Datasheet

www.ti.com
A
A
A
A
S 0 1 0 0
A
1
A
2
A
0
1 Data 1 1 PData 3
Start
Condition
16 Bits
(2 Data Bytes)
From Port
Data From PortSlave Address (PCF8575)
R/W
87654321
t
ir
t
ir
t
sps
t
iv
Address Data 1 Data 3
INT
Data
Into
Port
B
B
A
A
P
n
INT
R/W A
t
ir
0.7 × V
CC
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
INTERRUPT LOAD CONFIGURATION
DUT
INT
ACK
From Slave
ACK
From Slave
Data 2
Data 2
PCF8575C
REMOTE 16-BIT I
2
C AND SMBus LOW-POWER I/O EXPANDER
WITH INTERRUPT OUTPUT
SCPS123E – MARCH 2005 – REVISED OCTOBER 2007
PARAMETER MEASUREMENT INFORMATION (continued)
Figure 7. Interrupt Load Circuit and Voltage Waveforms
Copyright © 2005 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): PCF8575C