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PCA9555RHLR from TI,Texas Instruments

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PCA9555RHLR

Manufacturer: TI

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9555RHLR TI 135 In Stock

Description and Introduction

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85 The **PCA9555RHLR** from Texas Instruments is a versatile **16-bit I/O expander** designed to enhance system flexibility by providing additional GPIO (General-Purpose Input/Output) ports for microcontrollers or processors. This IC communicates via the **I²C-bus/SMBus interface**, enabling seamless integration into embedded systems while minimizing pin usage on the host controller.  

Featuring **16 programmable I/O pins**, the PCA9555RHLR can be individually configured as inputs or outputs, supporting both push-pull and open-drain output modes. Its interrupt output pin allows efficient event-driven monitoring, reducing the need for continuous polling. With a wide **operating voltage range (2.3V to 5.5V)**, it is compatible with various logic levels, making it suitable for mixed-voltage applications.  

The device includes internal pull-up resistors, simplifying circuit design while maintaining low power consumption. Its **small QFN package (RHL-24)** ensures a compact footprint, ideal for space-constrained designs. Applications range from industrial controls and consumer electronics to IoT devices, where expanding I/O capabilities is essential.  

The PCA9555RHLR offers reliable performance with built-in noise filtering and latch-up protection, ensuring robust operation in demanding environments. Its ease of configuration and compatibility with standard I²C protocols make it a practical choice for designers seeking scalable I/O expansion.

Application Scenarios & Design Considerations

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85

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