PCA9557PW - Texas Instruments

Manufacturer Part Number

PCA9557PW

Manufacturer

Texas Instruments

Introduction

A flexible I/O expander for multiple applications with I2C/SMBus interface protocols.

Product Features and Performance

Eight I/Os with configurable push-pull or open-drain

Supports 400 kHz I2C-bus frequency

Power-On Reset feature

Individual I/O configuration

Product Advantages

Saves microcontroller I/O ports

Supports a wide voltage supply range from 2.3V to 5.5V

Tolerates operating temperatures from -40°C to 85°C

Key Technical Parameters

Number of I/O: 8

Interface: I2C, SMBus

Output Type: Open Drain, 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

Quality and Safety Features

Compliance with industry standards

Robust operation within the specified temperature range

Compatibility

Interfaces with standard I2C and SMBus systems

Application Areas

Integration into embedded systems, industrial control, consumer electronics, etc.

Product Lifecycle

Obsolete

Limited availability with no direct replacements

Potential for upgrades in newer Interface I/O Expander models

Key Reasons to Choose This Product

Ease of expanding I/O ports for processors

Versatile interface compatibility with I2C and SMBus

Suitable for a broad range of voltages and harsh environments

Addresses the need for additional I/Os without complex circuitry