元器件交易网www.cecb2b.com OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGESN74LVCC4245SCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997AND 3-STATE OUTPUTSDEPIC™ (Enhanced-Performance ImplantedDB, DW, OR PW PACKAGECMOS) Submicron Process(TOP VIEW)DTypical VOLP (Output Ground Bounce)< 0.8 V at VVCCA124VCCBDCC = 3.3 V, TA = 25°CTypical VDIR223NC> 2 V at VOHV (Output V = 3.3 V, TOH Undershoot)A1322OEDCCA = 25°CA2421B1Package Options Include PlasticA3520B2Small-Outline (DW), Shrink Small-OutlineA4619B3(DB), and Thin Shrink Small-Outline (PW)A5718B4PackagesA6817B5descriptionA7916B6A81015B7This 8-bit (octal) noninverting bus transceiverGND1114B8 contains two separate supply rails. The A port hasGND1213GNDVCCA, which is set at 5 V, and the B port isdesigned to track VCCB, which accepts voltagesfrom 3 V to 5 V. This allows for translation from a3.3-V to a 5-V environment and vice versa.The SN74LVCC4245 is designed for asynchronous communication between data buses. The device transmitsdata from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at thedirection-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses areeffectively isolated.The SN74LVCC4245 is characterized for operation from –40°C to 85°C.FUNCTION TABLEINPUTSOEDIROPERATIONLLB data to A busLHA data to B busHXIsolationPlease be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.EPIC is a trademark of Texas Instruments Incorporated.PRODUCT PREVIEW information concerns products in the formative orCopyright © 1997, Texas Instruments Incorporateddesign phase of development. Characteristic data and otherspecifications are design goals. Texas Instruments reserves the right tochange or discontinue these products without notice.POST OFFICE BOX 655303 • DALLAS, TEXAS 752651PRODUCT PREVIEW元器件交易网www.cecb2b.comSN74LVCC4245OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGEAND 3-STATE OUTPUTSSCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997 logic diagram (positive logic)DIR222OEA1321B1To Seven Other Channelsabsolute maximum ratings over operating free-air temperature range (unless otherwise noted)†Supply voltage range, VCCA and VCCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6 VInput voltage range, VI (see Note 1):I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 to VCC + 0.5 VExcept I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 to VCCA + 0.5 VOutput voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 to VCC + 0.5 VInput clamp current, IIK (VI < 0 or VI > VCC) –50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . mAOutput clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mAContinuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mAContinuous current through VCCA, VCCB, or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mAPackage thermal impedance, θJA (see Note 2):DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104°C/WDW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/WPW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/WStorage temperature range, Tstg –65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . °C to 150°C†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfunctional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is notimplied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.NOTES:1.This