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PCF8574ADGVR Fiches technique(PDF) 13 Page - Texas Instruments

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No de pièce PCF8574ADGVR
Description  Remote 8-Bit I/O Expander
PDF  35 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

PCF8574ADGVR Fiches technique(HTML) 13 Page - Texas Instruments

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background image
A
A
S
0
1
1
1
A1
A2
A0
0
Start
Condition
ACK
From Slave
ACK
From Slave
Data
Data
Slave Address
R/W
P7
P6
1
P0
P7
P0
A
Integral Multiples of Two Bytes
P5
tpv
IOHT
tir
SCL
SDA
Write to
Port
Data Output
Voltage
P5 Output
Voltage
P5 Pullup
Output
Current
INT
ACK
From Slave
Data A0
and B0
Valid
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
IOH
PCF8574A
www.ti.com
SCPS069F – JULY 2001 – REVISED NOVEMBER 2015
8.3.3 Address Reference
INPUTS
I2C BUS SLAVE 8-
I2C BUS SLAVE 8-BIT
BIT WRITE
READ ADDRESS
A2
A1
A0
ADDRESS
L
L
L
113 (dec), 71 (hex)
112 (dec), 70 (hex)
L
L
H
115 (dec), 73 (hex)
114 (dec), 72 (hex)
L
H
L
117 (dec), 75 (hex)
116 (dec), 74 (hex)
L
H
H
119 (dec), 77 (hex)
118 (dec), 76 (hex)
H
L
L
121 (dec), 79 (hex)
120 (dec), 78 (hex)
H
L
H
123 (dec), 7B (hex)
122 (dec), 7A (hex)
H
H
L
125 (dec), 7D (hex)
124 (dec), 7C (hex)
H
H
H
127 (dec), 7F (hex)
126 (dec), 7E (hex)
8.4 Device Functional Modes
Figure 16 and Figure 17 show the address and timing diagrams for the write and read modes, respectively.
Figure 16. Write Mode (Output)
Copyright © 2001–2015, Texas Instruments Incorporated
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Product Folder Links: PCF8574A



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