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________________________________MAX481ĂMAX483ĂMAX485ĂMAX487–MAX491ჾࣆMAX1487กᅋᅢRS-485ᅳRS-422ဳوّޢࠞฏۢಹLj୧ޔಹऔቲڞᅘქޔഝڑಹࠧქޔेฏಹăMAX483ĂMAX487ĂMAX488ჾࣆMAX489ᅘ҈ଔഝڑಹLj৹ჾऋဏEMILjԌऩّᅑԥುصوቷڭ౧ై٫ᄧಲو۴වLj෯ዮݽ250kbpsوྐؓืযבพăMAX481ĂMAX485ĂMAX490ĂMAX491ĂMAX1487وഝڑಹ҈ଔԥถቨLj৹ჾ෯ዮݽ2.5Mbpsوבพଔăሦဗฏۢಹᇀഝڑಹ९ᅋوਅᆾࢪୄᆾኴຢ࿒Ljྮടو٫ᆚ٫ૣᇀ120μAባ500μAቐࣺă༶LjMAX481ĂMAX483ᅳMAX487ᅘّ٫ૣߔڱனLj४ဋࠞ0.1μA٫ૣăຑᅘಹऔڞޠዷᇀ5Vة٫ᆚ࿒ăഝڑಹᅘڮଁ٫ૣቨLjԌ৹ჾ߹െߔڱ٫ଁटഝڑಹพ־ብཛྷݽየኴຢLj܀ቛ߹ڪوޢଔຈࠞăेฏಹพ൩ᅘပү໎၂Ljصพ൩ଁ෫Lj৹ჾവүࣃݽ٫౿พ־ăMAX487ᅳMAX1487ᅘܖቐქةݘᆾوेฏಹพ൩የ৩Ljෳهዜණዮۂ৹ჾᅘ128ޔMAX487/MAX1487ฏۢಹăෳᅋMAX488–MAX491৹ჾ෯ഩใޠဳLjۚMAX481ĂMAX483ĂMAX485ĂMAX487ᅳMAX1487ᇘཛྷҙใޠᄮᅋහࣜă________________________________ّޢࠞRS-485ฏۢಹّޢࠞRS-422ฏۢಹ٫౿ኪࡳಹᅋᅢEMIஜݮᄮᅋوฏۢಹޠჟਈቨনᅺཌ_____________________♦MAX3430:±80V1/4+3.3VRS-485MAX3440E–MAX3444E:±15kVESD±60V10MbpsRS-485/J1708♦MAX3460–MAX3464:+5V20MbpsProfibusRS-485/RS-422MAX3362:+3.3VRS-485/RS-422SOT23MAX3280E–MAX3284E:±15kVESD52Mbps+3V+5.5VSOT23RS-485/RS-422MAX3293/MAX3294/MAX3295:20Mbps+3.3VSOT23RS-485/RS-422♦MAX3030E–MAX3033E:±15kVESD+3.3VRS-422♦MAX3080–MAX3089:(10Mbps)RS-485/RS-422♦MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E:+3.3V±15kVESD12MbpsRS-485/RS-422MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487RS-485/RS-422________________________________________________________________MaximIntegratedProducts1_____________________________________________________________________19-0122;Rev9;9/09۾ᆪဵ፞ᆪၫᓾ೯ࡼፉᆪLjᆪᒦభถࡀᏴडፉࡼݙᓰཀྵࡇᇙăྙኊጙݛཀྵཱྀLj༿Ᏼิࡼଐᒦݬఠ፞ᆪᓾ೯ăᎌਈଥৃĂૡૺࢿ৪ቧᇦLj༿ೊNbyjnᒴሾ၉ᒦቦǖ21911!963!235:!)۱ᒦਪཌ*Lj21911!263!235:!)ฉᒦਪཌ*LjषᆰNbyjnࡼᒦᆪᆀᐶǖdijob/nbyjn.jd/dpnăPARTNUMBERHALF/FULLDUPLEXDATARATE(Mbps)SLEW-RATELIMITEDLOW-POWERSHUTDOWNRECEIVER/DRIVERENABLEQUIESCENTCURRENT(μA)NUMBEROFRECEIVERSONBUSPINCOUNTMAX481Half2.5NoYesYes300328MAX483Half0.25YesYesYes120328MAX485Half2.5NoNoYes300328MAX487Half0.25YesYesYes1201288MAX488Full0.25YesNoNo120328MAX489Full0.25YesNoYes1203214MAX490Full2.5NoNoNo300328MAX491Full2.5NoNoYes3003214MAX1487Half2.5NoNoYes2301288MAXIM0755-28269789–MAX491/MAX1487RS-485/RS-4222_______________________________________________________________________________________ABSOLUTEMAXIMUMRATINGSSupplyVoltage(VCC).............................................................12VControlInputVoltage(RE,DE)...................-0.5Vto(VCC+0.5V)DriverInputVoltage(DI).............................-0.5Vto(VCC+0.5V)DriverOutputVoltage(A,B)...................................