PCF8575
REMOTE 16-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT
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SCPS121C–JANUARY 2005–REVISED OCTOBER 2006
PARAMETER MEASUREMENT INFORMATION (continued)
V
CC
V
CC
R
L
= 1 kΩ
R
L
= 4.7 kΩ
SDA
INT
Pn
DUT
DUT
DUT
C
L
= 50 pF
C
L
= 100 pF
C = 100 pF
L
GND
GND
INTERRUPT LOAD CONFIGURATION
GND
P-PORT LOAD CONFIGURATION
SDA LOAD CONFIGURATION
0.7 × V
0.3 × V
CC
SCL
SDA
P00
A
P17
CC
Slave
ACK
t
pv
P
n
Last Stable Bit
Unstable
Data
Write-Mode Timing (R/W = 0)
0.7 × V
0.3 × V
CC
SCL
P00
A
P17
CC
t
su
t
h
0.7 × V
0.3 × V
CC
P
n
CC
Read-Mode Timing (R/W = 1)
Figure 8. P-Port Load Circuits and Voltage Waveforms
15
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