Texas Instruments

PCF8575DW

PCF8575DW Description

The PCF8575DW is a 16-bit I/O expander from Texas Instruments, designed to interface with microcontrollers via the I2C or SMBus interface. This surface-mount device operates at a clock frequency of 400 kHz and has a supply voltage range of 4.5V to 5.5V. With 16 I/O lines, it can source or sink 10mA or 25mA, respectively. The product is obsolete, but it is still available in a tube package. It is REACH unaffected, EAR99, and RoHS3 compliant.

PCF8575DW Features

• 16-bit I/O Expander: Offers a high number of I/O lines for expanding microcontroller capabilities.
• 400 kHz Clock Frequency: Ensures fast data transfer rates for efficient communication.
• I2C and SMBus Interface: Provides compatibility with a wide range of microcontrollers and systems.
• 10mA/25mA Source/Sink Current: Allows for driving various loads with different current requirements.
• 4.5V-5.5V Supply Voltage: Operates within a wide voltage range, making it suitable for various applications.
• Surface Mount: Facilitates integration into compact and space-constrained designs.
• POR Feature: Incorporates power-on reset functionality for reliable operation.
• Interrupt Output: Enables notification of specific events or conditions.

PCF8575DW Applications

The PCF8575DW is ideal for applications where microcontroller I/O expansion is required. Some specific use cases include:

• Industrial Automation: For expanding the number of digital inputs and outputs in control systems.
• Home Automation: To manage a larger number of sensors and actuators in smart home setups.
• Embedded Systems: In devices where additional I/O is needed for communication or control.
• Data Acquisition Systems: For interfacing with multiple digital sensors in monitoring and measurement applications.

Conclusion of PCF8575DW

While the PCF8575DW is classified as obsolete, it remains a robust solution for applications requiring a high number of I/O lines with I2C or SMBus interface. Its wide supply voltage range, fast clock frequency, and interrupt output make it suitable for a variety of digital expansion needs. Despite its obsolescence, it offers a reliable and efficient solution for systems where space is at a premium and I/O expansion is critical.