PCA9538DBR - Texas Instruments

Manufacturer Part Number

PCA9538DBR

Manufacturer

texas-instruments

Introduction

PCA9538DBR is an 8-bit I2C and SMBus I/O expander from Texas Instruments designed for surface mount applications.

Product Features and Performance

8-bit I/O expander

Interface compatibility with I2C and SMBus

Interrupt output facilitates prompt response to I/O changes

Power-on Reset (POR)

Push-pull output type delivering stable output without need for external pull-up

Supports clock frequencies up to 400 kHz

Operates across a range of supply voltages from 2.3V to 5.5V

Built for operating temperatures from -40°C to 85°C

Product Advantages

Increased system flexibility through additional I/O ports

Immediate event response through interrupt feature

High integration compatibility with various microcontrollers via I2C/SMBus

Sturdy output performance with push-pull configuration

Low power consumption suitable for battery-powered applications

Key Technical Parameters

Number of I/O: 8

Clock Frequency: 400 kHz

Voltage - Supply: 2.3V ~ 5.5V

Operating Temperature: -40°C ~ 85°C

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

Quality and Safety Features

Embedded power-on reset functionality to ensure reliable startup

Built to operate reliably under extreme temperature conditions

Compatibility

Compatible with I2C and SMBus protocols

Integrates with various microcontrollers and processors

Application Areas

Embedded Systems

Portable Devices

Consumer Electronics

Automation Systems

Product Lifecycle

Product Status: Obsolete

Note: Users should consider alternatives as the model is nearing discontinuation.

Several Key Reasons to Choose This Product

Expands I/O capabilities significantly without needing additional microcontroller pins

In-built interrupt feature allows for real-time system responsiveness

Supports a broad range of power supply voltages adding to its versatility in deployment

Robust in varying environmental conditions ensuring product reliability

High clock frequency support enhances device communication efficiency