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PCF8574 Datasheet(PDF) 10 Page - Texas Instruments

Part # PCF8574
Description  PCF8574 Remote 8-Bit I/O Expander for I2C Bus
PDF  42 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

PCF8574 Datasheet(HTML) 10 Page - Texas Instruments

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background image
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
Figure 6-2. Interrupt Voltage Waveforms
W
A
0.7 × VCC
0.3 × VCC
SCL
D
tpv
Slave
Acknowledge
Unstable
Data
Last Stable Bit
SDA
Pn
Figure 6-3. I2C Write Voltage Waveforms
PCF8574
SCPS068K – JULY 2001 – REVISED SEPTEMBER 2024
www.ti.com
10
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Copyright © 2024 Texas Instruments Incorporated
Product Folder Links: PCF8574



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