PCA9555 datasheet(4/35 Pages) TI

Part #	PCA9555

Description	REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

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Manufacturer	TI [Texas Instruments]

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22

I/O

Port

P17−P10

Shift

Register

16 Bits

LP Filter

Interrupt

Logic

Input

Filter

23

Power-On

Reset

Read Pulse

Write Pulse

PCA9555

3

2

21

1

24

12

GND

VCC

SDA

SCL

A2

A1

A0

INT

I2C Bus

Control

P07−P00

PCA9555

REMOTE 16-BIT I2C AND SMBus I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

SCPS131D – AUGUST 2005 – REVISED OCTOBER 2006

LOGIC DIAGRAM (POSITIVE LOGIC)

A.

Pin numbers shown are for DB, DBQ, DGV, DW, and PW packages.

B.

All I/Os are set to inputs at reset.

4

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