PCF8575C datasheet(6/26 Pages) TI

Part #	PCF8575C

Description	REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT

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Manufacturer	TI [Texas Instruments]

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SDA

SCL

Data Line

Stable;

Data Valid

Change

of Data

Allowed

Data Output

by Transmitter

SCL from

Master

Start

Condition

S

1

2

8

9

Data Output

by Receiver

Clock Pulse for

Acknowledgment

NACK

ACK

PCF8575C

REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT

SCPS123C – MARCH 2005 – REVISED JULY 2006

Figure 2. Bit Transfer

Figure 3. Acknowledgment on I2C Bus

Interface Definition

BIT

BYTE

7 (MSB)

6

5

4

3

2

1

0 (LSB)

I2C slave address

L

H

L

A2

A1

A0

R/W

P0x I/O data bus

P07

P06

P05

P04

P03

P02

P01

P00

P1x I/O data bus

P17

P16

P15

P14

P13

P12

P11

P10

6

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