 200 mAcontrolledindependentlywithtwo externalresistors On ProductsCompliantto MIL-PRF-38535,and a ParametersAre TestedUnlessOtherwiseThethresholdandtrig gerlevelsnormallyare All OtherProducts,Productionthirdsandone-thi rd,respectively,of VCC. TheseProcessingDoesNot NecessarilyIncludelevelscan be alteredby use of the control-voltageTestingof All triggerinputfalls belowthe triggerlevel,the flip-flopis set, and the Applicationsthe triggerinputis abovethe triggerleveland the FingerprintBiometricsthresholdinputis abovethe thresholdlevel,the flip-flop is resetand the outputis low.

2 The reset(RESET) Iris Biometricsinputcan overrideall otherinputsand can be usedto RFIDR eaderinitiatea ,the flip-flopis reset,and the outputgoeslow. Whenthe outputis low, a low-impedancepathis providedbetweendischarge(DISCH)and outputcircuitis capableof sinkingor sourcingcurrentup to specifiedforsuppliesof 5 V to 15 V. Witha 5-V supply,outputlevelsare compatiblewith TTL (1)PARTNUMBERPACKAGEBODYSIZE(NOM)PDIP(8) (8) (8) (8) (1) For all availablepackages,see the orderableaddendumatthe end of the SimplifiedSchematic1An IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand ,NE555,SA555,SE555 SLFS022I SEPTEMBER1973 Applicationsand Pin Configurationand Deviceand Mechanical,Packaging,and Orderable8 RevisionHistoryChangesfromRevisionH (June2010)to RevisionIPage Updateddocumentto new TI AddedMilitaryDisclaimerto Featureslist.

3 1 MovedTstgto AddedDeviceand AddedMechanical,Packaging,and 1973 2014,TexasInstrumentsIncorporatedProduct FolderLinks:NA555NE555SA555SE55512348765 GNDTRIGOUTRESETVCCDISCHTHRESCONT3 2 1 20 199 10 11 12 13456781817161514 NCDISCHNCTHRESNCNCTRIGNCOUTNCNCGNDNCCONT NCVCCNCNCRESETNCNC No internal OR P , P, PS, OR PW OR P , JG, OR P PACKAGE(TOP VIEW) PACKAGE(TOP VIEW)NA555,NE555,SA555, SEPTEMBER1973 REVISEDSEPTEMBER20146 Pin Configurationand FunctionsPin FunctionsPIND, P, PS,FKI/ODESCRIPTIONPW, ,Outputs2/3 VCC,allowsbypasscapacitorCONT512I/Oconne ctionDISCH717 OOpencollectoroutputto dischargetimingcapacitorGND12 Ground1, 3, 4, 6, 8,9, 11, 13,NC No internalconnection14, 16, 18,19 OUT37 OHighcurrenttimeroutputsignalRESET410 IActivelow resetinputforcesoutputand of > CONT sets outputlow and dischargelowTRIG25 IStartof < CONT sets outputhigh and dischargeopenVCC820 Inputsupplyvoltage, V to 16 V. (SE555maximumis 18 V)Copyright 1973 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks:NA555NE555SA555SE555N A555,NE555,SA555,SE555 SLFS022I SEPTEMBER1973 (1)overoperatingfree-airtemperaturerange (unlessotherwisenoted)MINMAXUNITVCCS upplyvoltage(2)18 VVII nputvoltageCONT,RESET,THRES,TRIGVCCVIOO utputcurrent 225mAD package97P package85 JAPackagethermalimpedance(3)(4) C/WPS package95PW package149FK JCPackagethermalimpedance(5)(6) C/WJG CCasetemperaturefor 60 sFK package260 CLeadtemperature1,6 mm (1/16in) fromcasefor 60 sJG package300 C(1)StressesbeyondthoselistedunderAbsolu teMaximumRatingsmay causepermanentdamageto the stressratingsonly,and functionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditionsis not absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.

