ExarCorporation48720KatoRoad,FremontCA,9453850-668-707www.exar.comSP509_00_06080
FEATURES
UltraFast40MbpsDifferentialTransmissionRates
ImprovedESDToleranceforAnalogI/Oswith5kVHBM
InternalTransceiverTerminationResistorsforV./V.35
InterfaceModes:
–RS-232(V.28)
–EIA-530(V.0&V.)
–X.2(V.)
–EIA-530A(V.0&V.)
–RS-449/V.36
–V.35
(V.0&V.)
ProtocolsareSoftwareSelectablewith3-BitWord
Eight(8)DriversandEight(8)Receivers
V.35andV.ReceiverTerminationNetworkDisableOption
InternalLineorDigitalLoopbackforDiagnosticTesting
AdherestoNET/NET2andTBR-/TBR-2Requirements
EasyFlow-ThroughPinout
+5VOnlyOperation
IndividualDriverandReceiverEnable/DisableControls
OperatesineitherDTEorDCEMode
SP509
Rugged40Mbps,8ChannelMulti-ProtocolTransceiver
withProgrammableDCE/DTEandTerminationResistors
DESCRIPTION
TheSP509isamonolithicdevicethatsupportseight(8)popularserialinterfacestandardsfor
WideAreaNetwork(WAN)connectivity.TheSP509isfabricatedusingalowpowerBiCMOS
processtechnology,andincorporatesanExarregulatedchargepumpallowing+5Vonly
operation.Exar'spatentedchargepumpprovidesaregulatedoutputof+5.8V,whichwill
provideenoughvoltageforcompliantoperationinallmodes.Eight(8)driversandeight(8)
receivers can be configured via software for any of the above interface modes at any time.
TheSP509requiresnoadditionalexternalcomponentsforcompliantoperationforallofthe
eight(8)modesofoperationotherthanfourcapacitorsusedfortheinternalchargepump.
AllnecessaryterminationisintegratedwithintheSP509andisswitchablewhenV.35drivers
andV.35receivers,orwhenV.receiversareused.TheSP509providesthecontrolsand
transceiveravailabilityforoperatingaseitheraDTEorDCE.
AdditionalfeatureswiththeSP509includeinternalloopbackthatcanbeinitiatedinanyofthe
operatingmodesbyuseoftheLOOPBACKpin.Whileinloopbackmode,receiveroutputs
areinternallyconnectedtodriverinputscreatinganinternalsignalpathbypassingtheserial
communicationscontrollerfordiagnostictesting.TheSP509alsoincludesalatchenablepin
withthedriverandreceiveraddressdecoder.TheinternalV.orV.35receivertermination
canbeswitchedoffusingacontrolpin(TERM_OFF)formonitoringapplications.Alleight
(8)driversandreceiversintheSP509includeseparateenablepinsforaddedconvenience.
TheSP509isidealforWANserialportsinnetworkingequipmentsuchasrouters,access
concentrators,networkmuxes,DSU/CSU's,networkingtestequipment,andotheraccess
devices.
ApplicableU.S.Patents-5,306,954;andotherspatentspending
APPLICATIONS
Router
FrameRelay
CSU
DSU
PBX
SecureCommunicationTerminals
Now Available in Lead Free Packaging
Refertopage7forpinout