SE555D

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V CC NC NC RESET NC NC – No internal connection NA555...D OR P PACKAGE NE555...D, P, PS, OR PW PACKAGE SA555...D OR P PACKAGE SE555...D, JG, OR P PACKAGE (TOP VIEW) SE555...FK PACKAGE (TOP VIEW) NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 PRECISIONTIMERS Check forSamples: NA555 ,NE555 ,SA555 ,SE555 1FEATURES

• Timing From Microseconds toHours • AdjustableDuty Cycle
• Astableor Monostable Operation • TTL-CompatibleOutput Can Sink or Source up to200 mA DESCRIPTION/ORDERING INFORMATION These devicesare precisiontimingcircuitscapableof producingaccuratetime delaysor oscillation.In the time-delayor monostablemode of operation,the timedintervaliscontrolledby a singleexternalresistorand capacitornetwork.In the astablemode of operation,the frequencyand duty cycle can be controlled independentlywithtwo externalresistorsand a singleexternalcapacitor. The thresholdand triggerlevelsnormallyaretwo-thirdsand one-third,respectively,ofVCC .These levelscan be alteredby use ofthecontrol-voltageterminal.When thetriggerinputfallsbelow thetriggerlevel,theflip-flopis set,and theoutputgoes high.Ifthetriggerinputisabove thetriggerleveland thethresholdinputisabove the thresholdlevel,theflip-flopisresetand theoutputislow.The reset(RESET) inputcan overrideallotherinputs and can be used toinitiatea new timingcycle.When RESET goes low,theflip-flopisreset,and theoutputgoes low.When theoutputislow,a low-impedancepathisprovidedbetween discharge(DISCH) and ground. The outputcircuitiscapableofsinkingor sourcingcurrentup to200 mA. Operationisspecifiedforsuppliesof 5 V to15 V.Witha 5-V supply,outputlevelsarecompatiblewithTTL inputs. Pleasebe aware thatan importantnoticeconcerningavailability,standardwarranty,and use incriticalapplicationsofTexas Instrumentssemiconductorproductsand disclaimerstheretoappearsattheend ofthisdatasheet.

NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com ORDERING INFORMATION (1) VTHRES MAXTA PACKAGE (2) ORDERABLE PART NUMBER TOP-SIDE MARKINGVCC = 15 V PDIP – P Tube of50 NE555P NE555P Tube of75 NE555D SOIC – D NE555 Reelof2500 NE555DR 0°C to70°C 11.2V SOP – PS Reelof2000 NE555PSR N555 Tube of150 NE555PW TSSOP – PW N555 Reelof2000 NE555PWR PDIP – P Tube of50 SA555P SA555P –40°C to85°C 11.2V Tube of75 SA555D SOIC – D SA555 Reelof2000 SA555DR PDIP – P Tube of50 NA555P NA555P –40°C to105°C 11.2V Tube of75 NA555D SOIC – D NA555 Reelof2000 NA555DR PDIP – P Tube of50 SE555P SE555P Tube of75 SE555D SOIC – D SE555D –55°C to125°C 10.6 Reelof2500 SE555DR CDIP – JG Tube of50 SE555JG SE555JG LCCC – FK Tube of55 SE555FK SE555FK (1) Forthemost currentpackage and orderinginformation,see thePackage OptionAddendum attheend ofthisdocument,orsee theTI web siteatwww.ti.com. (2) Package drawings,thermaldata,and symbolizationareavailableatwww.ti.com/packaging. Table1.FUNCTION TABLE TRIGGER THRESHOLD DISCHARGERESET OUTPUTVOLTAGE (1) VOLTAGE (1) SWITCH Low Irrelevant Irrelevant Low On High <1/3VCC Irrelevant High Off High >1/3VCC >2/3VCC Low On High >1/3VCC <2/3VCC As previouslyestablished (1) Voltagelevelsshown arenominal.

