元器件交易网www.cecb2b.com SN75ALS174AQUADRUPLE DIFFERENTIAL LINE DRIVER SLLS122E – JULY 1991 – REVISED APRIL 1998DMeets or Exceeds the Requirements ofDDDDDDDDDANSI EIA/TIA-422-B and RS-485High-Speed Advanced Low-Power SchottkyCircuitryDesigned for up to 20-Mbit/s Operation inBoth Serial and Parallel ApplicationsDesigned for Multipoint Transmission onLong Bus Lines in Noisy EnvironmentsLow Supply Current Requirements55 mA MaxWide Positive and Negative Input/OutputBus Voltage RangesDriver Output Capacity...±60 mAThermal-Shutdown ProtectionDriver Positive- and Negative-CurrentLimitingFunctionally Interchangeable With SN75174N PACKAGE(TOP VIEW)1A1Y1Z1,2EN2Z2Y2AGND12345678161514131211109VCC4A4Y4Z3,4EN3Z3Y3ADW PACKAGE(TOP VIEW)descriptionThe SN75ALS174A is a quadruple line driver with3-state differential outputs. It is designed to meetthe requirements of ANSI StandardsEIA/TIA-422-B and RS-485. This device isoptimized for balanced multipoint bustransmission at rates of up to 20 Mbit/s. Eachdriver features wide positive and negativecommon-mode output voltage ranges that makethem suitable for party-line applications in noisyenvironments.1A1YNC1Z1,2EN2ZNC2Y2AGND12345671020191817161514131211VCC4A4YNC4Z3,4EN3ZNC3Y3ANC – No internal connectionThe SN75ALS174A provides positive- and negative-current limiting and thermal shutdown for protection fromline fault conditions on the transmission bus line. Shutdown occurs at a junction temperature ofapproximately 150°C.The SN75ALS174A is characterized for operation from 0°C to 70°C.FUNCTION TABLE(each driver)INPUTAHLXENABLESHHLOUTPUTSYHLZZLHZH = high level, L = low level, X = irrelevant,Z = high impedance (off)Please 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.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 © 1998, Texas Instruments IncorporatedPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•1元器件交易网www.cecb2b.comSLLS122E – JULY 1991 – REVISED APRIL 1998SN75ALS174AQUADRUPLE DIFFERENTIAL LINE DRIVER logic symbol†1,2EN4EN2362A751Y1Z2Y2Z 1A13,4EN12EN1011143Y3Z4Y4Z3A94A1513†This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.Pin numbers shown are for the N package.logic diagram (positive logic)1,2EN423651A11Y1Z2Y2Z2A73,4EN12101114133A93Y3Z4Y4Z4APin numbers shown are for the N package.152POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN75ALS174AQUADRUPLE DIFFERENTIAL LINE DRIVER SLLS122E – JULY 1991 – REVISED APRIL 1998schematics of inputs and outputsEQUIVALENT OF EACH INPUTVCC35 kΩ NOMTYPICAL OF ALL OUTPUTSVCCInputOutputGNDabsolute maximum ratings over operating free-air temperature range (unless otherwise noted)†Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 VInput voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 VOutput voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –9 V to 14 VContinuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating TableStorage temperature range, Tstg –65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . °C to 150°CLead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°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.NOTE 1:All voltage values are with respect to network GND.DISSIPATION RATING TABLEPACKAGEDWNTA ≤ 25°CPOWER RATING1125 mW1150 mWDERATINGFACTOR9.0 mW/°C9.2 mW/°CTA = 70°CPOWER RATING720 mW736 mWTA = 85°CPOWER RATING585 mW598 mWrecommended operating conditionsMINSupply voltage, VCCHigh-level input voltage, VIHLow-level input voltage, VILCommon-mode output voltage, VOCHigh-level output current, IOHLow-level output current, IOLOperating free-air temperature, TA04.7520.812–7–606070NOM5MAX5.25UNITVVVVmAmA°CPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•3元器件交易网www.cecb2b.comSLLS122E – JULY 1991 – REVISED APRIL 1998SN75ALS174AQUADRUPLE DIFFERENTIAL LINE DRIVER electrical characteristics over recommended ranges of supply voltage and operating free-airtemperature (unless otherwise noted)PARAMETERVIKVO|VOD1||VOD2||VOD3|∆|VOD|VOC∆|VOC|IOIOZIIHIILIOSICCInput clamp voltageOutput voltageDifferential output voltageDifferential output voltagegDifferential output voltageChange in magnitude ofdifferential output voltage§Common-mode output voltage¶Change in magnitude ofcommon-mode output voltage§Output current with power offHigh-impedance-state output currentHigh-level input currentLow-level input currentShort-circuit output currentSupplycurrent(alldrivers)Supply current (all drivers)II = –18 mAIO = 0IO = 0RL = 100 ΩRL = ΩSee Note 2RL = Ω or 100 Ω,RL = Ω or 100 Ω,RL = Ω or 100 Ω,VCC = 0,VO = –7 V to 12 VVI = 2.7 VVI = 0.4 VVO = –7 V to 12 VNoloadNo loadOutputs enabledOutputs disabled3616See Figure 1See Figure 1See Figure 1VO = –7 V to 12 VSee Figure 1gTEST CONDITIONSMIN01.51/2VOD1or 2‡1.51.52.555±0.23–1±0.2±100±10020–100±2505530VVVVµAµAµAµAmAmATYP†MAX–1.566UNITVVVV†All typical values are at VCC = 5 V and TA = 25°C.‡The minimum VOD2 with a 100-Ω load is either 1/2 VOD1 or 2 V, whichever is greater.§∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a lowlevel.¶In ANSI Standard EIA/TIA-422-B, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage,VOS.NOTE 2:See EIA Standard RS-485, Figure 3-5, Test Termination Measurement 2.switching characteristics over recommended ranges of supply voltage and operating free-airtemperature, CL = 50 pFPARAMETERtd(OD)tPZHtPZLtPHZDifferential output delay timeOutput enable time to high levelOutput enable time to low levelOutput disable time from high levelTEST CONDITIONSRL = Ω,RL = 110 Ω,RL = 110 Ω,RL = 110 Ω,RL = 110 Ω,See Figure 2See Figure 3See Figure 4See Figure 3See Figure 4MIN930251010TYP†102030MAX22706535UNITnsnsnsnsnstPLZOutput disable time from low level†All typical values are at VCC = 5 V and TA = 25°C.4POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com SN75ALS174AQUADRUPLE DIFFERENTIAL LINE DRIVER SLLS122E – JULY 1991 – REVISED APRIL 1998PARAMETER MEASUREMENT INFORMATIONRL2VOD2RL2VOCFigure 1. Differential and Common-Mode Output VoltagesYCLGenerator(see Note A)50 Ω3 VRL = ΩZCL = 50 pF(see Note B)TEST CIRCUIT3 VInput0 V1.5 Vtd(ODH)1.5 Vtd(ODL)Output ZOutput YVOLTAGE WAVEFORMSNOTES:A.The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, duty cycle = 50%, tf ≤ 5 ns,tr ≤ 5 ns.B.CL includes probe and stray capacitance.Figure 2. Differential-Output Test Circuit and Delay and Transition Times Voltage WaveformsOutput0 V or 3 VS1CL = 50 pF(see Note B)Input3 V1.5 VtPZH1.5 V0 V0.5 VVOH2.3 VtPHZVoff ≈0 VGenerator(see Note A)RL = 110 ΩOutput50 ΩTEST CIRCUITVOLTAGE WAVEFORMSNOTES:A.The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, duty cycle = 50%, tf ≤ 5 ns,tr ≤ 5 ns.B.CL includes probe and stray capacitance.Figure 3. Test Circuit and Voltage Waveforms, tPZH and tPHZPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•5元器件交易网www.cecb2b.comSLLS122E – JULY 1991 – REVISED APRIL 1998SN75ALS174AQUADRUPLE DIFFERENTIAL LINE DRIVER PARAMETER MEASUREMENT INFORMATION5 VRL = 110 Ω0 V or 3 VS1CL = 50 pF(see Note B)OutputOutputInput1.5 VtPZL2.3 V1.5 V0 VtPLZ5 VVOL0.5 VTEST CIRCUITVOLTAGE WAVEFORMS3 V Generator(see Note A)50 ΩNOTES:A.The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, duty cycle = 50%, tf ≤ 5 ns,tr ≤ 5 ns.B.CL includes probe and stray capacitance.Figure 4. Test Circuit and Voltage Waveforms, tPZL and tPLZ6POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com
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