PCA9555 datasheet(11/22 Pages) PHILIPS

Part #	PCA9555

Description	16-bit I2C and SMBus I/O port with interrupt

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product data sheet

PCA9555

16-bit I2C and SMBus I/O port with interrupt

2004 Sep 30

11

TYPICAL APPLICATION

SW02284

I/O0.0

I/O0.1

I/O0.2

I/O0.3

I/O0.4

I/O0.5

VDD

SCL

SDA

INT

RESET

MASTER

CONTROLLER

GND

SCL

SDA

PCA9555

A1

A0

VSS

VDD

SUBSYSTEM 3

(e.g. alarm system)

SUBSYSTEM 2

(e.g. counter)

SUBSYSTEM 1

(e.g. temp

sensor)

INT

VDD

ALARM

Controlled Switch

(e.g. CBT device)

ENABLE

10 k

Ω

10 k

Ω

10 k

Ω

2 k

Ω

NOTE: Device address configured as 1110100 for this example

I/O0.0, I/O0.2, I/O0.3, configured as outputs

I/O0.1, I/O0.4, I/O0.5, configured as inputs

I/O0.6, I/O0.7, and I/O1.0 to I/O1.7 configured as inputs

A

B

INT

I/O0.6

I/O0.7

I/O1.0

I/O1.1

I/O1.2

I/O1.3

I/O1.4

I/O1.5

I/O1.6

I/O1.7

10 DIGIT

NUMERIC

KEYPAD

Figure 11. Typical application.

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