元器件交易网

TMDS442

SLLS757A–AUGUST2006–REVISEDMARCH2007

4-TO-2DVI/HDMISWITCH

FEATURES

A4-to-2Single-Linkor2-to-1Dual-LinkDVI/HDMIPhysicalLayerSwitchCompatiblewithHDMI1.3a

Supports2.25GbpsSignalingRatefor480i/p,720i/p,and1080i/pResolutionsupto12-BitColorDepth

IntegratedReceiverTerminations

8-dBReceiverEqualizerCompensatesforLossesFromStandardHDMICables

SelectableOutputDe-EmphasisCompensatesforLossesFromFlatCables

High-ImpedanceOutputsWhenDisabled

I2CRepeaterIsolatesBusCapacitanceatBothEnds

TMDSInputsHBMESDProtectionExceeds6kV

3.3-VSupplyOperation128-PinTQFPPackage

ROHSCompatibleand260°CReflowRated

APPLICATIONS

DigitalTV

DigitalProjector

AudioVideoReceiverDVIorHDMISwitch

DESCRIPTION

TheTMDS442,4-to-2portDVI/HDMIswitch,allowsupto4digitalvideointerface(DVI)orhigh-definitionmultimediainterface(HDMI)portstobeswitchedtotwoindependentdisplayblocks.Theessentialrequirementofpicture-in-picturedisplayfromtwodigitalaudiovisualsourcesishavingtwoindividualDVIorHDMIreceiversinadigitaldisplaysystem.TMDS442supportstwoDVIorHDMIreceiverstoenablemultiple-sourceselection(picture-in-picture),aswellassupportsactingasa4-input1-outputvideoswitch.

Eachinputoroutputportcontainsone5-Vpowerindicator(5V_PWR),onehotplugdetector(HPD),apairofI2Cinterfacesignals(SCL/SDA),andfourTMDSchannelssupportingdataratesupto2.25Gbps.The5-Vpowerindicatorandthehotplugdetectorarepulleddownwithinternalresistors,forcingalowstateonthesepinsuntilreceivingavalidhighsignal.TheI2CinterfaceisconstructedbyanI2Crepeatercircuittoisolatethecapacitanceformbothendsofthebuses.TMDSreceiversintegrate50- terminationresistorspulleduptoVCC,whicheliminatestheneedforexternalterminations.An8-dBinputequalizationcooperatestoeachTMDSreceiverinputstooptimizesystemperformancethrough5-meterorlongerDVIorHDMIcompliantcables.

TYPICALAPPLICATION

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PowerPADisatrademarkofTexasInstruments.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.

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