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PCA8574APW from NXP,NXP Semiconductors

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PCA8574APW

Manufacturer: NXP

Remote 8-bit I/O expander for I虏C-bus with interrupt

Partnumber Manufacturer Quantity Availability
PCA8574APW NXP 12587 In Stock

Description and Introduction

Remote 8-bit I/O expander for I虏C-bus with interrupt The **PCA8574APW** from NXP Semiconductors is a versatile **remote 8-bit I/O expander** designed to enhance microcontroller-based systems. Utilizing the **I²C-bus interface**, this component provides an efficient solution for expanding digital I/O capabilities while minimizing pin usage on the host controller.  

Featuring **quasi-bidirectional ports**, the PCA8574APW simplifies interfacing with sensors, switches, and other peripherals. Each of its **8 I/O pins** can be individually configured as an input or output, offering flexibility in system design. The device operates with a **supply voltage range of 2.3V to 5.5V**, making it compatible with both 3.3V and 5V logic levels.  

A key advantage of the PCA8574APW is its **interrupt output**, which alerts the host microcontroller of input state changes, reducing the need for continuous polling. With a **maximum clock frequency of 400 kHz**, it supports high-speed communication while maintaining low power consumption.  

Housed in a **TSSOP-16 package**, the PCA8574APW is suitable for space-constrained applications. Its robust design and ease of integration make it ideal for industrial control, consumer electronics, and embedded systems requiring expanded I/O functionality.  

By leveraging the I²C-bus, this expander simplifies system architecture while maintaining reliable performance, making it a practical choice for modern electronic designs.

Application Scenarios & Design Considerations

Remote 8-bit I/O expander for I虏C-bus with interrupt

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