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S R TRIG THRES VCC CONT RESET OUT DISCH GND Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 FUNCTIONAL BLOCK DIAGRAM A. Pinnumbers shown arefortheD, JG, P,PS, and PW packages. B. RESET can overrideTRIG, whichcan overrideTHRES. Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLink(s):NA555 NE555 SA555 SE555

NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com AbsoluteMaximum Ratings(1) overoperatingfree-airtemperaturerange(unlessotherwisenoted) MIN MAX UNIT VCC Supplyvoltage(2) 18 V VI Inputvoltage CONT, RESET, THRES, TRIG VCC V IO Outputcurrent ±225 mA D package 97 P package 85 qJA Package thermalimpedance(3)(4) °C/W PS package 95 PW package 149 FK package 5.61 qJC Package thermalimpedance(5)(6) °C/W JG package 14.5 TJ Operatingvirtualjunctiontemperature 150 °C Case temperaturefor60 s FK package 260 °C Lead temperature1,6 mm (1/16in)fromcase for60 s JG package 300 °C Tstg Storagetemperaturerange –65 150 °C (1) Stressesbeyond thoselistedunder"absolutemaximum ratings"may cause permanentdamage tothedevice.These arestressratings only,and functionaloperationofthedeviceattheseorany otherconditionsbeyond thoseindicatedunder"recommended operating conditions"isnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmay affectdevicereliability. (2) AllvoltagevaluesarewithrespecttoGND. (3) Maximum power dissipationisa functionofTJ(max),qJA,and TA.The maximum allowablepower dissipationatany allowableambient temperatureisPD = (TJ(max)-TA)/qJA. Operatingattheabsolutemaximum TJ of150°C can affectreliability. (4) The package thermalimpedance iscalculatedinaccordancewithJESD 51-7. (5) Maximum power dissipationisa functionofTJ(max),qJC,and TC .The maximum allowablepower dissipationatany allowablecase temperatureisPD = (TJ(max)-TC )/qJC.Operatingattheabsolutemaximum TJ of150°C can affectreliability. (6) The package thermalimpedance iscalculatedinaccordancewithMIL-STD-883. Recommended OperatingConditions overoperatingfree-airtemperaturerange(unlessotherwisenoted) MIN MAX UNIT NA555, NE555, SA555 4.5 16 VCC Supplyvoltage V SE555 4.5 18 VI Inputvoltage CONT, RESET, THRES, and TRIG VCC V IO Outputcurrent ±200 mA NA555 –40 105 NE555 0 70 TA Operatingfree-airtemperature °C SA555 –40 85 SE555 –55 125

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NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 ElectricalCharacteristics VCC = 5 V to15 V,TA = 25°C (unlessotherwisenoted) NA555 SE555 NE555 PARAMETER TEST CONDITIONS UNITSA555 MIN TYP MAX MIN TYP MAX VCC = 15 V 9.4 10 10.6 8.8 10 11.2 THRES voltagelevel V THRES current(1) 30 250 30 250 nA 4.8 5 5.2 4.5 5 5.6 VCC = 15 V TA = –55°C to125°C 3 6 TRIG voltagelevel V VCC = 5 V TA = –55°C to125°C 1.9 TRIG current TRIG at0 V 0.5 0.9 0.5 2 mA 0.3 0.7 1 0.3 0.7 1 RESET voltagelevel V TA = –55°C to125°C 1.1 RESET atVCC 0.1 0.4 0.1 0.4 RESET current mA RESET at0 V –0.4 –1 –0.4 –1.5 DISCH switchoff-state 20 100 20 100 nAcurrent 9.6 10 10.4 9 10 11 VCC = 15 V VCC = 5 V TA = –55°C to125°C 2.9 3.8 0.1 0.15 0.1 0.25 VCC = 15 V,IOL = 10 mA TA = –55°C to125°C 0.2 0.4 0.5 0.4 0.75 VCC = 15 V,IOL = 50 mA TA = –55°C to125°C 1 2 2.2 2 2.5 VCC = 15 V,IOL = 100 mA Low-leveloutputvoltage TA = –55°C to125°C 2.7 V VCC = 15 V,IOL = 200 mA 2.5 2.5 VCC = 5 V,IOL = 3.5mA TA = –55°C to125°C 0.35 0.1 0.2 0.1 0.35 VCC = 5 V,IOL = 5 mA TA = –55°C to125°C 0.8 VCC = 5 V,IOL = 8 mA 0.15 0.25 0.15 0.4 13 13.3 12.75 13.3 VCC = 15 V,IOL = –100 mA TA = –55°C to125°C 12 High-leveloutputvoltage VCC = 15 V,IOH = –200 mA 12.5 12.5 V 3 3.3 2.75 3.3 VCC = 5 V,IOL = –100 mA TA = –55°C to125°C 2 VCC = 15 V 10 12 10 15 Outputlow,No load VCC = 5 V 3 5 3 6 Supplycurrent mA VCC = 15 V 9 10 9 13 Outputhigh,No load VCC = 5 V 2 4 2 5 (1) Thisparameterinfluencesthemaximum valueofthetimingresistorsR A and R B inthecircuitofFigure12.Forexample, when VCC = 5 V,themaximum valueisR = R A + R B ≉ 3.4M Ω,and forVCC = 15 V,themaximum valueis10 M Ω. Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLink(s):NA555 NE555 SA555 SE555

NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com OperatingCharacteristics VCC = 5 V to15 V,TA = 25°C (unlessotherwisenoted) NA555 SE555 NE555TESTPARAMETER UNITSA555CONDITIONS (1) MIN TYP MAX MIN TYP MAX Each timer,monostable(3) TA = 25°C 0.5 1.5(4) 1 3Initialerroroftiming %interval(2) Each timer,astable(5) 1.5 2.25 Each timer,monostable(3) TA = MIN toMAX 30 100(4) 50Temperaturecoefficientof ppm/ timinginterval °CEach timer,astable(5) 90 150 C L = 15 pF,Output-pulserisetime 100 200(4) 100 300 nsTA = 25°C C L = 15 pF,Output-pulsefalltime 100 200(4) 100 300 nsTA = 25°C (1) Forconditionsshown as MIN orMAX, use theappropriatevaluespecifiedunderrecommended operatingconditions. (2) Timingintervalerrorisdefinedas thedifferencebetween themeasured valueand theaveragevalueofa random sample fromeach processrun. (3) Valuesspecifiedarefora deviceina monostablecircuitsimilartoFigure9,withthefollowingcomponent values:R A = 2 kΩ to100 kΩ, C = 0.1mF. (4) On productscomplianttoMIL-PRF-38535,thisparameterisnotproductiontested. (5) Valuesspecifiedarefora deviceinan astablecircuitsimilartoFigure12,withthefollowingcomponent values:R A = 1 kΩ to100 kΩ, C = 0.1mF.

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ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ TA = 125°C ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = 25°C IOL − Low-Level Output Current − mA ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ VCC = 5 V LOW -LEVEL OUTPUT VOL TAGE vs LOW -LEVEL OUTPUT CURRENT ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ TA = −55°C 0.1 0.04 0.01 1 2 4 7 10 20 40 70 100 0.07 0.4 0.7 0.02 0.2 − Low-Level Output Voltage − VVOL ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ VCC = 10 V LOW -LEVEL OUTPUT VOL TAGE vs LOW -LEVEL OUTPUT CURRENT − Low-Level Output Voltage − VVOL IOL − Low-Level Output Current − mA 0.1 0.04 0.01 1 2 4 7 10 20 40 70 100 0.07 0.4 0.7 0.02 0.2 ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = 125°C ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = 25°C ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = −55°C TA = 125°C TA = 25°C TA = −55°C ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ VCC = 15 V LOW -LEVEL OUTPUT VOL TAGE vs LOW -LEVEL OUTPUT CURRENT − Low-Level Output Voltage − VVOL IOL − Low-Level Output Current − mA 0.1 0.04 0.01 1 2 4 7 10 20 40 70 100 0.07 0.4 0.7 0.02 0.2 0.6 0.2 1.4 1.8 2.0 0.4 1.6 0.8 1.2 IOH − High-Level Output Current − mA ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = 125°C ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = 25°C 100704020107421 ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ VCC = 5 V to 15 V ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ TA = −55°C VCC VOH − Voltage Drop − V)( DROP BETWEEN SUPPL Y VOLTAGE AND OUTPUT vs HIGH-LEVEL OUTPUT CURRENT NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 TYPICAL CHARACTERISTICS Data fortemperaturesbelow0°C and above 70°C areapplicableforSE555 circuitsonly. Figure1. Figure2. Figure3. Figure4. Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLink(s):NA555 NE555 SA555 SE555

