Datasheet

A
A
A
A
S 0 1 1 1 A1A2 A0 1 Data 1 1 PData 2
Start
Condition
8 Bits
(One Data Bytes)
From Port
Data From PortSlave Address
R/W
87654321
t
ir
t
ir
t
sp
s
t
iv
Address Data 1 Data 2
INT
Data
Into
Port
B
B
A
A
P
n
INT
R/W A
t
ir
0.7 × V
C
C
0.3 × V
CC
0.7 × V
CC
0.3 × V
CC
0.7 × V
CC
0.3
× V
CC
0.7 × V
CC
0.3 × V
CC
INT
SCL
View B−BView A−A
t
iv
R
L
= 4.7 kΩ
V
CC
C
L
= 100 pF
(see Note A)
INTERRUPT LOAD CONFIGURATION
DUT
INT
ACK
From Slave
ACK
From Slave
1.5 V
PCA9554A
www.ti.com ...........................................................................................................................................SCPS127D–SEPTEMBER2006–REVISEDAUGUST2008
PARAMETERMEASUREMENTINFORMATION(continued)
A.C
L
includesprobeandjigcapacitance.
B.Allinputsaresuppliedbygeneratorshavingthefollowingcharacteristics:PRR≤10MHz,Z
O
=50Ω,t
r
/t
f
≤30ns.
C.Allparametersandwaveformsarenotapplicabletoalldevices.
Figure11.InterruptLoadCircuitandVoltageWaveforms
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ProductFolderLink(s):PCA9554A
Not Recommended for New Designs