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PCA9539RHLR from TI,Texas Instruments

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PCA9539RHLR

Manufacturer: TI

REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

Partnumber Manufacturer Quantity Availability
PCA9539RHLR TI 105 In Stock

Description and Introduction

REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS The **PCA9539RHLR** from Texas Instruments is a versatile 16-bit I/O expander designed to enhance system flexibility in embedded applications. This integrated circuit (IC) operates via the I²C-bus/SMBus interface, enabling seamless communication with microcontrollers while minimizing GPIO usage.  

Featuring low-voltage operation (1.65V to 5.5V), the PCA9539RHLR is suitable for a broad range of applications, including industrial controls, consumer electronics, and IoT devices. Its 16 configurable I/O pins can be individually set as inputs or outputs, providing adaptability for interfacing with sensors, switches, LEDs, and other peripherals.  

Key advantages include interrupt functionality, which alerts the host controller of input state changes, reducing polling overhead. The device also incorporates internal pull-up resistors, simplifying circuit design. With a compact **20-pin VQFN (RHL) package**, it is ideal for space-constrained designs.  

The PCA9539RHLR is backward-compatible with the PCA9555, ensuring easy migration for existing designs. Its robust ESD protection and low standby current make it a reliable choice for power-sensitive applications.  

Engineers seeking scalable I/O expansion with minimal host interaction will find the PCA9539RHLR a practical solution for optimizing system performance and reducing complexity.

Application Scenarios & Design Considerations

REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

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