PCA8574ATS datasheet(5/27 Pages) NXP

Part #	PCA8574ATS

Description	Remote 8-bit I/O expander for I2C-bus with interrupt

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Manufacturer	NXP [NXP Semiconductors]

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PCA8574_PCA8574A_2

Product data sheet

Rev. 02 — 14 May 2007

5 of 27

NXP Semiconductors

PCA8574/74A

Remote 8-bit I/O expander for I2C-bus with interrupt

Table 3.

Pin description for SSOP20

Symbol

Description

INT

1

interrupt output (active LOW)

SCL

2

serial clock line

n.c.

3

not connected

SDA

4

serial data line

VDD

5

supply voltage

AD0

6

address input 0

AD1

7

address input 1

n.c.

8

not connected

AD2

9

address input 2

P0

10

quasi-bidirectional I/O 0

P1

11

quasi-bidirectional I/O 1

P2

12

quasi-bidirectional I/O 2

n.c.

13

not connected

P3

14

quasi-bidirectional I/O 3

VSS

15

supply ground

P4

16

quasi-bidirectional I/O 4

P5

17

quasi-bidirectional I/O 5

n.c.

18

not connected

P6

19

quasi-bidirectional I/O 6

P7

20

quasi-bidirectional I/O 7

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