DS36276 DS36276 FAILSAFE Multipoint Transceiver Literature Number: SNLS085A

D July1998 S 3 6 2 7 6 DS36276 F A FAILSAFE Multipoint Transceiver I L S General Description Features A TheDS36276FAILSAFEMultipointTransceiverisdesigned n FAILSAFEreceiver,RO=HIGHfor: F for use on bi-directional differential busses. It is compatible —OPENinputs E withexistingTIA/EIA-485transceivers,however,itoffersan —Terminatedinputs M additionalfeaturenotsupportedbystandardtransceivers. —SHORTEDinputs u The FAILSAFE feature guarantees the receiver output to a n Compatiblewithpopularinterfacestandards: l knownstatewhentheInterfaceisinthefollowingconditions: —TIA/EIA-485(RS-485) ti p Floating Line, Idle Line (no active drivers), and Line Fault —TIA/EIA-422-A(RS-422-A) o conditions(openorshort).ThereceiveroutputisinaHIGH —CCITTRecommendationV.11 i stateforthefollowingconditions:OPENInputs,Terminated n Bi-DirectionalTransceiver n Inputs(50W ),andSHORTEDInputs. —Designedformultipointtransmission t T FAILSAFEisahighlydesirablefeaturewhenthetransceiv- n Separatedriverinput,driverenable,receiverenable, r ersareusedwithAsynchronousControllerssuchasUARTs. andreceiveroutputformaximumflexibility a n n Widebuscommonmoderange s —(−7Vto+12V) c n Pincompatiblewith:DS75176B,DS96176,DS3695and e SN75176AandB iv n AvailableinSOICpackage e r Connection and Driver Logic Diagram Inputs Outputs RE DE DI DO/RI DO/RI X H H H L X H L L H X L X Z Z Receiver Inputs Output DS011383-1 RE DE RI–RI RO OrderNumberDS36276M L L ‡ 0V H SeeNSPackageNumberM08A L L £ −500mV L H X X Z Receiver FAILSAFE Inputs Output RE DE RI–RI RO L L SHORTED H L L OPEN H H X X Z TRI-STATE®isaregisteredtrademarkofNationalSemiconductorCorporation. ©2001NationalSemiconductorCorporation DS011383 www.national.com

6 7 2 Absolute Maximum Ratings (Note 1) LeadTemperature(Soldering4 6 3 sec.) 260˚C S If Military/Aerospace specified devices are required, D pleasecontacttheNationalSemiconductorSalesOffice/ MaxJunctionTemperature 150˚C Distributorsforavailabilityandspecifications. ESDRating(HBM,1.5kW ,100 pF) ‡ 6.0kV SupplyVoltage(V ) 7V CC InputVoltage(DE,RE,andDI) 5.5V Recommended Operating DriverOutputVoltage/ Conditions ReceiverInputVoltage −10Vto+15V ReceiverOutputVoltage(RO) 5.5V Min Max Units MaximumPackagePowerDissipation @ +25˚C SupplyVoltage,VCC 4.75 5.25 V MPackage BusVoltage −7 +12 V (derate5.8mW/˚Cabove OperatingTemperature(T ) A +25˚C) 726mW DS36276 0 +70 ˚C StorageTemperatureRange −65˚Cto+150˚C Electrical Characteristics (Notes 2, 4) OverrecommendedSupplyVoltageandOperatingTemperatureranges,unlessotherwisespecified. Symbol Parameter Conditions Min Typ Max Units DRIVERCHARACTERISTICS V DifferentialOutputVoltage I =0mA(NoLoad) 1.5 4.8 6.0 V OD O V OutputVoltage I =0mA(OutputtoGND) 0 6.0 V oDO O V OutputVoltage 0 6.0 V oDO V DifferentialOutputVoltage R =54W (485) (Figure1) 1.5 2.0 5.0 V T1 L (TerminationLoad) R =100W (422) 2.0 2.3 5.0 V L D V BalanceofV R =54W (Note3) −0.2 0.07 +0.2 V T1 T1 L |VT1|−|VT1| RL=100W −0.2 0.07 +0.2 V V DriverCommonMode R =54W (Figure1) 0 2.5 3.0 V OS L OutputVoltage R =100W 0 2.3 3.0 V L D V BalanceofV R =54W (Note3) −0.2 0.08 +0.2 V OS OS L |VOS|−|VOS| RL=100W −0.2 0.08 +0.2 V I DriverShort-Circuit V =+12V (Figure3) 134 290 mA OSD O OutputCurrent V =V 140 mA O CC V =0V −140 mA O V =−7V −180 −290 mA O RECEIVERCHARACTERISTICS V DifferentialInputHigh V =V ,I =−0.4mA TH O OH O −0.18 0 V ThresholdVoltage(Note5) −7V£ V £ +12V CM V DifferentialInputLow V =V ,I =8.0mA TL O OL O −0.5 −0.23 V ThresholdVoltage(Note5) −7V£ V £ +12V CM V Hysteresis(Note6) V =0V 50 mV HST CM I LineInputCurrent OtherInput=0V V =+12V 0.7 1.0 mA IN I (VCC=4.75V,5.25V,0V) DE=VIH(Note7) VI=−7V −0.5 −0.8 mA I ShortCircuitCurrent V =0V RO −5.0 −30 −85 mA OSR O I TRI-STATE® LeakageCurrent V =0.4to2.4V −20 +20 µA OZ O V OutputHighVoltage V =0V,I =−0.4mA 2.5 3.5 V OH ID OH (Figure12) V =OPEN,I =−0.4mA 2.5 3.5 V ID OH V OutputLowVoltage V =−0.5V,I =+8mA 0.25 0.6 V OL ID OL (Figure12) V =−0.5V,I =+16mA 0.35 0.7 V ID OL R InputResistance 12 19 kW IN www.national.com 2

