TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 ULTRA-LOW VOLTAGE PROCESSOR SUPERVISORY CIRCUITS FEATURES DBV PACKAGE • MinimumSupplyVoltageof0.75V (TOP VIEW) • SupplyVoltageSupervisionRange: TPS3123/T – 1.2V,1.5V,1.8V(TPS312x) PS3128 – 3V(TPS3125DevicesOnly) RESET 1 5 VDD – OtherVersionsonRequest • Power-OnResetGeneratorWithFixedDelay GND 2 Timeof180ms MR 3 4 WDI • ManualResetInput(TPS3123/5/6/8) • WatchdogTimerRetriggerstheRESETOutput TPS3124 atV ‡ V DD IT • SupplyCurrentof14µA(Typ) RESET 1 5 VDD • SmallSOT23-5Package GND 2 • TemperatureRangeof -40(cid:176)C to85(cid:176)C • ResetOutputAvailableinPush-Pull(Active RESET 3 4 WDI LowandHigh)andOpen-Drain(Active-Low) TPS3125/ APPLICATIONS TPS3126 • ApplicationsUsingLowVoltageDSPs, RESET 1 5 VDD Microcontrollers,orMicroprocessors • Portable/Battery-PoweredEquipment GND 2 • WirelessCommunicationSystems • ProgrammableControls RESET 3 4 MR • IndustrialEquipment • Notebook/DesktopComputers • IntelligentInstruments 1.2 V CVDD DVDD TMS320UVC5402 VDD RESET RESET MR WDI XF GND TPS3123J12 GND Figure1.TypicalLow-VoltageDSPApplication Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet. PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©1999–2004,TexasInstrumentsIncorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarilyincludetestingofallparameters.

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 DESCRIPTION The TPS312x family of ultralow voltage processor supervisory circuits provides circuit initialization and timing supervision,primarilyforDSPandprocessor-basedsystems. Duringpower-on,RESETisasserted when the supply voltage (V ) becomes higher than 0.75 V. Thereafter, the DD supply voltage supervisor monitors V and keeps RESET output active as long as V remains below the DD DD threshold voltage (V ). An internal timer delays the return of the output to the inactive state (high) to ensure IT propersystemreset.Thedelaytime,t =180ms,startsafterV hasrisenabovethethresholdvoltage(V ). d DD IT When the supply voltage drops below the threshold voltage (V ), the output becomes active (low) again. No IT external components are required. All the devices of this family have a fixed-sense threshold voltage (V ) set by IT ahighprecisioninternalvoltagedivider. The TPS3123/5/6/8 devices incorporate a manual reset input, MR. A low level at MR causes RESET to become active. The TPS3124 devices do not have the input MR, but include a high-level output RESET same as the TPS3125 and TPS3126 devices. In addition, the TPS3123/4/8 have a watchdog timer that needs to be triggered periodically by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval t = 0.8 s, RESET output becomes active for the time period (t ). tout d Thiseventalsoreinitializesthewatchdogtimer. The circuits are available in a 5-pin SOT23-5 package. The TPS312x devices are characterized for operation overatemperaturerangeof-40(cid:176)C to85(cid:176)C. PACKAGEINFORMATIONSTANDARDVERSIONS(1) T DEVICENAME THRESHOLDVOLTAGE MARKING A TPS3123J12DBVR(2) TPS3123J12DBVT(3) 1.08V PBNI TPS3123G15DBVR(2) TPS3123G15DBVT(3) 1.40V PBOI TPS3123J18DBVR(2) TPS3123J18DBVT(3) 1.62V PBPI TPS3124J12DBVR(2) TPS3124J12DBVT(3) 1.08V PBQI TPS3124G15DBVR(2) TPS3124G15DBVT(3) 1.40V PBRI TPS3124J18DBVR(2) TPS3124J18DBVT(3) 1.62V PBSI TPS3125J12DBVR(2) TPS3125J12DBVT(3) 1.08V PBTI TPS3125G15DBVR(2) TPS3125G15DBVT(3) 1.40V PBUI -40(cid:176)C to85(cid:176)C TPS3125J18DBVR(2) TPS3125J18DBVT(3) 1.62V PBVI TPS3125L30DBVR(2) TPS3125L30DBVT(3) 2.64V PBXI TPS3126E12DBVR(2) TPS3126E12DBVT(3) 1.14V PFOI TPS3126E15DBVR(2) TPS3126E15DBVT(3) 1.43V PFPI TPS3126E18DBVR(2) TPS3126E18DBVT(3) 1.71V PFQI TPS3128E12DBVR(2) TPS3128E12DBVT(3) 1.14V PFRI TPS3128E15DBVR(2) TPS3128E15DBVT(3) 1.43V PFSI TPS3128E18DBVR(2) TPS3128E18DBVT(3) 1.71V PFTI (1) Otherversionsavailable.ContactTexasInstrumentsfordeetails,minimumorderquantitiesapply. (2) TheDBVRpassiveindicatestapeandreelof3000parts. (3) TheDBVTpassiveindicatestapeandreelof250parts. 2

