FEATURESDESCRIPTION/ORDERING INFORMATIONDB, DW, OR PW PACKAGE(TOP VIEW)123456789101112242322212019181716151413(5 V) V CCADIRA1A2A3A4A5A6A7A8GNDGNDV CCB (3.3 V)V CCB (3.3 V)OEB1B2B3B4B5B6B7B8GNDSN74LVC4245AOCTAL BUS TRANSCEIVER AND3.3-V TO5-V SHIFTERWITH3-STATE OUTPUTSSCAS375H–MARCH1994–REVISED MARCH2005•Bidirectional Voltage Translator• 5.5V on A Port and2.7V to3.6V on B Port•Control Inputs V IH/V IL Levels Are Referencedto V CCA Voltage•Latch-Up Performance Exceeds250mA PerJESD17•ESD Protection Exceeds JESD22–2000-V Human-Body Model(A114-A)–200-V Machine Model(A115-A)–1000-V Charged-Device Model(C101)This8-bit(octal)noninverting bus transceivercontains two separate supply rails;B port has V CCB,which is set at3.3V,and A port has V CCA,which isset at5V.This allows for translation from a3.3-V toa5-V environment,and vice versa.The SN74LVC4245A is designed for asynchronous communication between data buses.The device transmits data from the A bus to the B bus or from the B bus to the A bus,depending on the logic level at the direction-control(DIR)input.The output-enable(OE)input can be used to disable the device so the buses are effectively isolated.The control circuitry(DIR,OE)is powered by V CCA.The SN74LVC4245A pinout allows the designer to switch to a normal all-3.3-V or all-5-V20-pin'245device without board re-layout.The designer uses the data paths for pins2–11and14–23of the SN74LVC4245A to align with the conventional'245pinout.ORDERING INFORMATIONT A PACKAGE(1)ORDERABLE PART NUMBER TOP-SIDE MARKINGTube of25SN74LVC4245ADWSOIC–DW LVC4245AReel of2000SN74LVC4245ADWRSSOP–DB Reel of2000SN74LVC4245ADBR LJ245A–40°C to85°CTube of60SN74LVC4245APWTSSOP–PW Reel of2000SN74LVC4245APWR LJ245AReel of250SN74LVC4245APWT(1)Package drawings,standard packing quantities,thermal data,symbolization,and PCB design guidelines are available at/sc/package.FUNCTION TABLEINPUTSOPERATIONOE DIRL L B data to A busL H A data to B busH X IsolationPlease be aware that an important notice concerning availability,standard warranty,and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.DIROEA1B1To Seven Other ChannelsAbsolute Maximum Ratings (1)SN74LVC4245AOCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTSSCAS375H–MARCH 1994–REVISED MARCH 2005LOGIC DIAGRAM (POSITIVE LOGIC)over operating free-air temperature range for V CCA =4.5V to 5.5V (unless otherwise noted)MINMAX UNIT V CCA Supply voltage range –0.5 6.5V A port (2)–0.5V CCA +0.5V I Input voltage range V Control inputs –0.56V O Output voltage range A port (2)–0.5V CCA +0.5V I IK Input clamp current V I <0–50mA I OK Output clamp current V O <0–50mA I OContinuous output current±50mA Continuous current through each V CCA or GND±100mADB package63θJA Package thermal impedance (3)DW package 46°C/W PW package88T stg Storage temperature range–65150°C (1)Stresses beyond those listed under "absolute maximum ratings"may cause permanent damage to the device.These are stress ratings only,and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions"is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2)This value is limited to 6V maximum.(3)The package thermal impedance is calculated in accordance with JESD 51-7.Absolute Maximum Ratings(1) Recommended Operating Conditions(1) Recommended Operating Conditions(1)SN74LVC4245A OCTAL BUS TRANSCEIVER AND3.3-V TO5-V SHIFTERWITH3-STATE OUTPUTSSCAS375H–MARCH1994–REVISED MARCH2005over operating free-air temperature range for VCCB=2.7V to3.6V(unless otherwise noted)MIN MAX UNIT V CCB Supply voltage range–0.5 4.6VV I Input voltage range B port(2)–0.5V CCB+0.5VV O Output voltage range B port(2)–0.5V CCB+0.5VI IK Input clamp current V I<0–50mA I OK Output clamp current V O<0–50mA I O Continuous output current±50mAContinuous current through V CCB or GND±100mADB package63θJA Package thermal impedance(3)DW package46°C/WPW package88T stg Storage temperature range–65150°C (1)Stresses beyond those listed under"absolute maximum ratings"may cause permanent damage to the device.These are stress ratingsonly,and functional operation of the device at these or any other conditions beyond those indicated under"recommended operating conditions"is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2)This value is limited to4.6V maximum.