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PCF8574ADWE4 Datasheet(PDF) 9 Page - Texas Instruments

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Part # PCF8574ADWE4
Description  Remote 8-Bit I/O Expander
Download  35 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

PCF8574ADWE4 Datasheet(HTML) 9 Page - Texas Instruments

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background image
W
A
0.7 × VCC
0.3 × VCC
SCL
D
tpv
Slave
Acknowledge
Unstable
Data
Last Stable Bit
SDA
Pn
A
A
A
A
S
0
1
0
0
A1
A2
A0 1
Data 1
1
P
Data 3
Start
Condition
Acknowledge
From Slave
Acknowledge
From Slave
Data From Port
Data From Port
Slave Address
R/W
8
7
6
5
4
3
2
1
tir
tir
tsps
tiv
Data 1
Data 2
Data 3
INT
Data
Into
Port
B
B
A
A
P
INT
n
R/W
A
tir
0.7 × VCC
0.3 × VCC
0.7 × VCC
0.3 × VCC
0.7 × VCC
0.3 × VCC
0.7 × VCC
0.3 × VCC
INT
SCL
View B−B
View A−A
tiv
PCF8574A
www.ti.com
SCPS069F – JULY 2001 – REVISED NOVEMBER 2015
Parameter Measurement Information (continued)
Figure 13. Interrupt Voltage Waveforms
Figure 14. I2C Write Voltage Waveforms
Copyright © 2001–2015, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Links: PCF8574A


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