− Supply Current − mA SUPPL Y CURRENT vs SUPPL Y VOLTAGE 12 13 14 15 TA = 25°C TA = 125°C TA = −55°C Output Low, No Load CCI VCC − Supply Voltage − V 0.995 0.990 0.985 0 5 10 1.005 1.010 NORMALIZED OUTPUT PULSE DURA TION (MONOST ABLE OPERA TION) vs SUPPL Y VOLTAGE 1.015 15 20 CCVPulse Duration Relative to Value at = 10 V VCC − Supply Voltage − V 0.995 0.990 0.985 −75 −25 25 1.005 1.010 NORMALIZED OUTPUT PULSE DURA TION (MONOST ABLE OPERA TION) vs FREE-AIR TEMPERA TURE 1.015 75 125 TA − Free-Air Temperature − °C −50 0 50 100 VCC = 10 V Pulse Duration Relative to Value at TA = 25/C0053C 100 200 300 400 500 600 700 800 900 1000 Lowest Level of Trigger Pulse – ×VCC tPD – Propagation Delay Time – ns TA = 125° C TA = 70° C TA = 25° C TA = 0° C TA = –55° C PROPAGATION DELAY TIME vs LOWEST VOLTAGE LEVEL OF TRIGGER PULSE NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) Data fortemperaturesbelow0°C and above 70°C areapplicableforSE555 circuitsonly. Figure5. Figure6. Figure7. Figure8.

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(5 V to 15 V) R A R L Output GND OUT VCCCONT RESET DISCH THRES TRIGInput Î Î Î 5 8 Pin numbers shown are for the D, JG, P, PS, and PW packages. NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010

APPLICATION INFORMATION

For monostableoperation,any of thesetimerscan be connectedas shown inFigure9. Ifthe outputislow, applicationofa negative-goingpulsetothetrigger(TRIG)setstheflip-flop(Q goes low),drivestheoutputhigh, and turnsoffQ1. CapacitorC then ischarged throughR A untilthe voltageacrossthe capacitorreachesthe thresholdvoltageofthethreshold(THRES) input.IfTRIG has returnedtoa highlevel,theoutputofthethreshold comparatorresetstheflip-flop(Q goes high),drivestheoutputlow,and dischargesC throughQ1. Figure9. CircuitforMonostable Operation Monostable operationis initiatedwhen TRIG voltagefallsbelow the triggerthreshold.Once initiated,the sequence ends onlyifTRIG ishighforatleast10 µs beforetheend ofthetiminginterval.When thetriggeris grounded,the comparatorstoragetimecan be as longas 10 µs,which limitsthe minimum monostablepulse widthto 10 µs. Because of the thresholdleveland saturationvoltageof Q1, the outputpulse durationis approximatelytw = 1.1RAC. Figure11 isa plotofthetimeconstantforvariousvaluesofR A and C. The threshold levelsand chargeratesbotharedirectlyproportionaltothesupplyvoltage,VCC .The timingintervalis,therefore, independentofthesupplyvoltage,so longas thesupplyvoltageisconstantduringthetimeinterval. Applyinga negative-goingtriggerpulsesimultaneouslytoRESET and TRIG duringthetimingintervaldischarges C and reinitiatesthecycle,commencing on thepositiveedge oftheresetpulse.The outputisheldlow as long as theresetpulseislow.To preventfalsetriggering,when RESET isnotused,itshouldbe connectedtoVCC . Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLink(s):NA555 NE555 SA555 SE555

