Texas Instruments

PCF8575DBQR  

I/O Expanders

PCF8575DBQR Description

The PCF8575DBQR is a 16-bit I/O expander from Texas Instruments, designed to operate with I2C and SMBus interfaces. It features a clock frequency of 400 kHz, allowing for efficient data transfer in various applications. This device is surface-mountable and has a supply voltage range of 2.5V to 5.5V, making it suitable for a wide range of systems. With a current output source/sink capability of 1mA and 25mA, it can drive various types of loads. The PCF8575DBQR also includes an interrupt output, enhancing its functionality in interrupt-driven systems. It is compliant with RoHS3 and REACH regulations, ensuring environmental compliance.

PCF8575DBQR Features

• 16-bit I/O expander: Provides 16 individually programmable I/O lines for expanding the capabilities of microcontrollers.
• 400 kHz clock frequency: Supports high-speed data transfer for efficient communication.
• 2.5V to 5.5V supply voltage: Operates over a wide voltage range, making it compatible with various power sources.
• 1mA and 25mA current sourcing/sinking: Capable of driving different types of loads, enhancing its versatility.
• Interrupt output: Facilitates interrupt-driven applications, improving system responsiveness.
• I2C and SMBus interfaces: Enables communication with a wide range of devices using these popular protocols.
• POR feature: Provides power-on reset functionality, ensuring reliable startup and operation.

PCF8575DBQR Applications

The PCF8575DBQR is ideal for applications requiring expansion of I/O capabilities, such as:

• Industrial control systems: Use the expander to add more inputs and outputs for sensors and actuators.
• Home automation: Integrate with microcontrollers to control lighting, heating, and security systems.
• Portable electronics: Utilize the device to manage user interface elements like buttons and LEDs in mobile devices.
• Automotive systems: Employ the expander to interface with various sensors and control modules in vehicles.

Conclusion of PCF8575DBQR

The PCF8575DBQR is a versatile I/O expander that offers high-speed communication, wide voltage range, and robust current sourcing/sinking capabilities. Its unique features, such as the interrupt output and POR, make it suitable for a variety of applications in different industries. While it is now considered obsolete, its performance benefits and compatibility with I2C and SMBus interfaces make it a valuable component for legacy systems and specific applications where its capabilities are required.

PCF8575DBQR Documents

Download datasheets and manufacturer documentation for PCF8575DBQR

Datasheets :

PCF8575      

PCN Obsolescence/ EOL :

EOL- 08/May/2023      

HTML Datasheet :

PCF8575      

PCN Design/Specification :

PCF8575 03/Oct/2018