Texas Instruments LMK00308 Handleiding

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100100010000

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

OUTPUT SWING (V)

FREQUENCY (MHz)

Vcco=2.5 V, Rterm=91 

Vcco=3.3 V, Rterm=160 

3:1

MUX

SYNC

CLKoutA0

CLKoutA0*

CLKoutA3

CLKoutA3*

CLKin0

CLKin0*

CLKin1

CLKin1*

OSCin

OSCout

REFout_EN

CLKoutA_TYPE[1:0]

CLKin_SEL[1:0]

REFout (LVCMOS)

GND

V

CCOA

V

CCOC

V

CC

V

CCOA

V

CCOB

V

CCOC

Bank A

4 Output Pairs

(LVPECL, LVDS,

HCSL, or Hi-Z)

2

2

Universal Inputs

(Differential/

Single-Ended)

Crystal

CLKoutB0

CLKoutB0*

CLKoutB3

CLKoutB3*

V

CCOB

CLKoutB_TYPE[1:0]

2

Bank B

4 Output Pairs

(LVPECL, LVDS,

HCSL, or Hi-Z)

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LMK00308

SNAS576D–FEBRUARY2012–REVISEDMARCH2016

LMK003083-GHz8-OutputUltra-LowAdditiveJitter

DifferentialClockBuffer/LevelTranslator

1

1Features

1

•3:1InputMultiplexer:

–TwoUniversalInputsOperateupto3.1GHz

andAcceptLVPECL,LVDS,CML,SSTL,

HSTL,HCSL,orSingle-EndedClocks

–OneCrystalInputAcceptsa10to40MHz

CrystalorSingle-EndedClock

•TwoBankswith4DifferentialOutputsEach:

–LVPECL,LVDS,HCSL,orHi-Z(Selectable

PerBank)

–LVPECLAdditiveJitterwithLMK03806Clock

Sourceat156.25MHz:

–20fsRMS(10kHzto1MHz)

–51fsRMS(12kHzto20MHz)

•HighPSRR:-65/-76dBc(LVPECL/LVDS)at

156.25MHz

•LVCMOSOutputwithSynchronousEnableInput

•Pin-ControlledConfiguration

•V

CC

CoreSupply:3.3V±5%

•3IndependentV

CCO

OutputSupplies:3.3V/2.5V

±5%

•IndustrialTemperatureRange:-40°Cto+85°C

•40-leadWQFN(6mm×6mm)

2Applications

•ClockDistributionandLevelTranslationforADCs,

DACs,Multi-GigabitEthernet,XAUI,Fibre

Channel,SATA/SAS,SONET/SDH,CPRI,High-

FrequencyBackplanes

•Switches,Routers,LineCards,TimingCards

•Servers,Computing,PCIExpress(PCIe3.0)

•RemoteRadioUnitsandBasebandUnits

3Description

TheLMK00308isa3-GHz,8-outputdifferential

fanoutbufferintendedforhigh-frequency,low-jitter

clock/datadistributionandleveltranslation.Theinput

clockcanbeselectedfromtwouniversalinputsor

onecrystalinput.Theselectedinputclockis

distributedtotwobanksof4differentialoutputsand

oneLVCMOSoutput.Bothdifferentialoutputbanks

canbeindependentlyconfiguredasLVPECL,LVDS,

orHCSLdrivers,ordisabled.TheLVCMOSoutput

hasasynchronousenableinputforrunt-pulse-free

operationwhenenabledordisabled.TheLMK00308

operatesfroma3.3Vcoresupplyand3independent

3.3V/2.5Voutputsupplies.

TheLMK00308provideshighperformance,

versatility,andpowerefficiency,makingitidealfor

replacingfixed-outputbufferdeviceswhileincreasing

timingmargininthesystem.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LMK00308WQFN(40)6.00mm×6.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

4FunctionalBlockDiagram

LVPECLOutputSwing(V

OD

)vs.Frequency

Product specificaties