D Electrical Characteristics S (Notes 2, 4) (Continued) 3 6 2 OverrecommendedSupplyVoltageandOperatingTemperatureranges,unlessotherwisespecified. 7 6 Symbol Parameter Conditions Min Typ Max Units DEVICECHARACTERISTICS V HighLevelInputVoltage DE, 2.0 V V IH CC V LowLevelInputVoltage RE, GND 0.8 V IL or I HighLevelInputCurrent V =2.4V 20 µA IH IH DI I LowLevelInputCurrent V =0.4V −100 µA IL IL V InputClampVoltage I =−18mA −0.75 −1.5 V CL CL I OutputLowVoltage DE=3V,RE=0V,DI=0V 42 60 mA CC I SupplyCurrent DE=0V,RE=0V,DI=0V 28 45 mA CCR (NoLoad) I DE=3V,RE=3V,DI=0V 43 60 mA CCD I DE=0V,RE=3V,DI=0V 31 50 mA CCX Switching Characteristics (Note 4) OverrecommendedSupplyVoltageandOperatingTemperatureranges,unlessotherwisespecified. Symbol Parameter Conditions Min Typ Max Units DRIVERCHARACTERISTICS t Diff.Prop.DelayLowtoHigh R =54W 7 21 60 ns PLHD L tPHLD Diff.Prop.DelayHightoLow CL=50pF 7 19 60 ns C =50pF t Diff.Skew(|t –t |) D 2 10 ns SKD PLHD PHLD (Figures4,5) t Diff.RiseTime 12 50 ns r t Diff.FallTime 12 50 ns f t Prop.DelayLowtoHigh R =27W ,C =15pF 22 45 ns PLH L L t Prop.DelayHightoLow (Figures6,7) 22 45 ns PHL t EnableTimeZtoHigh R =110W 32 55 ns PZH L tPZL EnableTimeZtoLow CL=50pF 32 65 ns (Figure8–Figure11) t DisableTimeHightoZ 22 55 ns PHZ t DisableTimeLowtoZ 16 55 ns PLZ RECEIVERCHARACTERISTICS t Prop.DelayLowtoHigh V =−1.5Vto+1.5V 15 40 70 ns PLH ID tPHL Prop.DelayHightoLow CL=15pF 15 42 70 ns (Figures13,14) t Skew(|t –t |) 2 15 ns SK PLH PHL t EnableTimeZtoHigh C =15pF 15 50 ns PZH L t EnableTimeZtoLow (Figures15,16) 17 50 ns PZL t DisableTimeHightoZ 24 50 ns PHZ t DisableTimeLowtoZ 19 50 ns PLZ Note1: “AbsoluteMaximumRatings”arethosevaluesbeyondwhichthesafetyofthedevicecannotbeguaranteed.Theyarenotmeanttoimplythatthedevices shouldbeoperatedattheselimits.Thetablesof“ElectricalCharacteristics”specifyconditionsfordeviceoperation. Note2: Currentintodevicepinsisdefinedaspositive.Currentoutofdevicepinsisdefinedasnegative.Allvoltagesarereferencedtogroundunlessotherwise specified. Note3: D |VT1|andD |VOS|arechangesinmagnitudeofVT1andVOS,respectively,thatoccurwhentheinputchangesstate. Note4: AlltypicalsaregivenforVCC=5.0VandTA=+25˚C. Note5: Thresholdparameterlimitsspecifiedasanalgebraicvalueratherthanbymagnitude. Note6: HysteresisdefinedasVHST=VTH−VTL. Note7: IINincludesthereceiverinputcurrentanddriverTRI-STATEleakagecurrent. 3 www.national.com

