PCA9555DWR - Texas Instruments

Manufacturer Part Number

PCA9555DWR

Manufacturer

Texas Instruments

Introduction

I2C and SMBus-compatible interface expander with 16 I/O pins

Product Features and Performance

16 I/O pins expandable via I2C bus

Interrupt output for input change notification

Configurable polarity inversion register

Power-on reset (POR)

Product Advantages

Conserves microcontroller I/Os for other functions

Allows for serial interface to parallel expansion

Supports hot insertion

Key Technical Parameters

Number of I/O: 16

Interface: I2C, SMBus

Interrupt Output: Yes

Output Type: 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

Over-voltage tolerant inputs

Low standby current

Noise filter on SCL/SDA inputs

Compatibility

Interfacing with microcontrollers and processors that utilize I2C or SMBus

Application Areas

Keyboard extensions for microcontrollers

LED indicators and displays

Industrial control systems

Server management

Product Lifecycle

Active product status

No reported discontinuation or obsolescence

Several Key Reasons to Choose This Product

Flexible usage across wide voltage range (2.3V to 5.5V)

High I/O pin count ideal for complex systems

Robust design suitable for industrial applications

Compatible with popular communication protocols

Easy to mount with surface-mount technology

Efficient power management with low standby current

Enables sophisticated system monitoring with interrupt output feature