− Output Pulse Duration − s C − Capacitance − µF 10−1 10−2 10−3 10−4 1001010.10.01 10−5 0.001 tw R A = 10 MΩ R A = 10 kΩ R A = 1 kΩ R A = 100 kΩ R A = 1 MΩ Voltage − 2 V/div Time − 0.1 ms/div ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ Capacitor Voltage Output Voltage Input Voltage ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ R A = 9.1 kΩ C L = 0.01 µF R L = 1 kΩ See Figure 9 Voltage − 1 V/div Time − 0.5 ms/div tH Capacitor Voltage Output VoltagetL ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ R A = 5 k/C0087 RL = 1 k/C0087 R B = 3 k/C0087 See Figure 12 C = 0.15 µF GND OUT VCCCONT RESET DISCH THRES TRIG C R B R A Output R L 0.01 µF VCC (5 V to 15 V) (see Note A) Î Î Î NOTE A: Decoupling CONT voltage to ground with a capacitor can improve operation. This should be evaluated for individual applications. Open 5 8 Pin numbers shown are for the D, JG, P, PS, and PW packages. NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com Figure10.TypicalMonostable Waveforms Figure11.Output Pulse Durationvs Capacitance AstableOperation As shown inFigure12,addinga second resistor,R B,tothecircuitofFigure9 and connectingthetriggerinputto thethresholdinputcauses thetimertoself-triggerand run as a multivibrator.The capacitorC chargesthrough R A and R B and thendischargesthroughR B only.Therefore,thedutycycleiscontrolledby thevaluesofR A and R B. This astableconnectionresultsin capacitorC chargingand dischargingbetween the threshold-voltagelevel (≉0.67 × VCC ) and the trigger-voltagelevel(≉0.33× VCC ).As inthe monostablecircuit,charge and discharge times(and,therefore,thefrequencyand dutycycle)areindependentofthesupplyvoltage. Figure12.CircuitforAstableOperation Figure13.TypicalAstableWaveforms

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tH /C00430.693 (RA /C0041R B) C tL /C00430.693 (RB) C Other useful relationships are shown below. period/C0043tH /C0041tL /C00430.693 (RA /C00412R B) C frequency/C00911.44 (RA /C00412R B) C Output driver duty cycle/C0043 tL tH /C0041tL /C0043 R B R A /C00412R B Output waveform duty cycle /C0043 tL tH /C0043 R B R A /C0041R B Low-to-high ratio /C0043 tH tH /C0041tL /C00431– R B R A /C00412R B f − Free-Running Frequency − Hz C − Capacitance − µF 100 k 10 k 1 k 100 1001010.10.01 0.1 0.001 R A + 2 RB = 10 MΩ R A + 2 RB = 1 MΩ R A + 2 RB = 100 kΩ R A + 2 RB = 10 kΩ R A + 2 RB = 1 kΩ Time − 0.1 ms/div Voltage − 2 V/div ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ VCC = 5 V R A = 1 kΩ C = 0.1 µF See Figure 15 Capacitor Voltage ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ Output Voltage Input Voltage VCC (5 V to 15 V) DISCH OUT VCCRESET R L R A A5T3644 C THRES GND CONT TRIG Input 0.01 µF ÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎ Output 4 8 Pin numbers shown are shown for the D, JG, P, PS, and PW packages. NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 Figure12 shows typicalwaveforms generatedduringastableoperation.The outputhigh-leveldurationtH and low-leveldurationtL can be calculatedas follows: Figure. Figure14.Free-RunningFrequency Missing-PulseDetector The circuitshown in Figure15 can be used to detecta missingpulseor abnormallylong spacingbetween consecutivepulsesina trainofpulses.The timingintervalofthemonostablecircuitisretriggeredcontinuouslyby theinputpulsetrainas longas thepulsespacingislessthanthetiminginterval.A longerpulsespacing,missing pulse,or terminatedpulsetrainpermitsthetimingintervaltobe completed,therebygeneratingan outputpulse as shown inFigure16. Figure15.CircuitforMissing-PulseDetector Figure16.Completed Timing Waveforms for Missing-PulseDetector Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLink(s):NA555 NE555 SA555 SE555

