PCF8574TDK NXP Semiconductors, PCF8574TDK Datasheet - Page 10

• Manufacturer Part Number: PCF8574TDK
• Description: I/O Expander 20-Pin SSOP Tube
• Manufacturer: NXP Semiconductors

Specifications of PCF8574TDK

• Package: 20SSOP
• Operating Temperature: -40 to 85 °C

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FROM PORT
DATA OUT
WRITE TO
PORT
SCL
SDA
start condition
S
1
0
slave address (PCF8574)
2
1
0
3
4
0
A2
5
A1
6
A0
7
R/W
8
0
A
acknowledge
from slave
Fig.11 WRITE mode (output).
data to port
DATA 1
t pv
A
acknowledge
from slave
data to port
DATA 1 VALID
DATA 2
t pv
A
acknowledge
from slave
DATA 2 VALID
MBD974