Texas Instruments

PCA9555DWR  

I/O Expanders

The Texas Instruments PCA9555DWR is a 16-bit I2C bus and SMBus 4-port I/O expander with interrupt support. It is designed to provide a flexible and efficient solution for expanding the I/O capabilities of microcontroller-based systems.

Description:

The PCA9555DWR is a 16-bit I/O expander that features four independent ports, each with eight I/O pins. The device is controlled via the I2C bus or SMBus interface, allowing for easy integration with microcontrollers and other I2C-compatible devices. The device also features an interrupt output that can be used to signal the host microcontroller when a change in I/O state occurs.

Features:

1. 16-bit I/O expander with four independent ports
2. I2C bus and SMBus interface for easy integration
3. Configurable direction control for each I/O pin
4. Configurable pull-up resistors for each I/O pin
5. Interrupt output to signal changes in I/O state
6. Wide operating voltage range (2.5V to 5.5V)
7. Small package size (TSSOP-28)

Applications:

The PCA9555DWR is suitable for a wide range of applications where I/O expansion is required. Some potential applications include:

1. Industrial control systems: The device can be used to expand the number of digital inputs and outputs in industrial control systems, allowing for more complex control and monitoring capabilities.
2. Home automation: The PCA9555DWR can be used to control and monitor various devices in a home automation system, such as lights, switches, and sensors.
3. Robotics: The device can be used to control and monitor the various actuators and sensors in a robotic system, such as motors, servos, and limit switches.
4. Medical equipment: The PCA9555DWR can be used to expand the I/O capabilities of medical equipment, such as patient monitoring devices and diagnostic equipment.
5. Automotive applications: The device can be used to control and monitor various sensors and actuators in automotive systems, such as engine control units, lighting systems, and infotainment systems.

Overall, the Texas Instruments PCA9555DWR is a versatile and efficient I/O expander that can be easily integrated into a wide range of microcontroller-based systems. Its features, such as configurable direction control, pull-up resistors, and interrupt support, make it a valuable tool for expanding the capabilities of these systems.

PCA9555DWR Documents

Download datasheets and manufacturer documentation for PCA9555DWR

Datasheets :

PCA9555      

HTML Datasheet :

PCA9555      

PCN Design/Specification :

Datasheet Update 25/Jun/2014       PCA9555 04/Sep/2018