Voltage − 2 V/div Time − 0.1 ms/div Capacitor Voltage Output Voltage Input Voltage ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ VCC = 5 V R A = 1250 Ω C = 0.02 µF See Figure 9 NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com Frequency Divider By adjustingthelengthofthetimingcycle,thebasiccircuitofFigure9 can be made tooperateas a frequency divider.Figure17 shows a divide-by-threecircuitthatmakes use ofthefactthatretriggeringcannotoccurduring thetimingcycle. Figure17. Divide-by-ThreeCircuitWaveforms

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C R AR L VCC (5 V to 15 V) Output DISCH OUT VCCRESET TRIG CONT Modulation Input (see Note A) Clock Input NOTE A: The modulating signal can be direct or capacitively coupled to CONT. For direct coupling, the effects of modulation source voltage and impedance on the bias of the timer should be considered. 4 8 Pin numbers shown are for the D, JG, P, PS, and PW packages. Voltage − 2 V/div Time − 0.5 ms/div ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ Capacitor Voltage ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ Output Voltage ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ ÏÏÏÏÏÏ Clock Input Voltage ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ R A = 3 kΩ C = 0.02 µF R L = 1 kΩ See Figure 18 ÏÏÏÏÏÏÏ ÏÏÏÏÏÏÏ ÏÏÏÏÏÏÏ Modulation Input Voltage NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 Pulse-WidthModulation The operationofthetimercan be modifiedby modulatingtheinternalthresholdand triggervoltages,which is accomplishedby applyingan externalvoltage(orcurrent)to CONT. Figure18 shows a circuitforpulse-width modulation.A continuousinputpulsetraintriggersthe monostablecircuit,and a controlsignalmodulatesthe thresholdvoltage.Figure19 shows theresultingoutputpulse-widthmodulation.Whilea sine-wavemodulation signalisshown,any wave shape couldbe used. Figure18.CircuitforPulse-WidthModulation Figure19.Pulse-Width-ModulationWaveforms Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLink(s):NA555 NE555 SA555 SE555

Voltage − 2 V/div ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ R A = 3 kΩ R B = 500 Ω R L = 1 kΩ See Figure 20 ÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎÎÎ Capacitor Voltage ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ Output Voltage ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ Modulation Input Voltage Time − 0.1 ms/div R B Modulation Input (see Note A) CONT TRIG RESET V CC OUT DISCH VCC (5 V to 15 V) R L R A C GND THRES NOTE A: The modulating signal can be direct or capacitively coupled to CONT . For direct coupling, the effects of modulation source voltage and impedance on the bias of the timer should be considered. Pin numbers shown are for the D, JG, P, PS, and PW packages. 4 8 Output NA555,NE555,SA555,SE555 SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 www.ti.com Pulse-PositionModulation As shown in Figure20, any of these timerscan be used as a pulse-positionmodulator.This application modulatesthe thresholdvoltageand, thereby,the timedelay,of a free-runningoscillator.Figure21 shows a triangular-wavemodulationsignalforsuch a circuit;however,any wave shape couldbe used. Figure20.CircuitforPulse-PositionModulation Figure21.Pulse-Position-ModulationWaveforms