6 7 2 Parameter Measurement Information 6 3 S D DS011383-2 FIGURE1.DriverV andV TestCircuit T1 OS DS011383-3 FIGURE2.DriverV andV TestCircuit OH OL DS011383-4 FIGURE3.DriverShortCircuitTestCircuit DS011383-5 FIGURE4.DriverDifferentialPropagationDelayandTransitionTimeTestCircuit www.national.com 4

D Parameter Measurement Information S (Continued) 3 6 2 7 6 DS011383-6 FIGURE5.DriverDifferentialPropagationDelaysandTransitionTimes DS011383-7 FIGURE6.DriverPropagationDelayTestCircuit DS011383-8 FIGURE7.DriverPropagationDelays DS011383-9 S1toDOforDI=3V S1toDOforDI=0V FIGURE8.DriverTRl-STATETestCircuit(t ,t ) PZH PHZ 5 www.national.com

6 7 2 Parameter Measurement Information (Continued) 6 3 S D DS011383-10 FIGURE9.DriverTRI-STATEDelays(t ,t ) PZH PHZ DS011383-11 S1toDOforDI=0V S1toDOforDI=3V FIGURE10.DriverTRI-STATETestCircuit(t ,t ) PZL PLZ DS011383-12 FIGURE11.DriverTRl-STATEDelays(t ,t ) PZL PLZ DS011383-13 FIGURE12.ReceiverV andV OH OL DS011383-14 FIGURE13.ReceiverPropagationDelayTestCircuit www.national.com 6

D Parameter Measurement Information S (Continued) 3 6 2 7 6 DS011383-15 FIGURE14.ReceiverPropagationDelays DS011383-16 FIGURE15.ReceiverTRI-STATEDelayTestCircuit DS011383-17 DS011383-18 S11.5V S1−1.5V S2OPEN S2CLOSED S3CLOSED S3OPEN DS011383-19 DS011383-20 S11.5V S1−1.5V S2CLOSED S2CLOSED S3CLOSED S3CLOSED Note8: Theinputpulseissuppliedbyageneratorhavingthefollowingcharacteristics:f=1.0MHz,50%dutycycle,trandtf<6.0ns,ZO=50W . Note9: CLincludesprobeandstraycapacitance. Note10: Diodesare1N916orequivalent. FIGURE16.ReceiverEnableandDisableTiming 7 www.national.com

6 7 2 Typical Performance Characteristics 6 3 S D DifferentialOutputVoltage DifferentialOutputVoltage vsOutputCurrent vsOutputCurrent DS011383-21 DS011383-22 DriverV vsI vsV DriverV vsI vsTemperature OH OH CC OH OH DS011383-23 DS011383-24 DriverV vsI vsV DriverV vsI vsTemperature OL OL CC OL OL DS011383-25 DS011383-26 www.national.com 8

D Typical Performance Characteristics S (Continued) 3 6 2 7 6 ReceiverV vsI vsV ReceiverV vsI vsTemperature OH OH CC OH OH DS011383-27 DS011383-28 ReceiverV vsI vsV ReceiverV vsI vsTemperature OL OL CC OL OL DS011383-29 DS011383-30 SupplyCurrrentvsSupplyVoltage SupplyCurrentvsTemperature DS011383-31 DS011383-32 9 www.national.com

6 7 2 Typical Performance Characteristics (Continued) 6 3 S D VoltageOutputvsVoltageInput (Hysteresis) DS011383-33 www.national.com 10

D Physical Dimensions inches (millimeters) unless otherwise noted S 3 6 2 7 6 F A I L S A F E M u l t i p o i n t T r a n s c e OrderNumberDS36276M i NSPackageNumberM08A v e r LIFESUPPORTPOLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSELOFNATIONALSEMICONDUCTORCORPORATION.Asusedherein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform into the body, or (b) support or sustain life, and can be reasonably expected to cause the failure of whose failure to perform when properly used in the life support device or system, or to affect its accordance with instructions for use provided in the safetyoreffectiveness. labeling, can be reasonably expected to result in a significantinjurytotheuser. NationalSemiconductor NationalSemiconductor NationalSemiconductor NationalSemiconductor Corporation Europe AsiaPacificCustomer JapanLtd. Americas Fax: +49(0)180-5308586 ResponseGroup Tel: 81-3-5639-7560 Email:support@nsc.com Email: europe.support@nsc.com Tel:65-2544466 Fax:81-3-5639-7507 Deutsch Tel: +49(0)6995086208 Fax:65-2504466 English Tel: +44(0)8702402171 Email:ap.support@nsc.com www.national.com FrançaisTel: +33(0)141918790 Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.

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