4 (2)All voltagevaluesare with respectto GND.(3)Maximumpowerdissipationis a functionof TJ(max), JA, and TA. The maximumallowablepowerdissipationat any allowableambienttemperatureis PD= (TJ(max)- TA) / the absolutemaximumTJof 150 C can affectreliability.(4)The packagethermalimpedanceis calculatedin accordancewith JESD51-7.(5)Maximumpowerdissipationis a functionof TJ(max), JC, and TC. The maximumallowablepowerdissipationat any allowablecasetemperatureis PD= (TJ(max)- TC) / JC. Operatingat the absolutemaximumTJof 150 C can affectreliability.(6)The packagethermalimpedanceis calculatedin accordancewith 65150 (unlessotherwisenoted)MINMAXUNITNA555,NE 555, ,RESET,THRES,and TRIGVCCVIOO utputcurrent 200mANA555 40105NE555070 TAOperatingfree-airtemperature CSA555 4085SE555 551254 SubmitDocumentationFeedbackCopyright 1973 2014,TexasInstrumentsIncorporatedProduct FolderLinks:NA555NE555SA555SE555NA555,NE 555,SA555, SEPTEMBER1973 5 V to 15 V, TA= 25 C (unlessotherwisenoted)NA555SE555NE555 PARAMETERTESTCONDITIONSUNITSA555 MINTYPMAXMINTYPMAXVCC= 15 5 (1) 15 VTA= 55 C to 125 5 VTA= 55 C to 125 0 55 C to 125 0 V 1 5 V, IO= 8 15 VTA= 55 C to 125 (opencircuit) 5 VTA= 55 C to 125 15 V, IOL= 10 mATA= 55 C to 125 15 V, IOL= 50 mATA= 55 C to 125 15 V, IOL= 100 mALow-leveloutputvoltageTA= 55 C to 125 15 V, IOL= 200 5 V, IOL= mATA= 55 C to 125 5 V, IOL= 5 mATA= 55 C to 125 5 V, IOL= 8 15 V, IOH= 100 mATA= 55 C to 125 C12 High-leveloutputvoltageVCC= 15 V, IOH= 200 5 V, IOH= 100 mATA= 55 C to 125 C2 VCC= 15 V10121015 Outputlow, No loadVCC= 5 V3536 SupplycurrentmAVCC= 15 V910913 Outputhigh,No loadVCC= 5 V2425(1)This parameterinfluencesthe maximumvalueof the timingresistorsRAand RBin the circuitof Figure12.

5 For example,whenVCC= 5 V, the maximumvalueis R = RA+ RB M , and for VCC= 15 V, the maximumvalueis 10 M .Copyright 1973 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks:NA555NE555SA555SE555N A555,NE555,SA555,SE555 SLFS022I SEPTEMBER1973 5 V to 15 V, TA= 25 C (unlessotherwisenoted)NA555SE555NE555 TESTPARAMETERUNITSA555 CONDITIONS(1)MINTYPMAXMINTYPMAXE achtimer,monostable(3)TA= 25 (4)13 Initialerrorof timing%interval(2)Eachtimer,astable(5) ,monostable(3)TA= MIN to MAX30100(4)50 Temperaturecoefficientofppm/timinginterv al CEachtimer,astable(5)90150 Eachtimer,monostable(3)TA= 25 (4) ,astable(5) 15 pF,Output-pulserise time100200(4)100300nsTA= 25 CCL= 15 pF,Output-pulsefall time100200(4)100300nsTA= 25 C(1)For conditionsshownas MIN or MAX,use the appropriatevaluespecifiedunderrecommende doperatingconditions.(2)Timingintervaler roris definedas the differencebetweenthe measuredvalueand the averagevalueof a randomsamplefromeachprocessrun.

6 (3)Valuesspecifiedare for a devicein a monostablecircuitsimilarto Figure9, with the followingcomponentvalues:RA= 2 k to 100 k ,C = F.(4)On productscompliantto MIL-PRF-38535,this parameteris not productiontested.(5)Valuesspecifiedare for a devicein an astablecircuitsimilarto Figure12, with the followingcomponentvalues:RA= 1 k to 100 k ,C = 1973 2014,TexasInstrumentsIncorporatedProduct FolderLinks:NA555NE555SA555SE55554210935 67891011 Supply Current mA7681012131415TA= 25 CTA= 125 CTA= 55 COutput Low,No LoadCCIVCC Supply Voltage Duration Relative to Value at = 10 VVCC Supply Voltage V8TA= 125 CTA= 25 CTA= 55 CVCC= 15 V Low-Level Output Voltage VVOLIOL Low-Level Output Current 10204070 IOH High-Level Output Current mATA= 125 CTA= 25 C100704020107421 VCC= 5 V to 15 VTA= 55 CVCCVOH Voltage Drop V)(TA= 125 CTA= 25 CIOL Low-Level Output Current mAVCC= 5 VTA= 55 Low-Level Output Voltage VVOLVCC= 10 V Low-Level Output Voltage VVOLIOL Low-Level Output Current 125 CTA= 25 CTA= 55 CNA555,NE555,SA555, SEPTEMBER1973 temperaturesbelow 40 C and above105 C are applicablefor Low-LevelOutputVoltageFigure2.

