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PCF8574PW from TI,Texas Instruments

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PCF8574PW

Manufacturer: TI

Remote 8-Bit I/O Expander for I2C-Bus

Partnumber Manufacturer Quantity Availability
PCF8574PW TI 500 In Stock

Description and Introduction

Remote 8-Bit I/O Expander for I2C-Bus The PCF8574PW is a versatile and widely used I/O expander integrated circuit (IC) designed to enhance the input/output capabilities of microcontrollers. Manufactured in a TSSOP-16 package, this IC provides an 8-bit quasi-bidirectional port that can interface with I²C-bus protocols, making it ideal for applications requiring additional GPIO pins without increasing microcontroller complexity.  

Operating at a voltage range of 2.5V to 6V, the PCF8574PW is compatible with various logic levels, ensuring seamless integration with different microcontroller families. Its I²C interface supports clock frequencies up to 400 kHz, enabling efficient communication in embedded systems. Each I/O pin can independently function as an input or output, simplifying circuit design for tasks such as keypad scanning, LED driving, or sensor interfacing.  

A key advantage of the PCF8574PW is its interrupt output feature, which alerts the host microcontroller when an input state changes, reducing the need for continuous polling. This enhances system efficiency, particularly in power-sensitive applications.  

With its compact form factor and straightforward implementation, the PCF8574PW is a reliable solution for expanding I/O capabilities in industrial control, consumer electronics, and automation projects. Its robust performance and ease of use make it a preferred choice among engineers and hobbyists alike.

Application Scenarios & Design Considerations

Remote 8-Bit I/O Expander for I2C-Bus

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