Datasheet

22
I/O
Port
P17−P10
Shift
Register
16 Bits
LP Filter
Interrupt
Logic
Input
Filter
23
Power-On
Reset
Read Pulse
Write Pulse
PCA9555
3
2
21
1
24
12
GND
V
C
C
SDA
SCL
A2
A1
A0
INT
I
2
C Bus
Control
P07−P00
PCA9555
SCPS131E–AUGUST2005–REVISEDMAY2008......................................................................................................................................................... www.ti.com
LOGICDIAGRAM(POSITIVELOGIC)
A.PinnumbersshownareforDB,DBQ,DGV,DW,andPWpackages.
B.AllI/Osaresettoinputsatreset.
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ProductFolderLink(s):PCA9555
Not Recommended for New Designs