PCA9557DT - Texas Instruments

Manufacturer Part Number

PCA9557DT

Manufacturer

Texas Instruments

Introduction

The PCA9557DT is an 8-bit I/O expander with an I2C and SMBus interface from Texas Instruments, designed for GPIO expansion in microcontroller systems.

Product Features and Performance

8-bit I/O expander

I2C and SMBus compatible interface

No interrupt output

Features Power-on Reset (POR)

Output types include open drain and push-pull

Supports output source/sink current of 10mA and 25mA

Operates up to 400 kHz clock frequency

Supports 2.3V to 5.5V supply voltage

-40°C to 85°C operating temperature range

Surface mount package for PCB assembly

Product Advantages

Enables GPIO expansion for microcontrollers with limited I/O pins

Flexible I2C/SMBus interface for easy integration

Broad voltage range compatibility

Suitable for a wide range of operating temperatures

Compact 16-SOIC package saves board space

Key Technical Parameters

I/O count: 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

Package: 16-SOIC

Quality and Safety Features

Strict adherence to semiconductor quality and safety standards

Provides reliable performance in a wide range of environmental conditions

Compatibility

Compatible with a broad range of microcontrollers and processors via I2C/SMBus interface

Suitable for mixed-voltage applications

Application Areas

Microcontroller system expansion

Embedded systems

Industrial control systems

Consumer electronics interfaces

Product Lifecycle

Obsolete

Consider checking for replacements or upgrades

Several Key Reasons to Choose This Product

Enables easy expansion of microcontroller I/O capabilities

Support for both open drain and push-pull output increases flexibility in control applications

Wide voltage range support ensures compatibility with various systems

Operational in a wide range of environmental temperatures, ensuring reliability

Compact package suitable for space-constrained applications