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S VCC RESET V CC OUT DISCH GND CONT TRIG 4 8 THRES R C C C 0.01 C C = 14.7 µF R C = 100 kΩ Output C RESET V CC OUT DISCH GND CONT TRIG 4 8 THRES R B 33 kΩ 0.001 0.01 µF C B = 4.7 µF R B = 100 kΩ Output BOutput AR A = 100 kΩ C A = 10 µF µF 0.01 µF 0.001 33 kΩRA THRES TRIG CONT GND DISCH OUT VCCRESET µF µF C BC A Pin numbers shown are for the D, JG, P, PS, and PW packages. NOTE A: S closes momentarily at t = 0. Voltage − 5 V/div t − Time − 1 s/div ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ See Figure 22 ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ Output A ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ Output B ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ Output C ÏÏÏ ÏÏÏ ÏÏÏ ÏÏÏ t = 0 ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ tw C = 1.1 RC C C ÏÏ ÏÏ ÏÏ tw C ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ tw B = 1.1 RB C B ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ tw A = 1.1 RA C A ÏÏÏ ÏÏÏ ÏÏÏ ÏÏÏ tw A ÏÏÏ ÏÏÏ ÏÏÏ ÏÏÏ tw B NA555,NE555,SA555,SE555 www.ti.com SLFS022H –SEPTEMBER 1973–REVISED JUNE 2010 SequentialTimer Many applications,such as computers,requiresignalsfor initializingconditionsduring start-up.Other applications,such as testequipment,requireactivationoftestsignalsinsequence.These timingcircuitscan be connectedto providesuch sequentialcontrol.The timerscan be used invariouscombinationsof astableor monostablecircuitconnections,withor withoutmodulation,forextremelyflexiblewaveform control.Figure22 shows a sequencer circuitwith possibleapplicationsin many systems,and Figure23 shows the output waveforms. Figure22. SequentialTimer Circuit Figure23. SequentialTimer Waveforms Copyright© 1973–2010,Texas InstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLink(s):NA555 NE555 SA555 SE555

www.ti.com 4-Jun-2010 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) Samples (Requires Login) JM38510/10901BPA ACTIVE CDIP JG 8 1 TBD A42 N / A for Pkg Type Purchase Samples NA555D ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NA555DG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NA555DR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples NA555DRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples NA555P ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Request Free Samples NA555PE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Request Free Samples NE555D ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples NE555DE4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples NE555DG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples NE555DR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555DRE4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555DRG3 PREVIEW SOIC D 8 2500 TBD Call TI Call TI Samples Not Available NE555DRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555P ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Contact TI Distributor or Sales Office NE555PE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Contact TI Distributor or Sales Office NE555PSLE OBSOLETE SO PS 8 TBD Call TI Call TI Samples Not Available NE555PSR ACTIVE SO PS 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555PSRE4 ACTIVE SO PS 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office

www.ti.com 4-Jun-2010 Addendum-Page 2 Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) Samples (Requires Login) NE555PSRG4 ACTIVE SO PS 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555PW ACTIVE TSSOP PW 8 150 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555PWE4 ACTIVE TSSOP PW 8 150 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555PWG4 ACTIVE TSSOP PW 8 150 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office NE555PWR ACTIVE TSSOP PW 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples NE555PWRE4 ACTIVE TSSOP PW 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples NE555PWRG4 ACTIVE TSSOP PW 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples NE555Y OBSOLETE 0 TBD Call TI Call TI Samples Not Available SA555D ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples SA555DE4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples SA555DG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples SA555DR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office SA555DRE4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office SA555DRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor or Sales Office SA555P ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Contact TI Distributor or Sales Office SA555PE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Contact TI Distributor or Sales Office SE555D ACTIVE SOIC D 8 75 TBD CU NIPDAU Level-1-220C-UNLIM Request Free Samples SE555DG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples SE555DR ACTIVE SOIC D 8 2500 TBD CU NIPDAU Level-1-220C-UNLIM Purchase Samples

www.ti.com 4-Jun-2010 Addendum-Page 3 Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) Samples (Requires Login) SE555DRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples SE555FKB ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type Purchase Samples SE555JG ACTIVE CDIP JG 8 1 TBD A42 N / A for Pkg Type Purchase Samples SE555JGB ACTIVE CDIP JG 8 1 TBD A42 N / A for Pkg Type Purchase Samples SE555N OBSOLETE PDIP N 8 TBD Call TI Call TI Samples Not Available SE555P ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Request Free Samples (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF SE555, SE555M :