-8Vto+12.5VReceiverInputVoltage(A,B).................................-8Vto+12.5VReceiverOutputVoltage(RO)....................-0.5Vto(VCC+0.5V)ContinuousPowerDissipation(TA=+70°C)8-PinPlasticDIP(derate9.09mW/°Cabove+70°C)....727mW14-PinPlasticDIP(derate10.00mW/°Cabove+70°C)..800mW8-PinSO(derate5.88mW/°Cabove+70°C).................471mW14-PinSO(derate8.33mW/°Cabove+70°C)...............667mW8-PinμMAX(derate4.1mW/°Cabove+70°C)..............830mW8-PinCERDIP(derate8.00mW/°Cabove+70°C).........640mW14-PinCERDIP(derate9.09mW/°Cabove+70°C).......727mWOperatingTemperatureRangesMAX4__C__/MAX1487C_A...............................0°Cto+70°CMAX4__E__/MAX1487E_A.............................-40°Cto+85°CMAX4__MJ_/MAX1487MJA...........................-55°Cto+125°CStorageTemperatureRange.............................-65°Cto+160°CLeadTemperature(soldering,10sec).............................+300°CDCELECTRICALCHARACTERISTICS(VCC=5V±5%,TA=TMINtoTMAX,unlessotherwisenoted.)(Notes1,2)Stressesbeyondthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.VVIN=-7VVIN=12VVIN=-7VVIN=12VInputCurrent(A,B)IIN2VTHkΩ48-7V≤VCM≤12V,MAX487/MAX1487RINReceiverInputResistance-7V≤VCM≤12V,alldevicesexceptMAX487/MAX1487R=27Ω(RS-485),Figure40.4V≤VO≤2.4VR=50Ω(RS-422)IO=4mA,VID=-200mVIO=-4mA,VID=200mVVCM=0V-7V≤VCM≤12VDE,DI,REDE,DI,REMAX487/MAX1487,DE=0V,VCC=0Vor5.25VDE,DI,RER=27Ωor50Ω,Figure4R=27Ωor50Ω,Figure4R=27Ωor50Ω,Figure4DE=0V;VCC=0Vor5.25V,alldevicesexceptMAX487/MAX1487CONDITIONSkΩ12μA±1IOZRThree-State(highimpedance)OutputCurrentatReceiverV0.4VOLReceiverOutputLowVoltage3.5VOHReceiverOutputHighVoltagemV70ΔVTHReceiverInputHysteresisV-0.20.2ReceiverDifferentialThresholdVoltage-0.2mA0.25mA-0.81.01.55VOD2DifferentialDriverOutput(withload)V2V5VOD1DifferentialDriverOutput(noload)μA±2IIN1InputCurrentV0.8VILInputLowVoltageV2.0VIHInputHighVoltageV0.2ΔVODChangeinMagnitudeofDriverCommon-ModeOutputVoltageforComplementaryOutputStatesV0.2ΔVODChangeinMagnitudeofDriverDifferentialOutputVoltageforComplementaryOutputStatesV3VOCDriverCommon-ModeOutputVoltageUNITSMINTYPMAXSYMBOLPARAMETERMAXIM0755-28269789–MAX491/MAX1487RS-485/RS-422_______________________________________________________________________________________________________3SWITCHINGCHARACTERISTICS—MAX481/MAX485,MAX490/MAX491,MAX1487(VCC=5V±5%,TA=TMINtoTMAX,unlessotherwisenoted.)(Notes1,2)D