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PCA9554

8-bit I2C and SMBus I/O Port with Interrupt

ON Semiconductor 

PCA9554

8-bit I2C and SMBus I/O Port

with Interrupt

Description

The PCA9554 is a CMOS device that provides 8−bit parallel

input/output port expansion for I2C and SMBus compatible

applications. This I/O expander provides a simple solution in

applications where additional I/Os are needed: sensors, power

switches, LEDs, pushbuttons, and fans.

The PCA9554 consist of an input port register, an output port

register, a configuration register, a polarity inversion register and an

I2C/SMBus−compatible serial interface.

Any of the eight I/Os can be configured as an input or output by

writing to the configuration register. The system master can invert the

PCA9554 input data by writing to the active−high polarity inversion

register.

The PCA9554 features an active low interrupt output which

indicates to the system master that an input state has changed.

The device’s extended addressing capability allows up to 8 devices

to share the same bus.

Features

• 400 kHz I2C Bus Compatible (Note 1)

• 2.3 V to 5.5 V Operation

• Low Standby Current

• 5 V Tolerant I/Os

• 8 I/O Pins that Default to Inputs at Power−up

• High Drive Capability

• Individual I/O Configuration

• Polarity Inversion Register

• Active Low Interrupt Output

• Internal Power−on Reset

• No Glitch on Power−up

• Noise Filter on SDA/SCL Inputs

• Cascadable up to 8 Devices

• Industrial Temperature Range

• 16−lead TSSOP Package

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Applications

• White Goods (dishwashers, washing machines)

• Handheld Devices (cell phones, PDAs, digital cameras)

• Data Communications (routers, hubs and servers)

1. All I/Os are set to inputs at RESET.

www.onsemi.com

TSSOP−16

Y SUFFIX

CASE 948AN

PIN CONNECTIONS

1

A0

A1

VCC

SDA

A2

SCL

I/O0

INT

I/O1

I/O7

I/O2

I/O6

I/O3

I/O5

VSS

I/O4

TSSOP (Y)

(Top View)

ORDERING INFORMATION

Device

Package

Shipping†

PCA9554DTR2G TSSOP16

(Pb−Free)

2500 / Tape &

Reel

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

© Semiconductor Components Industries, LLC, 2017

1

November, 2017 − Rev. 0

Publication Order Number:

PCA9554/D

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