PCA9557DB - Texas Instruments

Manufacturer Part Number

PCA9557DB

Manufacturer

Texas Instruments

Introduction

The PCA9557DB is an 8-bit I/O expander for the two-line bidirectional bus (I2C or SMBus).

Product Features and Performance

8-bit Input/Output port expander

I2C and SMBus interface support

Power-on reset (POR)

Open-drain and push-pull output types

Operational up to 400 kHz clock frequency

Product Advantages

Flexible I/O expansion for microcontrollers

Wide voltage range support (2.3V to 5.5V)

Available in surface mount package for compact PCB design

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 ~ 5.5V

Operating Temperature: -40°C ~ 85°C

Quality and Safety Features

Conforms to Texas Instruments' standards for quality and reliability

Compatibility

Compatible with microcontrollers supporting I2C and SMBus protocols

Application Areas

Industrial controls

Sensors and switches interfacing

Mobile devices

Consumer electronics

Product Lifecycle

Obsolete status

Potential need to seek replacements or upgrades

Key Reasons to Choose This Product

Easy to interface with most microcontrollers

Supports hot insertion

Provides additional I/O ports through a minimal number of pins

Small form factor suitable for space-constrained applications

Manufactured by Texas Instruments, a trusted industry leader