PCA9557DBR - Texas Instruments

Manufacturer Part Number

PCA9557DBR

Manufacturer

Texas Instruments

Introduction

The PCA9557DBR is an obsolete 8-bit I/O expander from Texas Instruments, designed for I2C and SMBus interface applications.

Product Features and Performance

8 I/O pins

I2C and SMBus interface compatibility

No interrupt output

Features Power-on Reset (POR)

Output types include Open Drain and Push-Pull

Current Output Source/Sink: 10mA, 25mA

Clock Frequency: 400 kHz

Voltage Supply: 2.3V ~ 5.5V

Operating Temperature Range: -40°C ~ 85°C

Surface Mount package

Product Advantages

Provides additional I/O ports using I2C, optimizing board space

Flexible voltage supply range

Compatible with serial communication protocols

Suitable for various temperature environments

Key Technical Parameters

Number of I/O: 8

Interface: I2C, SMBus

Current Output Source/Sink: 10mA, 25mA

Clock Frequency: 400 kHz

Voltage Supply: 2.3V ~ 5.5V

Operating Temperature: -40°C ~ 85°C

Quality and Safety Features

Robust operating temperature range

Built-in Power-on Reset for reliable startup

Compatibility

I2C and SMBus interfaces

Wide voltage range for versatile power supply options

Application Areas

Expanding I/O capabilities in microcontroller projects

Industrial and consumer electronics

Automation systems

Embedded systems requiring additional I/Os

Product Lifecycle

Obsolete status indicates no longer in production

Users should verify availability of replacements or upgrades

Several Key Reasons to Choose This Product

Offers an effective solution for expanding I/O capabilities

Flexible power supply and interface compatibility

Built for reliability in diverse operational conditions

Texas Instruments' reputation for quality electronic components