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 TPS312 3 J 12 DBV R Reel Package Nominal Supply Voltage Typical Reset Threshold Voltage Functionality Family Table1.OrderingInformationApplicationSpecificVersions (1) NOMINALSUPPLYVOLTAGE, TYPICALRESETTHRESHOLD DEVICENAME DEVICENAME V VOLTAGE-V NOM IT- TPS312xx12DBV 1.2V TPS312xAxxDBV V -1% NOM TPS312xx15DBV 1.5V TPS312xBxxDBV V -2% NOM TPS312xx18DBV 1.8V TPS312xCxxDBV V -3% NOM TPS312xx30DBV 3.0V TPS312xDxxDBV V -4% NOM TPS312xExxDBV V -5% NOM TPS312xFxxDBV V -6% NOM TPS312xGxxDBV V -7% NOM TPS312xHxxDBV V -8% NOM TPS312xIxxDBV V -9% NOM TPS312xJxxDBV V -10% NOM TPS312xKxxDBV V -11% NOM TPS312xLxxDBV V -12% NOM TPS312xMxxDBV V -13% NOM TPS312xNxxDBV V -14% NOM TPS312xOxxDBV V -15% NOM (1) FortheapplicationspecificversionscontactTexasInstrumentsforavailability,leadtime,andminimumorderquantities. Table2.FunctionTables TPS3123/8 TPS3124 TPS3125/6 MR VDD>V RESET VDD>V RESET RESET MR VDD>V RESET RESET IT IT IT L 0 L 0 L H L 0 L H L 1 L 1 H L L 1 L H H 0 L H 0 L H H 1 H H 1 H L ResetTopology DEVICES OPENDRAIN PUSH-PULL TPS3123 X TPS3124 X TPS3125 X TPS3126 X TPS3128 X 3

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 FUNCTIONALBLOCKDIAGRAM VDD Device Power Supply R1 MR† R2 RESET Reset Logic + Timer R3 RESET§ GND Reference Voltage Watchdog Transition WDI‡ Logic + Detector Timer †TPS3123/5/6/8 ‡TPS3123/4/8 §TPS3124/5/6 TIMINGDIAGRAMTPS3123/5/6/8 A B C D E F G VDD VIT <0.85 V t MR t RESET td td td t Output Undefined Output Undefined 4

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 TIMINGDIAGRAMTPS3123/4//8 A B VDD VIT <0.85 V t G MR (TPS3123) t C D E F H J WDI * * * * * t td td td td td RESET ttout ttout ttout t Output Undefined * = WDI Disabled ABSOLUTE MAXIMUM RATINGS overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1) UNIT Manualreset,MR -0.3VtoV +0.6V DD Supplyvoltage,V 3.6V DD Watchdoginput,WDI -0.3VtoV +6V DD Maximumlowoutputcurrent,I 5mA OL Maximumhighoutputcurrent,I -5mA OH Inputclampcurrent,I (V<0orV >V ) –10 mA IK I I DD Outputclampcurrent,I (V <0orV >V ) –10 mA OK O O DD Continuoustotalpowerdissipation SeeDissipationRatingTable Operatingfree-airtemperaturerange,T -40(cid:176)C to85(cid:176)C A Storagetemperaturerange,T -65(cid:176)C to150(cid:176)C stg Solderingtemperature 260(cid:176)C (1) Stressesbeyondthoselistedunder"absolutemaximumratings"maycausepermanentdamagetothedevice.Thesearestressratings only,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder"recommendedoperating conditions"isnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability. 5

