元器件交易网www.cecb2b.com SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTSSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997DB-Port Outputs Have Equivalent 25-ΩDDDDDDSeries Resistors, So No External ResistorsAre RequiredState-of-the-Art EPIC-ΙΙB™ BiCMOS DesignSignificantly Reduces Power DissipationLatch-Up Performance Exceeds 500 mA PerJEDEC Standard JESD-17ESD Protection Exceeds 2000 V PerMIL-STD-833, Method 3015; Exceeds 200 VUsing Machine Model (C = 200 pF, R = 0)Typical VOLP (Output Ground Bounce) < 1 Vat VCC = 5 V, TA = 25°CHigh-Impedance State During Power Upand Power DownPackage Options Include PlasticSmall-Outline (DW), Shrink Small-Outline(DB), and Thin Shrink Small-Outline (PW)Packages, Ceramic Chip Carriers (FK),Plastic (N) and Ceramic (J) DIPs, andCeramic Flat (W) PackageSN54ABT2245...J OR W PACKAGESN74ABT2245...DB, DW, N, OR PW PACKAGE(TOP VIEW)DIRA1A2A3A4A5A6A7A8GND1234567891020191817161514131211VCCOEB1B2B3B4B5B6B7B8 SN54ABT2245...FK PACKAGE(TOP VIEW)A2A1DIRVCCA3A4A5A6A74567832120191817161514910111213OEB1B2B3B4B5descriptionThese octal transceivers and line drivers aredesigned for asynchronous communicationbetween data buses. The devices transmit datafrom the A bus to the B bus or from the B bus tothe A bus, depending on the logic level at thedirection-control (DIR) input. The output-enable(OE) input can be used to disable the device sothe buses are effectively isolated.The B-port outputs, which are designed to sink up to 12 mA, include equivalent 25-Ω series resistors to reduceovershoot and undershoot.When VCC is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.However, to ensure the high-impedance state above 2.1 V, OE should be tied to VCC through a pullup resistor;the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver.The SN54ABT2245 is characterized for operation over the full military temperature range of –55°C to 125°C.The SN74ABT2245 is characterized for operation from –40°C to 85°C.FUNCTION TABLEINPUTSOELLHDIRLHXOPERATIONB data to A busA data to B busIsolationPlease 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-ΙΙB is a trademark of Texas Instruments Incorporated.PRODUCTION DATA information is current as of publication date.Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily includetesting of all parameters.Copyright © 1997, Texas Instruments IncorporatedPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•A8GNDB8B7B61元器件交易网www.cecb2b.comSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTSlogic symbol†OEDIR191G33 EN1 [BA]3 EN2 [AB]1218B1 A12A2A3A4A5A6A7A8345678917161514131211B2B3B4B5B6B7B8†This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.logic diagram (positive logic)DIR119OEA1218B1To Seven Other Channels2POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTSSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997schematic of A-port outputsVCCschematic of B-port outputsVCCOutput25 ΩOutputGNDAll resistor values shown are nominal.GNDabsolute maximum ratings over operating free-air temperature range (unless otherwise noted)†Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 VInput voltage range, VI (except I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 VVoltage range applied to any output in the high or power-off state, VO . . . . . . . . . . . . . . . . . . . –0.5 V to 5.5 VCurrent into any output in the low state, IO:SN54ABT2245 (except B port) . . . . . . . . . . . . . . . . . . . . . . 96 mASN74ABT2245 (except B port). . . . . . . . . . . . . . . . . . . . . 128 mAB port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mAInput clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –18 mAOutput clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mAPackage thermal impedance, θJA (see Note 2):DB package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115°C/WDW package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/WN package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/WPW package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128°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.The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.2.The package thermal impedance is calculated in accordance with EIA/JEDEC Std JESD51, except for through-hole packages,which use a trace length of zero.