PCA9554AManufacturer: PHILIPS, NXP 8-bit I2C and SMBus I/O port with interrupt |
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| Partnumber | Manufacturer | Quantity | Availability |
|---|---|---|---|
| PCA9554A | PHILIPS, NXP | 119 | In Stock |
Description and Introduction
8-bit I2C and SMBus I/O port with interrupt The **PCA9554A** from Philips is an advanced **8-bit I/O expander** designed to enhance the input/output capabilities of microcontrollers and other digital systems. Utilizing the **I²C-bus interface**, this component provides a simple and efficient way to add extra I/O ports with minimal wiring, making it ideal for space-constrained applications.  
Featuring **low standby current consumption**, the PCA9554A is well-suited for **battery-powered devices** and energy-efficient designs. Each of its eight I/O pins can be independently configured as an input or output, offering flexibility in system integration. The device also includes **interrupt functionality**, allowing the host controller to be alerted when input states change, reducing the need for continuous polling.   With an **operating voltage range of 2.3V to 5.5V**, the PCA9554A is compatible with a wide variety of logic levels, ensuring seamless integration into mixed-voltage systems. Its robust design includes **internal pull-up resistors**, further simplifying circuit implementation.   Common applications include **sensor interfaces, keypad scanning, LED control, and general-purpose I/O expansion**. The PCA9554A is a reliable solution for designers seeking to extend system functionality while maintaining a compact and efficient design. Its ease of use and versatility make it a preferred choice in embedded and industrial applications. |
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Application Scenarios & Design Considerations
8-bit I2C and SMBus I/O port with interrupt
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Alternative Part Number
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