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 DISSIPATION RATING TABLE T £ 25(cid:176)C DERATINGFACTOR T =70(cid:176)C T =85(cid:176)C PACKAGE POWAERRATING ABOVET =25(cid:176)C POWAERRATING POWAERRATING A DBV 437mW 3.5mW/(cid:176)C 280mW 227mW RECOMMENDED OPERATING CONDITIONS atspecifiedtemperaturerange MIN MAX UNIT T =0(cid:176)C to85(cid:176)C 0.75 3.3 A Supplyvoltage,V V DD T =-40(cid:176)C to85(cid:176)C 0.85 3.3 A Manualresetvoltage,V 0.0 V +0.3 V DD DD Watchdoginputvoltage,V 0 V +0.3 V WD1 DD High-levelinputvoltage,V 0.7·V V IH DD Low-levelinputvoltage,V 0.3·V V IL DD InputtransitionriseandfallrateatWDI,D t/DV 1 µs/V Operatingfree-airtemperaturerange,T 40 85 (cid:176)C A ELECTRICAL CHARACTERISTICS overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT MRpullupresistor(internal) 27 kW WDI WDI=V =3.3V 1 1 DD I High-levelinputcurrent µA IH MR MR=0.7· V , V =3.3V 20 55 DD DD WDI WDI=0V, V =3.3V 1 1 DD I Low-levelinputcurrent µA IL MR MR=0V, V =3.3V 80 170 DD High-leveloutputcurrent TPS3126-xx, I V =V =3.3V 200 nA OH (leakageintoRESETpin) TPS3128-xx DD OH V =1.5V, I =-1mA DD OH RESET V High-leveloutputvoltage VDD=3.3V, IOH=-4.5mA 0.8·V V OH (TPS3123/4/5only) V =0.75V, I =-8µA DD DD OH RESET V =1.5V, I =-1mA DD OH V =0.75V, I =15µA DD OL RESET V =1.5V, I =1.4mA 0.2· V DD OL DD V Low-leveloutputvoltage V OL V =1.5V, I =1.4mA DD OL RESET V =3.3V, I =3mA 0.4 DD OL TPS312xJ12 1.04 1.08 1.12 TPS312xG15 1.35 1.40 1.45 TPS312xJ18 1.56 1.62 1.68 V Negative-goinginputthreshold TPS312xL30 T =-40(cid:176)C to85(cid:176)C 2.57 2.64 2.71 V IT- voltage (1) A TPS312xE12 1.10 1.14 1.18 TPS312xE15 1.38 1.43 1.48 TPS312xE18 1.65 1.71 1.77 1V<V <1.4V 15 IT- V HysteresisatV input 1.4V<V <2V 20 mV hys DD IT- 2V<V <3V 30 IT- (1) Toensurebeststabilityofthethresholdvoltage,abypasscapacitor(ceramic,0.1µF)shouldbeplacednearthesupplyterminal. 6

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 ELECTRICAL CHARACTERISTICS (continued) overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT TPS3123-xx V =0.75V 14 WDI=V , DD TPS3124-xx DD TPS3128-xx MRunconnected VDD=3.3V 22 30 I Supplycurrent µA DD TPS3125-xx VDD=0.75V 14 MRunconnected TPS3126-xx (2) V =3.3V 18 25 DD C InputcapacitanceatMR,WDI V =0Vto3.3V 5 pF i I (2) Thesupplycurrentduringdelaytimet istypical5µAhigher. d TIMING REQUIREMENTS atR =1MW, C =50pF,T =25(cid:176)C L L A PARAMETER TESTCONDITIONS MIN TYP MAX UNIT AtV V =V +0.2V, V =V -0.2V 6 DD IH IT- IL IT- t Pulsewidth AtMR 1 µs w V ‡ V +0.2V, V =0.3xV , V =0.7· V DD IT- IL DD IH DD AtWDI 0.1 SWITCHING CHARACTERISTICS atR =1MW, C =50pF,T =25(cid:176)C L L A PARAMETER TESTCONDITIONS MIN TYP MAX UNIT V ‡ V +0.2V, t Watchdogtimeout DD IT- 0.8 1.4 2.1 s tout Seetimingdiagram V >V +0.2V, t Delaytime DD IT- 100 180 260 ms d Seetimingdiagram MRtoRESETdelay tPHL Propagationdelaytime,high-to-low-leveloutput (TPS3123/5/6/8) VDD‡ VIT-+0.2V, 0.1 V =0.2· V , µs IL DD tPLH Propagationdelaytime,low-to-high-leveloutput M(TRPSto31R2E5S/6E)Tdelay VIH=0.8· VDD 0.1 t Propagationdelaytime,high-to-low-leveloutput V toRESETdelay 10 PHL DD V =V -0.2V, tPLH Propagationdelaytime,low-to-high-leveloutput V(TDPDSt3o1R2E4/S5E/6T)delay VIILH=VIITT--+0.2V 10 µs 7