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•3元器件交易网www.cecb2b.comSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTSrecommended operating conditions (see Note 3)SN54ABT2245MINVCCVIHVILVIIOHIOL∆t/∆v∆t/∆VCCSupply voltageHigh-level input voltageLow-level input voltageInput voltageHighleveloutputcurrentHigh-level output currentLowleveloutputcurrentLow-level output currentInput transition rise or fall ratePower-up ramp rateA portB portA portB portOutputs enabled200–5512504.520.8VCC–24–1248125200–40850MAX5.5SN74ABT2245MIN4.520.8VCC–32–1264125MAX5.5UNITVVVVmAmAns/Vµs/V°C TAOperating free-air temperatureNOTE 3:Unused pins (input or I/O) must be held high or low to prevent them from floating.4POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTSSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997electrical characteristics over recommended operating free-air temperature range (unlessotherwise noted)PARAMETERVIKTESTCONDITIONSTEST CONDITIONSVCC = 4.5 V,VCC = 4.5 V,BportB portVOHAportA portVCC = 5 V,VCC = 4.5 V=45VVCC = 4.5 V,VCC = 5 V,=45VVCC = 4.5 VBportB portVOLAportA portVhysControl inputsIIIOZH‡IOZL‡IOZPU§IOZPD§IoffICEXIO¶A or B portsVCC = 0 to 5.5 V, VI = VCC or GNDVCC = 2.1 V to 5.5 V,VI = VCC or GNDVCC = 2.1 V to 5.5 V,VO = 2.7 V, OE ≥ 2 VVCC = 2.1 V to 5.5 V,VO = 0.5 V, OE ≥ 2 VVCC = 0 to 2.1 V,VO = 0.5 V to 2.7 V, OE = XVCC = 2.1 V to 0, VO = 0.5 V to 2.7 V, OE = XOutputs highB portA portA or B portsVCC = 0,VCC = 5.5 V,VCC = 5.5 V,=55VVCC = 5.5 V,=5.5V,IO = 0,VI = VCC or GNDVI or VO ≤ 4.5 VVO = 5.5 VVO = 2.5 V=25VOutputs highOutputs lowOutputs disabled–25–50–1001240.5VCC = 4.5 V=45VII = –18 mAIOH = –1 mAIOH = –1 mAIOH = –3 mAIOH = –12 mAIOH = –3 mAIOH = –3 mAIOH = –24 mAIOH = –32 mAIOL = 8 mAIOL = 12 mAIOL = 48 mAIOL = 64 mA100±1±2010–10±50±50±10050–100–180250322501.50.051.536–25–5050–100–180250322501.50.051.5–25–50±1±2010–10±50±50±1±2010–10±50±50±10050–100–180250322501.50.051.5pFpFmAµATA = 25°CMINTYP†MAX–1.23.353.852.62.5322*0.650.80.550.55*0.550.55mV0.82.53220.650.8V3.33.83SN54ABT2245MINMAX–1.23.353.853.12.62.53VSN74ABT2245MINMAX–1.2UNITVµAµAµAµAµAµAmAµAmAµAICCDatainputsData inputs∆ICC#Control inputsCiCioVCC = 5.5 V,Outputs enabledOne input at 3.4 V,,Other inputs atOutputs disabledVCC or GNDVCC = 5.5 V, One input at 3.4 V,Other inputs at VCC or GNDVI = 2.5 V or 0.5 VVO = 2.5 V or 0.5 V* On products compliant to MIL-PRF-38535, this parameter does not apply.†All typical values are at VCC = 5 V.‡The parameters IOZH and IOZL include the input leakage current.§This parameter is characterized but not production tested.¶Not more than one output should be tested at a time, and the duration of the test should not exceed one second.#This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•5元器件交易网www.cecb2b.comSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTS switching characteristics over recommended ranges of supply voltage and operating free-airtemperature, CL = 50 pF (unless otherwise noted) (see Figure 1)PARAMETERtPLHtPHLtPLHtPHLtPZHtPZLtPHZtPLZtPZHtPZLtPHZtPLZFROM(INPUT)ABOEOETO(OUTPUT)BAAABBVCC = 5 V,TA = 25°CMIN111111211.51.51.51.5TYP2.53.22.22.73.33.242.93.63.93.63.3MAX3.44.23.23.64.64.75.144.95.34.74.4SN54ABT2245MIN111111211.51.51.51.5MAX44.63.84.25.665.74.66.36.65.54.9SN74ABT2245MIN111111211.51.51.51.5MAX3.84.53.645.55.75.64.56.16.35.34.8nsnsnsnsnsnsUNITOEOE6POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN54ABT2245, SN74ABT2245OCTAL TRANSCEIVERS AND LINE/MOS DRIVERSWITH 3-STATE OUTPUTSSCBS234D – SEPTEMBER 1992 – REVISED MAY 1997PARAMETER MEASUREMENT INFORMATION500 ΩS17 VOpenGND500 ΩTESTtPLH/tPHLtPLZ/tPZLtPHZ/tPZHS1Open7 VOpenFrom Output Under TestCL = 50 pF(see Note A)LOAD CIRCUITtw3 VInput1.5 V1.5 V0 VVOLTAGE WAVEFORMSPULSE DURATION3 VInputtPLHOutputtPHLOutput1.5 V1.5 V1.5 V1.5 V0 VtPHL1.5 VtPLHVOH1.5 VVOLVOLTAGE WAVEFORMSPROPAGATION DELAY TIMESINVERTING AND NONINVERTING OUTPUTSVOHVOL3 VTiming Input1.5 V0 VtsuData Input1.5 VVOLTAGE WAVEFORMSSETUP AND HOLD TIMES3 V1.5 VtPZLOutputWaveform 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 ENABLING1.5 V0 Vth3 V1.5 V0 VOutputControl3.5 VVOL + 0.3 VVOL1.5 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.Figure 1. Load Circuit and Voltage WaveformsPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•7元器件交易网www.cecb2b.com
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