Datasheet

DESCRIPTION/ORDERINGINFORMATION(CONTINUED)
PCA9554A
SCPS127D–SEPTEMBER2006–REVISEDAUGUST2008........................................................................................................................................... www.ti.com
INTcanbeconnectedtotheinterruptinputofamicrocontroller.Bysendinganinterruptsignalonthisline,the
remoteI/Ocaninformthemicrocontrollerifthereisincomingdataonitsportswithouthavingtocommunicatevia
theI
2
Cbus.Thus,thePCA9554Acanremainasimpleslavedevice.
Thedevice'soutputs(latched)havehigh-currentdrivecapabilityfordirectlydrivingLEDsandlowcurrent
consumption.
Threehardwarepins(A0,A1,andA2)areusedtoprogramandvarythefixedI
2
Caddressandallowuptoeight
devicestosharethesameI
2
CbusorSMBus.
ThePCA9554Aispin-to-pinandI
2
CaddresscompatiblewiththePCF8574A.However,softwarechangesare
required,duetotheenhancementsinthePCA9554AoverthePCF8574A.
ThePCA9554AandPCA9554areidenticalexceptfortheirfixedI
2
Caddress.Thisallowsforupto16ofthese
devices(8ofeach)onthesameI
2
C/SMBus.
ORDERINGINFORMATION
T
A
PACKAGE
(1)(2)
ORDERABLEPARTNUMBERTOP-SIDEMARKING
QFN–RGTReelof3000PCA9554ARGTRZVH
QFN–RGVReelof2500PCA9554ARGVRPD554A
Tubeof75PCA9554ADBQ
QSOP–DBQPD554A
Reelof2500PCA9554ADBQR
Tubeof40PCA9554ADW
SOIC–DWPCA9554A
Reelof2000PCA9554ADWR
–40°Cto85°CPCA9554ADB
Tubeof80
SSOP–DBPCA9554ADBG4PD554A
Reelof2000PCA9554ADBR
Tubeof90PCA9554APW
TSSOP–PWPD554A
Reelof2000PCA9554APWR
Reelof2000PCA9554ADGVR
TVSOP–DGVPD554A
Reelof125PCA9554ADGV
(1)Packagedrawings,thermaldata,andsymbolizationareavailableatwww.ti.com/packaging.
(2)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
2SubmitDocumentationFeedbackCopyright©2006–2008,TexasInstrumentsIncorporated
ProductFolderLink(s):PCA9554A
Not Recommended for New Designs