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 TYPICAL CHARACTERISTICS SUPPLYCURRENT LOW-LEVELOUTPUTVOLTAGE vs vs SUPPLYVOLTAGE LOW-LEVELOUTPUTCURRENT 25 750 TA = 25°C TPS3123J12 VDD = 0.75 V V m A 20 TPS3123J12 e − TA = 85°C g murrent − put Volta 500 TA = 25°C y C 15 Out Suppl evel TA = 0°C − C w-L 250 C o 10 L I − L O V 0 0 0 1 2 3 3.3 0 50 100 150 200 250 VDD − Supply Voltage − V IOL − Low-Level Output Current − m A Figure2. Figure3. LOW-LEVELOUTPUTVOLTAGE LOW-LEVELOUTPUTVOLTAGE vs vs LOW-LEVELOUTPUTCURRENT LOW-LEVELOUTPUTCURRENT 850 1.5 TPS3123J12 TPS3125L30 800 VDD = 0.85 V VDD = 1.5 V mV 700 MR = Open TA = 85°C V 1.25 MR = Open TA = 85°C ut Voltage − 560000 TAT A= =2 50°°CC put Voltage − 1 TAT =TAA −= = 42 005°°°CCC utp TA = −40°C Out 0.75 el O 400 vel v e e L w-L 300 ow- 0.5 o L − LVOL 210000 − VOL 0.25 0 0 0 100 200 300 400 500 0 1 2 3 4 5 6 IOL − Low-Level Output Current − m A IOL − Low-Level Output Current − mA Figure4. Figure5. 8

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 TYPICAL CHARACTERISTICS (continued) LOW-LEVELOUTPUTVOLTAGE HIGH-LEVELOUTPUTVOLTAGE vs vs LOW-LEVELOUTPUTCURRENT HIGH-LEVELOUTPUTCURRENT 3.3 1.6 TPS3125L30 TPS3123J12 3 V 2.75 VMDRD = = O3p.3e Vn TA = 85°C V 1.4 VMDRD = = O1p.5e Vn e − 2.5 TA = 25°C e − 1.2 g g olta 2.25 TA = 0°C olta utput V 1.725 TA = −40°C utput V 0.81 TA = 85°C TA = −40°C O O vel 1.5 vel TA = 25°C Le 1.25 Le 0.6 w- h- o 1 g − L 0.75 − Hi 0.4 TA = 0°C VOL 0.5 OH V 0.2 0.25 0 0 0 5 10 15 20 25 30 0 −1 −2 −3 −4 −5 IOL − Low-Level Output Current − mA IOH − High-Level Output Current − mA Figure6. Figure7. HIGH-LEVELOUTPUTVOLTAGE NORMALIZEDINPUTTHRESHOLDVOLTAGE vs vs HIGH-LEVELOUTPUTCURRENT FREE-AIRTEMPERATURE 3.4 ) 1.005 C 3 TVPDDS 3=1 32.33J V12 °25 TPS312xJ12 2.75 MR = Open (T 1.004 V I ge − 2.5 )/VA Level Output Volta 1121...722.52555 TA = 85T°AC = 25°C TA = −40°C old Voltage −V(TIT 111...000000213 gh- 1 esh − Hi 0.75 TA = 0°C Thr 1 H ut O 0.5 p V n 0.999 0.25 d I e z 0 ali 0.998 0 −5 −10 −15 −20 −25 −30 m −40 −20 0 20 40 60 80 r IOH − High-Level Output Current − mA No TA − Free-Air Temperature − °C Figure8. Figure9. 9

TPS3123-xx TPS3124-xx, TPS3125-xx TPS3126-xx, TPS3128-xx www.ti.com SLVS227B–AUGUST1999–REVISEDFEBRUARY2004 TYPICAL CHARACTERISTICS (continued) NORMALIZEDINPUTTHRESHOLDVOLTAGE MINIMUMPULSEDURATION vs vs FREE-AIRTEMPERATURE THRESHOLDOVERDRIVE ) 4.5 C 1.005 ° TPS312xL30 MR = Open 5 (2 4 VIT = 2.64 V VIT 1.004 s TPS312xL30 TA = 25°C )/A m− 3.5 V(TIT 1.003 uration 3 − D ge 1.002 se 2.5 olta Pul 2 d V 1.001 um shol nim 1.5 re 1 Mi ut Th − tw 1 np 0.999 0.5 d I e z 0 ali 0.998 0 50 100 150 200 250 300 m −40 −20 0 20 40 60 80 Nor TA − Free-Air Temperature − °C VDD − Threshold Overdrive − mV Figure10. Figure11. MINIMUMPULSEDURATION vs THRESHOLDOVERDRIVE 3.5 MR = Open 3 VIT = 1.08 V s TPS312xJ12 TA = 25°C m− n 2.5 o ati ur D 2 e s ul P m 1.5 u m Mini 1 − w t 0.5 0 0 50 100 150 200 250 300 VDD − Threshold Overdrive − mV Figure12. 10

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