PCA9557PW datasheet(3/36 Pages) TI

Part #	PCA9557PW

Description	REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH RESET AND CONFIGURATION REGISTERS

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Manufacturer	TI [Texas Instruments]

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3 / 36 page

1

I/O

Port

Shift

Register

8 Bits

Input

Filter

2

Power-On

Reset

Read Pulse

Write Pulse

5

4

3

16

8

GND

VCC

SDA

SCL

A2

A1

A0

I2C-Bus

Control

P7−P0

RESET

15

PCA9557

www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008

LOGIC DIAGRAM (POSITIVE LOGIC)

A.

Pin numbers shown are for the D, DB, DGV, PW, and RGY packages.

B.

All I/Os are set to inputs at reset.

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3

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