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PCF8574ADW Datasheet(PDF) 3 Page - Texas Instruments

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Part # PCF8574ADW
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

PCF8574ADW Datasheet(HTML) 3 Page - Texas Instruments

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background image
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A0
A1
A2
P0
P1
P2
P3
GND
VCC
SDA
SCL
INT
P7
P6
P5
P4
DW OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
INT
SCL
NC
SDA
VCC
A0
A1
NC
A2
P0
P7
P6
NC
P5
P4
GND
P3
NC
P2
P1
DGV OR PW PACKAGE
(TOP VIEW)
RGY PACKAGE
(TOP VIEW)
1
20
10
11
2
3
4
5
6
7
8
9
19
18
17
16
15
14
13
12
P6
NC
P5
P4
GND
P3
NC
P2
SCL
NC
SDA
VCC
A0
A1
NC
A2
PCF8574A
www.ti.com
SCPS069F – JULY 2001 – REVISED NOVEMBER 2015
5 Pin Configuration and Functions
Pin Functions
PIN
TYPE
DESCRIPTION
NAME
RGY
DGV or PW
DW or N
Address inputs 0 through 2. Connect directly to VCC or ground. Pullup
A[0..2]
6, 7, 9
6, 7, 9
1, 2, 3
I
resistors are not needed.
GND
15
15
8
—
Ground
INT
1
1
13
O
Interrupt output. Connect to VCC through a pullup resistor.
NC
3, 8, 13, 18
3, 8, 13, 18
-
—
Do not connect
4, 5, 6, 7,
10, 11, 12, 14,
10, 11, 12, 14,
P[0..7]
9, 10, 11,
I/O
P-port input/output. Push-pull design structure.
16, 17, 19, 20
16, 17, 19, 20
12
SCL
2
2
14
I
Serial clock line. Connect to VCC through a pullup resistor
SDA
4
4
15
I/O
Serial data line. Connect to VCC through a pullup resistor.
VCC
5
5
16
—
Voltage supply
Copyright © 2001–2015, Texas Instruments Incorporated
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