value is limited to 6 V maximum.2.The package thermal impedance is calculated in accordance with EIA/JEDEC Std JESD51.PRODUCT PREVIEW2POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN74LVCC4245OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGEAND 3-STATE OUTPUTSSCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997recommended operating conditions (see Note 2)VCCAVCCAVCCBVIHASupply voltageSupply voltageHigh-level input voltageHighlliplgVO ≤ 0.1 V,01VVO ≥ VVCCA – 0.1 V01V45V4.5 V5.5 VVIHBHigh-level input voltageHighlliplgVO ≤ 0.1 V,01VVO ≥ VVCCB – 0.1 V01V45V4.5 V5.5 VVILALow-level input voltageLlliplgVO ≤ 0.1 V,01VVO ≥ VVCCA – 0.1 V01V45V4.5 V5.5 VVILBVIAVIBVOAVOBIOHAIOHBIOLAIOLB∆t/∆vLLow-level input voltagelliplgInput voltageInput voltageOutput voltageOutput voltageHigh-leveloutputcurrentHigh-level output currentHigh-leveloutputcurrentHigh-level output currentLow-leveloutputcurrentLow-level output currentLow-leveloutputcurrentLow-level output currentInput transition rise or fall rate4.5 V5 V5V5 V4.5 V5 V5V5 V3 V3 V2.7 V3 V3 V3 V2.7 V3 V0–40VO ≤ 0.1 V,01VVO ≥ VVCCB – 0.1 V01V45V4.5 V5.5 V2.7 V3.6 V5.5 V2.7 V3.6 V5.5 V2.7 V3.6 V5.5 V2.7 V3.6 V5.5 V0000VCCBMIN4.52.7222223.850.80.80.80.80.81.65VVVmAmAmAmAns/V°CVCCAVCCBVCCAVCCB–12–24–12–24122412241085VVVVVNOM53.3MAX5.55.5UNITVVTAOperating free-air temperatureNOTE 3:Unused pins (input or I/O) must be held high or low to prevent them from floating.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•3PRODUCT PREVIEW元器件交易网www.cecb2b.comSN74LVCC4245OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGEAND 3-STATE OUTPUTSSCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997 electrical characteristics over recommended operating free-air temperature range (unlessotherwise noted)PARAMETERVOHAIOH = –100 µAIOH = –24 mAIOH = –100 µA=–12mAIOH = –12 mAVOHBIOH = –24 mA24AIOL = 100 µAIOL = 24 mAIOL = 100 µAIOL = 12 mAVOLBIOL = 24 mA24A4.5 V45V4.5 V45V4.5 V4.5 V4.5 V4.5 VTEST CONDITIONSVCCA4.5 V4.5 V4.5 V45V4.5 VVCCB3 V3 V3 V2.7 V3 V2.7 V3 V4.5 VVOLA3 V3 V3 V2.7 V2.7 V3 V4.5 VIIIOZ†ICCAControlpinsControl pinsA or B portsB to ABAVI = V=VCCA or GNDorGNDVO = VCC or GND,An = VCC or GND=VCCA or GND,orGNDAn = VAn = V=VCCA or GND,orGNDVI = VIL or VIH55V5.5 V5.5 V5.5 V=VCCB or GNDorGNDBn = VBn = V=VCCB or GNDorGND55V5.5 V55V5.5 V5.5 V5.5 V5.5 V5.5 VOpen5 V3.6 V5.5 V3.6 VOpen3.6 V5.5 V3.6 V5.5 V5.5 V5.5 V3.6 V3.6 VOpen3.3 V0.110.220.210.18±0.1±0.1±0.5888581.35110.354.5100.21MIN4.43.762.252.22.4622.253.76TYP4.494.252.652.52.852.12.654.250.10.440.10.440.50.440.44±1±1±580808050801.51.51.50.5mApFpFmAAµAµAµAµAVVVMAXUNITVPRODUCT PREVIEW4ICCBAtoBA to BA portVI = VCCA – 2.1 V, Other inputs at VCCA or GND,OE at GND and DIR at VCCAVI = VCCA – 2.1 V, Other inputs at VCCA or GND,DIR at VCCA or GNDVI = VCCA – 2.1 V, Other inputs at VCCA or GND,OE at VCCA or GNDVI = VCCB – 0.6 V, Other inputs at VCCB or GND,OE at GND and DIR at VCCBVI = VCCA or GNDVO = VCCA or GND∆ICCA‡OEDIR∆ICCB‡CiCioB portControl inputsA or B ports†For I/O ports, the parameter IOZ includes the input leakage current.‡This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCCB.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN74LVCC4245OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGEAND 3-STATE OUTPUTSSCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997switching characteristics over recommended operating free-air temperature range, CL = 50 pF(unless otherwise noted) (see Figure 1)PARAMETERtPHLtPLHtPHLtPLHtPZLtPZHtPZLtPZHtPLZtPHZtPLZtPHZtsk(o)§FROM(INPUT)ABOEOEOEOEData or outputTO(OUTPUT)BAABABOutputVCCA = 5 V ± 0.5 V,VCCA = 5 V ± 0.5 V,VCCB = 5 V ± 0.5 VVCCB = 2.7 V TO 3.6 VMINTYP†MAXMINTYP‡MAX1111111111114.944.73.97.46.15.65.72.93.43.84.817675.5108.5885667.51.51111111111115.555..386.36.76.92.93.44.26187.586.511810105.5679.51.5UNITnsnsnsnsnsnsns†Typical values are at TA = 25°C, VCCA = 5 V, and VCCB = 5 V.‡Typical values are at TA = 25°C, VCCA = 5 V, and VCCB = 3.3 V.§Skew is the difference in the propagation delay of any two outputs of the same device. This parameter is ensured by design.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•5PRODUCT PREVIEW元器件交易网www.cecb2b.comSN74LVCC4245OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGEAND 3-STATE OUTPUTSSCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997 PARAMETER MEASUREMENT INFORMATION FOR B PORT (SEE NOTE E)2 × VCCFrom OutputUnder TestCL = 50 pF(see Note A)500 ΩS1OpenGND500 ΩTESTtPLH/tPHLtPLZ/tPZLtPHZ/tPZHS1Open2 × VCCOpenLOAD CIRCUITtwB-PortInputVCC50% VCC50% VCC0 VVOLTAGE WAVEFORMSPULSE DURATIONOutputControltPZLVCCInputtPLHB-PortOutput50% VCC50% VCC1.5 V1.5 V0 VtPHLVOHVOLVOLTAGE WAVEFORMSPROPAGATION DELAY TIMESNONINVERTING OUTPUTSOutputWaveform 1S1 at 2 × VCC(see Note B)OutputWaveform 2S1 at Open(see Note B)tPLZ50% VCCtPZH50% VCCtPHZVOH – 0.3 VVOH[ 0 VVCCVOL + 0.3 VVOL1.5 V1.5 V0 V3 VPRODUCT PREVIEWVOLTAGE WAVEFORMSENABLE AND DISABLE TIMESLOW- AND HIGH-LEVEL ENABLINGNOTES:A.CL 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.Waveform2 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, ZO = 50 Ω, tr ≤ 2.5 ns, tf≤ 2.5 ns.D.The outputs are measured one at a time with one transition per measurement.E.This is to test the B port, with VCCA = 5.5 V and VCCB = 5.5 V.Figure 1. Load Circuit and Voltage Waveforms6POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN74LVCC4245OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGEAND 3-STATE OUTPUTSSCAS584A – NOVEMBER 1996 – REVISED JANUARY 1997PARAMETER MEASUREMENT INFORMATION FOR A AND B PORT (SEE NOTE E)7 VFrom OutputUnder TestCL = 50 pF(see Note A)500 ΩS1OpenGND500 ΩTESTtPLH/tPHLtPLZ/tPZLtPHZ/tPZHS1Open7 VOpenLOAD CIRCUITtw3 VInput1.5 V1.5 V0 VVOLTAGE WAVEFORMSPULSE DURATION3 VInputtPLHOutput1.5 V1.5 V1.5 V0 VtPHLVOH1.5 VVOLVOLTAGE WAVEFORMSPROPAGATION DELAY TIMESNONINVERTING OUTPUTSOutputControltPZLOutputWaveform 1S1 at 7 V(see Note B)OutputWaveform 2S1 at Open(see Note B)tPZHtPLZ1.5 VtPHZVOH – 0.3 VVOH[ 0 VVOLTAGE WAVEFORMSENABLE AND DISABLE TIMESLOW- AND HIGH-LEVEL ENABLING3.5 VVOL + 0.3 VVOL1.5 V1.5 V0 V3 V1.5 VNOTES:A.CL 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.Waveform2 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, ZO = 50 Ω, tr ≤ 2.5 ns, tf≤ 2.5 ns.D.The outputs are measured one at a time with one transition per measurement.E.This is to test the A and B ports, with VCCA = 5.5 V and VCCB = 3.6 V.Figure 2. Load Circuit and Voltage WaveformsPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•7PRODUCT PREVIEW元器件交易网www.cecb2b.com
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