(3)The package thermal impedance is calculated in accordance with JESD51-7.for VCCA=4.5V to5.5VMIN MAX UNIT V CCA Supply voltage 4.5 5.5VV IH High-level input voltage2VV IL Low-level input voltage0.8VV IA Input voltage0V CCA VV OA Output voltage0V CCA VI OH High-level output current–24mA I OL Low-level output current24mA T A Operating free-air temperature–4085°C (1)All unused inputs of the device must be held at the associated V CC or GND to ensure proper device operation.Refer to the TIapplication report,Implications of Slow or Floating CMOS Inputs,literature number SCBA004.for VCCB=2.7V to3.6VMIN MAX UNIT V CCB Supply voltage 2.7 3.6VV IH High-level input voltage V CCB=2.7V to3.6V2VV IL Low-level input voltage V CCB=2.7V to3.6V0.8VV IB Input voltage0V CCB VV OB Output voltage0V CCB VV CCB=2.7V–12I OH High-level output current mAV CCB=3V–24V CCB=2.7V12I OL Low-level output current mAV CCB=3V24T A Operating free-air temperature–4085°C (1)All unused inputs of the device must be held at the associated V CC or GND to ensure proper device operation.Refer to the TIapplication report,Implications of Slow or Floating CMOS Inputs,literature number SCBA004.Electrical Characteristics (1)Electrical Characteristics (1)SN74LVC4245AOCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTSSCAS375H–MARCH 1994–REVISED MARCH 2005over recommended operating free-air temperature range for V CCA =4.5V to 5.5V (unless otherwise noted)PARAMETERTEST CONDITIONSV CCA MIN TYP (2)MAXUNIT4.5V 4.3I OH =–100µA5.5V 5.3V OHV4.5V 3.7I OH =–24mA5.5V 4.74.5V 0.2I OL =100µA5.5V 0.2V OLV 4.5V 0.55I OL =24mA5.5V 0.55I I Control inputs V I =V CCA or GND 5.5V ±1µA I OZ (3)A portV O =V CCA or GND 5.5V ±5µA I CCA V I =V CCA or GND,I O =05.5V 80µA ∆I CCA (4)One input at 3.4V,Other inputs at V CCA or GND5.5V 1.5mA C i Control inputs V I =V CCA or GND Open 5pF C io A port V O =V CCA or GND5V11pF (1)V CCB =2.7V to 3.6V(2)All typical values are measured at V CC =5V,T A =25°C.(3)For I/O ports,the parameter I OZ includes the input leakage current.(4)This is the increase in supply current for each input that is at one of the specified TTL voltage levels,rather than 0V or the associated V CC .over recommended operating free-air temperature range for V CCB =2.7V to 3.6V (unless otherwise noted)PARAMETERTEST CONDITIONSV CCB MIN TYP (2)MAXUNITI OH =–100µA2.7V to3.6V V CC –0.22.7V 2.2V OHI OH =–12mA V3V 2.4I OH =–24mA 3V 2I OL =100µA2.7V to3.6V0.2V OL I OL =12mA 2.7V 0.4VI OL =24mA 3V 0.55I OZ (3)B portV O =V CCB or GND 3.6V ±5µA I CCB V I =V CCB or GND,I O =03.6V 50µA ∆I CCB (4)One input at V CCB –0.6V,Other inputs at V CCB or GND2.7V to3.6V0.5mA C io B port V O =V CCB or GND3.3V11pF (1)V CCA =5V ±0.5V(2)All typical values are measured at V CC =3.3V,T A =25°C.(3)For I/O ports,the parameter I OZ includes the input leakage current.(4)This is the increase in supply current for each input that is at one of the specified TTL voltage levels,rather than 0V or the associated V CC .Switching CharacteristicsOperating Characteristics Power-Up Considerations(1)SN74LVC4245A OCTAL BUS TRANSCEIVER AND3.3-V TO5-V SHIFTERWITH3-STATE OUTPUTSSCAS375H–MARCH1994–REVISED MARCH2005over recommended operating free-air temperature range,CL=50pF(unless otherwise noted)(see Figure1and Figure2)V CCA=5V±0.5V,FROM TO VCCB =2.7V to3.6VPARAMETER UNIT(INPUT)(OUTPUT)MIN MAXt PHL1 6.3A B nst PLH1 6.7t PHL1 6.1B A nst PLH15t PZL19OE A ns t PZH18.1t PZL18.8OE B ns t PZH19.8t PLZ17OE A ns t PHZ1 5.8t PLZ17.7OE B ns t PHZ17.8V CCA =4.5V to5.5V,VCCB=2.7V to3.6V,TA=25°CPARAMETER TEST CONDITIONS TYP UNITOutputs enabled39.5C pd Power dissipation capacitance per transceiver C L=0,f=10MHz pFOutputs disabled5TI level-translation devices offer an opportunity for successful mixed-voltage signal design.A proper power-up sequence always should be followed to avoid excessive supply current,bus contention,oscillations,or other anomalies caused by improperly biased device pins.Take these precautions to guard against such power-up problems:1.Connect ground before any supply voltage is applied.2.Power up the control side of the device(V CCA for all four of these devices).3.Tie OE to V CCA with a pullup resistor so that it ramps with V CCA.4.Depending on the direction of the data path,DIR can be high or low.If DIR high is needed(A data to B bus),ramp it with V CCA.Otherwise,keep DIR low.(1)Refer to the TI application report,Texas Instruments Voltage-Level-Translation Devices,literature number SCEA021.PARAMETER MEASUREMENT INFORMATIONFrom Output Under TestC LLOAD CIRCUIT × V CCOpen VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NONINVERTING OUTPUTSV OHVOLOutput ControlOutput Waveform 1S1 at 2 × VCC (see Note B)Output Waveform 2S1 at GND (see Note B)V OLV OH V CC0 V≈0 V3 VVOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLINGOutputt PLH /t PHL t PLZ /t PZL t PHZ /t PZHOpen 2 × V CC GNDTEST S1NOTES: A.C L includes probe and jig capacitance.B.Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.C.All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z O = 50 Ω, t r ≤ 2.5 ns, t f ≤ 2.5 ns.D.The outputs are measured one at a time, with one transition per measurement.E.All parameters and waveforms are not applicable to all devices.V CC0 V InputV CC0 VInputVOLTAGE WAVEFORMS PULSE DURATIONSN74LVC4245AOCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTSSCAS375H–MARCH 1994–REVISED MARCH 2005A PORTFigure 1.Load Circuit and Voltage WaveformsPARAMETER MEASUREMENT INFORMATIONFrom Output Under TestC LLOAD CIRCUIT Open VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NONINVERTING OUTPUTSV OHV OLOutputControlOutput Waveform 1S1 at 7 V (see Note B)Output Waveform 2S1 at GND (see Note B)V OLV OH 3.5 V0 V≈0 V3 VVOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLINGOutputt PLH /t PHL t PLZ /t PZL t PHZ /t PZHOpen 7 V GNDTEST S1NOTES: A.C L includes probe and jig capacitance.B.Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.C.All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z O = 50 Ω, t r ≤ 2.5 ns, t f ≤ 2.5 ns.D.The outputs are measured one at a time, with one transition per measurement.E.All parameters and waveforms are not applicable to all devices.3 V0 V Input3 V0 VInputVOLTAGE WAVEFORMS PULSE DURATIONSN74LVC4245AOCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTERWITH 3-STATE OUTPUTSSCAS375H–MARCH 1994–REVISED MARCH 2005B PORTFigure 2.Load Circuit and Voltage WaveformsPACKAGING INFORMATIONOrderable Device Status(1)PackageType PackageDrawingPins PackageQtyEco Plan(2)Lead/Ball Finish MSL Peak Temp(3)SN74LVC4245ADBR ACTIVE SSOP DB242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADBRE4ACTIVE SSOP DB242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADBRG4ACTIVE SSOP DB242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADW ACTIVE SOIC DW2425Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADWE4ACTIVE SOIC DW2425Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADWG4ACTIVE SOIC DW2425Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADWR ACTIVE SOIC DW242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADWRE4ACTIVE SOIC DW242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245ADWRG4ACTIVE SOIC DW242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APW ACTIVE TSSOP PW2460Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWE4ACTIVE TSSOP PW2460Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWG4ACTIVE TSSOP PW2460Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWR ACTIVE TSSOP PW242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWRE4ACTIVE TSSOP PW242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWRG4ACTIVE TSSOP PW242000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWT ACTIVE TSSOP PW24250Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWTE4ACTIVE TSSOP PW24250Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMSN74LVC4245APWTG4ACTIVE TSSOP PW24250Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIM(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 /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 all6substances,including the requirement that lead not exceed0.1%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 either1)lead-based flip-chip solder bumps used between the die andpackage,or2)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 exceed0.1%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 SN74LVC4245A:•Enhanced Product:SN74LVC4245A-EPNOTE:Qualified Version Definitions:•Enhanced Product-Supports Defense,Aerospace and Medical ApplicationsTAPE AND REELINFORMATION*All dimensionsare nominalDevicePackage Type Package Drawing Pins SPQReel Diameter (mm)Reel Width W1(mm)A0(mm)B0(mm)K0(mm)P1(mm)W (mm)Pin1Quadrant SN74LVC4245ADBR SSOP DB 242000330.016.48.28.8 2.512.016.0Q1SN74LVC4245ADWR SOIC DW 242000330.024.410.7515.7 2.712.024.0Q1SN74LVC4245APWRTSSOPPW242000330.016.46.958.31.68.016.0Q1PACKAGE MATERIALS INFORMATION11-Mar-2008*All dimensionsare nominal DevicePackage Type Package Drawing Pins SPQ Length (mm)Width (mm)Height (mm)SN74LVC4245ADBRSSOP DB 242000346.0346.033.0SN74LVC4245ADWRSOIC DW 242000346.0346.041.0SN74LVC4245APWR TSSOP PW 242000346.0346.033.0PACKAGE MATERIALS INFORMATION 11-Mar-2008Pack Materials-Page 2IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries(TI)reserve the right to make corrections,modifications,enhancements,improvements, and other changes to its products and services at any time and to discontinue any product or service without notice.Customers should obtain the latest relevant information before placing orders 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