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PCA9539BS from NXP,NXP Semiconductors

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PCA9539BS

Manufacturer: NXP

16-bit I虏C-bus and SMBus low power I/O port with interrupt and reset

Partnumber Manufacturer Quantity Availability
PCA9539BS NXP 5490 In Stock

Description and Introduction

16-bit I虏C-bus and SMBus low power I/O port with interrupt and reset The **PCA9539BS** from NXP Semiconductors is a versatile **I²C-bus controlled 16-bit I/O expander** designed to enhance system flexibility in embedded applications. This low-voltage CMOS device provides general-purpose remote I/O expansion via the I²C interface, supporting both input and output configurations.  

Featuring **interrupt output** functionality, the PCA9539BS can alert the host microcontroller of input state changes, reducing the need for continuous polling. It operates within a **2.3V to 5.5V** supply range, making it compatible with a wide variety of microcontrollers and logic levels.  

The device includes internal pull-up resistors, simplifying circuit design by eliminating external components. With its **high noise immunity** and **low standby current consumption**, the PCA9539BS is well-suited for power-sensitive applications such as industrial control, consumer electronics, and IoT devices.  

Each I/O port can be independently configured as an input or output, offering flexibility in system design. The PCA9539BS also supports **hot insertion**, ensuring stable operation in dynamic environments.  

As a reliable solution for expanding I/O capabilities, the PCA9539BS combines performance with ease of integration, making it a practical choice for designers seeking efficient peripheral management.

Application Scenarios & Design Considerations

16-bit I虏C-bus and SMBus low power I/O port with interrupt and reset

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