Datasheet

14
I/O
Port
Shift
Register
8 Bits
LP Filter
Interrupt
Logic
Input
Filter
15
Power-On
Reset
Read Pulse
Write Pulse
2
1
13
16
8
GND
V
C
C
SDA
SCL
A1
A0
INT
I
2
C Bus
Control
P7−P0
3
A2
PCA9554
www.ti.com ........................................................................................................................................................SCPS128B–JULY2006–REVISEDAUGUST2008
TERMINALFUNCTIONS
NO.
QSOP(DBQ)
SOIC(DW),
NAMEDESCRIPTION
QFN(RGT)AND
SSOP(DB),
QFN(RGV)
TSSOP(PW),AND
TVSOP(DGV)
115A0Addressinput.ConnectdirectlytoV
CC
orground.
216A1Addressinput.ConnectdirectlytoV
CC
orground.
31A2Addressinput.ConnectdirectlytoV
CC
orground.
42P0P-portinput/output.Push-pulldesignstructure.
53P1P-portinput/output.Push-pulldesignstructure.
64P2P-portinput/output.Push-pulldesignstructure.
75P3P-portinput/output.Push-pulldesignstructure.
86GNDGround
97P4P-portinput/output.Push-pulldesignstructure.
108P5P-portinput/output.Push-pulldesignstructure.
119P6P-portinput/output.Push-pulldesignstructure.
1210P7P-portinput/output.Push-pulldesignstructure.
1311INTInterruptoutput.ConnecttoV
CC
throughapullupresistor.
1412SCLSerialclockbus.ConnecttoV
CC
throughapullupresistor.
1513SDASerialdatabus.ConnecttoV
CC
throughapullupresistor.
1614V
CC
Supplyvoltage
FUNCTIONALBLOCKDIAGRAM
A.PinnumbersshownarefortheDB,DBQ,DGV,DW,N,orPWpackage.
B.AllI/Osaresettoinputsatreset.
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Not Recommended for New Designs