PCA9555DW - Texas Instruments

Manufacturer Part Number

PCA9555DW

Manufacturer

Texas Instruments

Introduction

The PCA9555DW is an I/O expander for the I2C bus and SMBus, providing 16 additional I/O pins.

Product Features and Performance

16 I/O ports

I2C and SMBus interface

Interrupt output with POR feature

Push-Pull output type

Source/Sink current capability of 10mA and 25mA

Product Advantages

Extended I/O capability for processors with limited I/O pins

Flexible interface accommodating both I2C and SMBus

Built-in Power-on reset improves reliability on power-up

Support for both push-pull and open-drain configurations

Key Technical Parameters

Number of I/O: 16

Interface: I2C, SMBus

Interrupt Output: Yes

Features: Power-on Reset (POR)

Output Type: Push-Pull

Current - Output Source/Sink: 10mA, 25mA

Clock Frequency: 400 kHz

Voltage - Supply: 2.3V to 5.5V

Operating Temperature: -40°C to 85°C

Mounting Type: Surface Mount

Package / Case: 24-SOIC

Quality and Safety Features

Operational across a wide temperature range

Supports hot insertion

Compatibility

Compatible with various microcontrollers and processors with I2C or SMBus interface

Application Areas

Embedded systems

Industrial control

Home automation

Server motherboards

Product Lifecycle

Obsolete status indicates it's nearing discontinuation

Alternatives or upgrades should be considered

Several Key Reasons to Choose This Product

Expands I/O port availability in space-constrained applications

Supports industry-standard I2C and SMBus for easy integration

Provides design flexibility with various output types

Facilitates reliable system operation with built-in POR

Wide operating voltage and temperature range suitable for harsh environments

Compatibility with multiple devices and applications

Accommodates future needs with alternatives due to obsolescence

Offers ease of mounting with surface mount packaging technology