7 Low-LevelOutputVoltagevs Low-LevelOutputCurrentvs Low-LevelOutputCurrentFigure3. Low-LevelOutputVoltageFigure4. DropBetweenSupplyVoltageand Outputvs Low-LevelOutputCurrentvs High-LevelOutputCurrentFigure5. SupplyCurrentFigure6. NormalizedOutputPulseDurationvs SupplyVoltage(MonostableOperation)vs SupplyVoltageCopyright 1973 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ProductFolderLinks:NA555NE555SA555SE5550 10020030040050060070080090010000 Level of Trigger Pulse VCCtPD Propagation Delay Time nsTA= 125 C TA= 70 C TA= 25 C TA= 0 C TA= 55 C 75 Free-Air Temperature C 50050100 VCC= 10 VPulse Duration Relative to Value at TA= 25C8NA555,NE555,SA555,SE555 SLFS022I SEPTEMBER1973 (continued)Datafor temperaturesbelow 40 C and above105 C are applicablefor NormalizedOutputPulseDurationFigure8. PropagationDelayTime(MonostableOperation )vsvsLowestVoltageLevelof TriggerPulseFree-AirTemperature8 SubmitDocumentationFeedbackCopyright 1973 2014,TexasInstrumentsIncorporatedProduct FolderLinks:NA555NE555SA555SE5551 SRR1 TRIGTHRESVCCCONTRESETOUTDISCHGND 48562173NA555,NE555,SA555, SEPTEMBER1973 REVISEDSEPTEMBER20148 xx555timeris a popularand easyto use for generalpurposetimingapplicationsfrom10 s to hoursor from< 1mHzto 100 the time-delayor mono-stablemodeof operation,the timedintervalis controlledby asingleexternalresistorand the a-stablemodeof operation,the frequencyand dutycyclecan be controlledindependentlywith two externalresistorsand a dischargesink currentis greaterfor higherVCCand less for numbersshownare for the D, JG, P, PS, and PW overrideTRIG,whichcan mono-stableoperation,any of thesetimerscan be connectedas shownin Figure9.

8 If the outputis low,applicationof a negative-goingpulseto the trigger(TRIG)sets the flip-flop(Q goeslow),drivesthe outputhigh,and turnsoff Q1. CapacitorC thenis chargedthroughRAuntilthe voltageacrossthe capacitorreachesthethresholdvoltageof the threshold(THRES) TRIGhas returnedto a high level,the outputof the thresholdcomparatorresetsthe flip-flop(Q goeshigh),drivesthe outputlow, and dischargesC 1973 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback9 ProductFolderLinks:NA555NE555SA555SE555 Voltage 2 V/divTime ms/div Capacitor VoltageOutput VoltageInput Voltage RA = k CL = FRL = 1 k See Figure 9 Output Pulse Duration sC Capacitance F10110 110 210 310 = 10 M RA = 10 k RA = 1 k RA = 100 k RA = 1 M VCC(5 V to 15 V)RARLO utputGNDOUTVCCCONTRESETDISCHTHRESTRIGI nput 58476231 Pin numbers shown are for the D, JG, P, PS, and PW ,NE555,SA555,SE555 SLFS022I SEPTEMBER1973 (continued)Figure9.

9 Circuitfor MonostableOperationMonostableoperationis initiatedwhenTRIG voltagefallsbelowthe ,thesequenceendsonly if TRIGis highfor at least10 s beforethe end of the triggerisgrounded,the comparatorstoragetimecan be as longas 10 s, whichlimitsthe minimummonostablepulsewidthto 10 s. Becauseof the thresholdleveland saturationvoltageof Q1, the outputpulsedurationisapproximatelytw= Figure11 is a plot of the time constantfor variousvaluesof RAand C. The thresholdlevelsand chargeratesbothare directlyproportionalto the supplyvoltage,VCC. The timingintervalis, therefore,independentof the supplyvoltage,so long as the supplyvoltageis constantduringthe time negative-goingtriggerpulsesimultaneously to RESETand TRIG duringthe timingintervaldischargesC and reinitiatesthe cycle,commencingon the positiveedgeof the outputis heldlow as longas the resetpulseis low. To preventfalsetriggering,whenRESETis not used,it shouldbe connectedto TypicalMonostableWaveformsFigure11.

10 OutputPulseDurationvs Capacitance10 SubmitDocumentationFeedbackCopyright 1973 2014,TexasInstrumentsIncorporatedProduct FolderLinks:NA555NE555SA555SE555 LBHABtRLow-to-high ratiotRR==+HBHLABtROutput waveform duty cycle1t tR 2R== -++LBHLABtROutput driver duty cyclettR2R= =++() 2R C +() R2RC=+=+( ) R C=() RR C=+ FVCC(5 V to 15 V)(see Note A) NOTE A:Decoupling CONT voltage to ground with a capacitor canimprove operation. This should be evaluated for numbers shown are for the D, JG, P, PS, and PW 1 V/divTime ms/divtHCapacitor VoltageOutput VoltagetL RA = 5 kW RL = 1 kWRB = 3 kW See Figure 12C = FNA555,NE555,SA555, SEPTEMBER1973 REVISEDSEPTEMBER2014 FeatureDescription(continued) shownin Figure12, addinga secondresistor,RB, to the circuitof Figure9 and connectingthe triggerinputtothe thresholdinputcausesthe timerto self-triggerand run as a capacitorC chargesthroughRAand RBand ,the dutycycleis controlledby the valuesof capacitorC chargingand dischargingbetweenthe threshold-voltagelevel( VCC) and the trigger-voltagelevel( VCC).