• Catalog: SE555

www.ti.com 4-Jun-2010 Addendum-Page 4

• Military: SE555M
• Space: SE555-SP , SE555-SP NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
• Military - QML certified for Military and Defense Applications
• Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) (mm) (mm) (mm) (mm) W (mm) Pin1 Quadrant PACKAGE MATERIALS INFORMATION www.ti.com 3-Jun-2010 Pack Materials-Page 1

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) NA555DR SOIC D 8 2500 346.0 346.0 29.0 NA555DR SOIC D 8 2500 340.5 338.1 20.6 NE555DR SOIC D 8 2500 340.5 338.1 20.6 NE555DR SOIC D 8 2500 346.0 346.0 29.0 NE555PSR SO PS 8 2000 346.0 346.0 33.0 NE555PWR TSSOP PW 8 2000 346.0 346.0 29.0 SA555DR SOIC D 8 2500 340.5 338.1 20.6 PACKAGE MATERIALS INFORMATION www.ti.com 3-Jun-2010 Pack Materials-Page 2

MCER001A – JANUARY 1995 – REVISED JANUARY 1997 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE 0.310 (7,87) 0.290 (7,37) 0.014 (0,36) 0.008 (0,20) Seating Plane 4040107/C 08/96 0.065 (1,65) 0.045 (1,14) 0.020 (0,51) MIN 0.400 (10,16) 0.355 (9,00) 0.015 (0,38) 0.023 (0,58) 0.063 (1,60) 0.015 (0,38) 0.200 (5,08) MAX 0.130 (3,30) MIN 0.245 (6,22) 0.280 (7,11) 0.100 (2,54) 0°–15° NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. This package can be hermetically sealed with a ceramic lid using glass frit. D. Index point is provided on cap for terminal identification. E. Falls within MIL STD 1835 GDIP1-T8

MLCC006B – OCTOBER 1996 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 FK (S-CQCC-N**) LEADLESS CERAMIC CHIP CARRIER 4040140/D 10/96

28 TERMINAL SHOWN

B 0.358 (9,09) MAX (11,63) 0.560 (14,22) 0.560 0.458 0.858 (21,8) 1.063 (27,0) (14,22) ANO. OF MINMAX 0.358 0.660 0.761 0.458 0.342 (8,69) MIN (11,23) (16,26) 0.640 0.739 0.442 (9,09) (11,63) (16,76) 0.962 1.165 (23,83) 0.938 (28,99) 1.141 (24,43) (29,59) (19,32)(18,78) 0.020 (0,51) TERMINALS 0.080 (2,03) 0.064 (1,63) (7,80) 0.307 (10,31) 0.406 (12,58) 0.495 (12,58) 0.495 (21,6) 0.850 (26,6) 1.047 0.045 (1,14) 0.045 (1,14) 0.035 (0,89) 0.035 (0,89) 0.010 (0,25) 121314151618 17 432 0.020 (0,51) 0.010 (0,25) 12826 27 B SQ A SQ 0.055 (1,40) 0.045 (1,14) 0.028 (0,71) 0.022 (0,54) 0.050 (1,27) NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. This package can be hermetically sealed with a metal lid. D. The terminals are gold plated. E. Falls within JEDEC MS-004

MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE

14 PINS SHOWN

0,65 M0,10 0,10 0,25 0,50 0,75 0,15 NOM Gage Plane 9,80 9,60 7,90 7,70 2016 6,60 6,40 4040064/F 01/97 0,30 6,60 6,20 0,19 4,30 4,50 0,15 A 1,20 MAX 5,10 4,90 3,10 2,90 A MAX A MIN DIM PINS ** 0,05 4,90 5,10 Seating Plane 0°–8° NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion not to exceed 0,15. D. Falls within JEDEC MO-153

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