MAX3485CPA中文资料Word文件下载.docx
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MAX3485CPA中文资料Word文件下载.docx
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______________OrderingInformation
Low-PowerRS-485/RS-422TransceiversTelecommunications
TransceiversforEMI-SensitiveApplicationsIndustrial-ControlLocalAreaNetworks
*Contactfactoryforfordicespecifications.
______________________________________________________________SelectionTable
**********SUPPLYSLEW-*****VER/**********DATA*****TAGE
HALF/FULL(Mbps)
(V)
DUPLEX
*****
***************BLE
(nA)
*****X*****.25HalfYesYes28MAX*****HalfNoYes28MAX*****.5YesYes28MAX*****.253.0to3.6HalfFullYesNo―8MAX*****FullNoNo―8*****
10
Full
No
Yes
2
14
________________________________________________________________MaximIntegratedProducts
1
Calltollfree1-800-998-8800forfreesamplesorliterature.
*****/*****/*****/*****/*****/*****
3.3V-Powered,10MbpsandSlew-Rate-LimitedTrueRS-485/RS-422Transceivers
*****E**********
SupplyVoltage(VCC)...............................................................7VDriverInputVoltage(DI).............................................-0.3Vto7VDriverOutputVoltage(A,B,Y,Z)..........................-7.5Vto12.5VReceiverInputVoltage(A,B)................................-7.5Vto12.5VReceiverOutputVoltage(RO)....................-0.3Vto(VCC+0.3V)ContinuousPowerDissipation(TA=+70°
C)
8-PinPlasticDIP(derate9.09mW/°
Cabove+70°
C).....727mW8-PinSO(derate5.88mW/°
C)..................471mW
14-PinPlasticDIP(derate10mW/°
C)......800mW14-PinSO(derate8.33mW/°
C)................667mWOperatingTemperatureRanges
MAX34__C__.......................................................0°
Cto+70°
CMAX34__E__....................................................-40°
Cto+85°
CStorageTemperatureRange.............................-65°
Cto+160°
CLeadTemperature(soldering,10sec).............................+300°
C
Stressesbeyondthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.
DC*****CAL**********S
(VCC=3.3V±
0.3V,TA=TMINtoTMAX,unlessotherwisenoted.TypicalvaluesareatTA=+25°
2_______________________________________________________________________________________
DC*****CAL**********S(continued)
DRIVER*****NG**********S―*****,*****,and*****
(VCC=3.3V,TA=+25°
DRIVER*****NG**********S―*****
_______________________________________________________________________________________
3
DRIVER*****NG**********S―*****and*****
*****R*****NG**********S
Note1:
VODandVOCarethechangesinVODandVOC,respectively,whentheDIinputchangesstate.Note2:
Measuredon|tPLH(Y)-tPHL(Y)|and|tPLH(Z)-tPHL(Z)|.
Note3:
highandDElow.Iftheinputsareinthisstateforlessthan80ns,the
partsareguaranteednottoentershutdown.Iftheinputsareinthisstateforatleast300ns,thepartsareguaranteedtohaveenteredshutdown.SeeLow-PowerShutdownModesection.4
__________________________________________TypicalOperatingCharacteristics
C,unlessotherwisenoted.)
OUTPUT*****vs.
*****ROUTPUTHIGH*****
*****ROUTPUTLOW*****
vs.*****TURE
251
-202
3.3000--*****-*****XXAAMM)
)
V3.25A20
A-16(mm((-14*****5NT3.20EERR-12*****CC-10HG3.15ITTU10
U-8H*****U3.10OO-6PTU5
-4O-2
3.05003.00
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-40-***-*****0*****
OUTPUTLOW*****(V)
OUTPUTHIGH*****(V)
*****TURE(°
DRIVEROUTPUT*****vs.DRIVER*****NTIALOUTPUTvs.*****TURE
*****NTIALOUTPUT*****
*****vs.*****TURE
0.*****
0-2.*****)
30.7XVA(2.5M)
EVG(0.6)
A80A2.4EmTGLA(70O2.3T0.5TVNLOETU2.2VR60PW0.4RUTU2.1OC50LOTT0.3U40LA2.0*****NE1.9UO0.2*****EF1.80.1FI10D1.700
1.6
-40
-20
20
40
***-*****0.51.01.52.02.53.03.5
60
80
100
C)*****NTIALOUTPUT*****(V)*****TURE(°
OUTPUT*****vs.OUTPUT*****vs.DRIVEROUTPUTLOW*****
DRIVEROUTPUTHIGH*****
1757
-100
8
00--***-**********MM)
-80
AAmm(125(*****100E-60
RRUUCTU75CTU-40
*****0UO-*****
4
6
12
-7-6-5-4-3-2-*****
5
_______________________________________________________________________________________5
_____________________________TypicalOperatingCharacteristics(continued)
SUPPLY*****vs.*****TURE
SUPPLY*****(mA)
1.1
0.9
*****N*****vs.*****TURE
90*****N*****(nA)
***-********-*****
*****-10
1.2100
0.80.7
0-40
______________________________________________________________PinDescription
Figure1.*****/*****/*****PinConfigurationandTypicalOperatingCircuit
Figure2.*****/*****PinConfigurationandTypicalOperatingCircuit
Figure3.*****PinConfigurationandTypicalOperatingCircuit
7
Figure4.DriverVODandVOCFigure5.DriverVODwithVaryingCommon-ModeVoltage
Figure6.ReceiverVOHandVOL
Figure7.DriverDifferentialOutputDelayandTransitionTimes
8_______________________________________________________________________________________
Figure8.DriverPropagationTimes
Figure9.DriverEnableandDisableTimes(tPZH,tPSH,tPHZ)
Figure10.DriverEnableandDisableTimes(tPZL,tPSL,tPLZ)
_______________________________________________________________________________________9
Figure11.ReceiverPropagationDelay
Figure12.ReceiverEnableandDisableTimes
Note4:
Theinputpulseissuppliedbyageneratorwiththefollowingcharacteristics:
PRR=250kHz,50%dutycycle,tr≤6.0ns,ZO=50.Note5:
CLincludesprobeandstraycapacitance.10
______________________________________________________________________________________
____________________FunctionTables
__________ApplicationsInformation
DeviceswithReceiver/DriverEnableThe*****/*****/*****/*****/*****/(*****/*****/*****/*****)
*****arelow-powertransceiversforRS-485andRS-422communications.The*****and*****Table1.Transmitting
cantransmitandreceiveatdataratesupto250kbps,the*****atupto2.5Mbps,andthe*****/*****/*****atupto10Mbps.The*****/*****/*****arefull-duplextransceivers,whilethe*****/*****/*****arehalf-duplex.includedonthe*****/*****/*****/*****.Whendisabled,thedriverandreceiverout-putsarehighimpedance.
*BandAoutputsareZandY,respectively,forfull-duplexpart(*****).
ReducedEMIandRefle
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