PCA9539PWRManufacturer: TI Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers 24-TSSOP -40 to 85 | |||
| Partnumber | Manufacturer | Quantity | Availability |
|---|---|---|---|
| PCA9539PWR | TI | 2000 | In Stock |
Description and Introduction
Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers 24-TSSOP -40 to 85 The **PCA9539PWR** from Texas Instruments is a versatile **16-bit I²C-bus I/O expander** designed to enhance system flexibility in microcontroller-based applications. This low-voltage device provides general-purpose remote I/O expansion via the I²C interface, supporting both input and output configurations with programmable polarity inversion.  
Featuring **interrupt output** capability, the PCA9539PWR alerts the host controller of input state changes, reducing the need for continuous polling. Its wide operating voltage range (2.3V to 5.5V) ensures compatibility with various logic levels, making it suitable for mixed-voltage systems.   With **high noise immunity** and **low standby current consumption**, this expander is ideal for power-sensitive applications such as industrial controls, consumer electronics, and embedded systems. The device also includes internal pull-up resistors, simplifying circuit design while maintaining signal integrity.   The PCA9539PWR comes in a compact **TSSOP-24 package**, offering space-efficient integration. Its I²C address selection pins allow multiple devices to coexist on the same bus, enabling scalable I/O expansion.   Engineers benefit from its straightforward configuration and robust performance, making the PCA9539PWR a reliable choice for expanding digital I/O capabilities in modern electronic designs. |
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Application Scenarios & Design Considerations
Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers 24-TSSOP -40 to 85
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