TUSB522PIRGET 5Gb/s 98mA USB Interface ICs Redriver

    TUSB522PIRGET USB Interface IC Type Redriver, Repeater, Equalizer

1.Features

USB3.1GEN15 Gbps,Dual-ChannelRe-Driverwith 3.3-VPowerSupply
• Ultra-Low-PowerArchitecture– Active:98 mA– U2, U3: 1.2 mA– Disconnect265 μA– Shutdown60 μA
• OptimalReceiverEqualization– of 3, 6, 9 dB at 2.5 GHz
• OutputDriverDe-emphasisof 0, 3.5, and 6 dB• AutomaticLFPSDe-EmphasisControlto MeetUSB3.1 CertificationRequirements
• No Host/Device-SideRequirement• Hot-PlugCapable
• IndustrialTemperatureRange:–40ºC to 85ºCTUSB522PI
• CommercialTemperatureRange:0ºC to 70ºCTUSB522P

2.Applications

Cell Phones
• Tablets
• Notebooks
• Desktops
• Docking Stations
• Backplanes and Active Cables

3.Description

The TUSB522Pis a fourthgeneration,dual-channel,single-laneUSB3.1GEN1redriverandsignalconditionersupporting5 Gbps.The deviceofferslowpowerconsumptionon a 3.3 V supplywith its ultra-low-powerarchitecture.Theredriveralsosupportsthe USB3.1 low powermodes,whichfurtherreducesidle powerconsumption.Thedual-channelcapabilityenablesthe systemtomaintainsignalintegrityon bothtransmitand receivedatapaths.The receiverequalizationhas threegainsettingsto overcomechanneldegradationfrominsertionlossandinter-symbolinterference.ThesesettingsarecontrolledfromtheEQpins.Tocompensatefor transmissionline losses,the outputdriversupportsconfigurationof De-EmphasiswithpinsDE. Additionally,automaticLFPSDe-Emphasiscontrolallowsfor full USB3.1 compliance.Thesesettingsallowoptimalperformance,increasedsignalingdistance,and flexibilityin placementof theTUSB522Pin the USB3.1 GEN1path

4.Simplified Schematic

5.Pin Configurationand Functions

6.Overview

The TUSB522Pis designedto overcomechannelloss due to inter-symbolinterferenceand crosstalkwhen5GbpsUSB3.1GEN1signalstravelacrossa PCBor cable.The dualchannelarchitectureis a one-chip,low-powersolution,extendingthe possiblechannellengthfor transmitand receivedatapathsin an application.For aHostapplication,this enablesthe systemto passbothtransmittercomplianceand receiverjitter tolerancetests.The re-driverrecoversincomingdataby applyingequalizationthat compensatesfor channelloss,and drivesoutsignalswith a highdifferentialvoltage.Eachchannelhas a receiverequalizerwith selectablegainsettings.Theequalizationshouldbe set basedon the amountof insertionlossin channel1 or 2 beforethe TUSB522Preceivers.Likewise,the outputdriverssupportconfigurationof De-Emphasis.Independentequalizationand de-emphasiscontrolfor eachchannelcan be set usingEQ1/2and DE1/2pins.TheTUSB522Padvancedstatemachinemakesit transparentto hostsanddevices.Afterpowerup, theTUSB522Pperiodicallyperformsreceiverdetectionon the TX pairs.If it detectsa USB3.1GEN1receiver,theRX terminationis enabled,and the TUSB522Pis readyto re-drive.The deviceultra-low-powerarchitectureoperatesat a 3.3-Vpowersupplyand achievesEnhancedperformance.The automaticLFPSDe-Emphasiscontrolfurtherenablesthe systemto be USB3.1compliant

8.FunctionalBlockDiagram

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