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PCA9539DBQR from TI,Texas Instruments

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PCA9539DBQR

Manufacturer: TI

Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers 24-SSOP -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9539DBQR TI 92 In Stock

Description and Introduction

Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers 24-SSOP -40 to 85 The **PCA9539DBQR** from Texas Instruments is a versatile, low-voltage 16-bit I²C-bus I/O expander designed to enhance system flexibility in embedded applications. This component enables microcontroller-based designs to efficiently manage additional digital inputs and outputs while minimizing pin count on the host controller.  

Featuring an **I²C interface**, the PCA9539DBQR supports clock frequencies up to 400 kHz, ensuring seamless communication with a wide range of microcontrollers. Each of its 16 I/O pins can be independently configured as an input or output, providing adaptability for various interfacing needs. The device also includes internal pull-up resistors, simplifying circuit design by reducing external component requirements.  

Operating at a **voltage range of 1.65V to 5.5V**, the PCA9539DBQR is compatible with both 3.3V and 5V systems, making it suitable for mixed-voltage environments. Its interrupt output feature allows efficient event-driven processing, reducing the need for continuous polling.  

Housed in a compact **SSOP-24 package**, this I/O expander is ideal for space-constrained applications such as industrial controls, consumer electronics, and IoT devices. With its robust performance and ease of integration, the PCA9539DBQR offers a reliable solution for expanding digital I/O capabilities in modern electronic systems.

Application Scenarios & Design Considerations

Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers 24-SSOP -40 to 85

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