PCA9555RGERG4 - Texas Instruments

Manufacturer Part Number

PCA9555RGERG4

Manufacturer

Texas Instruments

Introduction

The PCA9555RGERG4 is an integrated circuit from Texas Instruments designed for I/O expansion in microcontroller systems via the I2C bus.

Product Features and Performance

16-bit I/O port expander

I2C and SMBus interface compatible

Interrupt output feature available

Power-on reset

Open-drain interrupt output

Push-pull output type

Compatible with most microcontrollers

Software configurable as either input or output

Product Advantages

Provides additional I/O ports

Allows for serial interface expansion

Reduces microcontroller pin usage

Improves interface flexibility and functionality

Key Technical Parameters

Number of I/O: 16

Interface: I2C, SMBus

Interrupt Output: Yes

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

Clock Frequency: 400 kHz

Voltage - Supply: 2.3V to 5.5V

Operating Temperature range: -40°C to 85°C

Quality and Safety Features

Integrated power-on reset enhances power-up safety

Designed for operation in harsh temperature environments

Ensures reliable digital signal processing

Compatibility

Compatible with various microcontrollers and processors

Flexible voltage supply range for mixed-voltage systems

Supports standard I2C and SMBus protocols

Application Areas

Industrial control systems

Server management

Robotics and automation

Embedded systems

Signal gating or decoding applications

Product Lifecycle

Product Status: Discontinued at Digi-Key

Check with manufacturer for direct supply or alternative solutions

Consider possible replacements or upgrades if planning long-term production

Several Key Reasons to Choose This Product

Enhanced system IO capacity without major redesign

Supports common communication protocols for ease of integration

Robust operation in extreme temperature conditions

Software configurable ports provide design flexibility

Increases the efficiency of microcontroller or processor without extra GPIOs

Proven performance from reliable manufacturer Texas Instruments

End-of-life support from manufacturer with potential for sourcing alternatives