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PCA9554A from PHILIPS

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PCA9554A

Manufacturer: PHILIPS

8-bit I2C and SMBus I/O port with interrupt

Partnumber Manufacturer Quantity Availability
PCA9554A PHILIPS 45 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.

Application Scenarios & Design Considerations

8-bit I2C and SMBus I/O port with interrupt
Partnumber Manufacturer Quantity Availability
PCA9554A NXP 74 In Stock

Description and Introduction

8-bit I2C and SMBus I/O port with interrupt The **PCA9554A** from NXP Semiconductors is an 8-bit I²C-bus and SMBus I/O expander designed to enhance system flexibility by providing additional GPIO (General Purpose Input/Output) ports. This CMOS-based component is widely used in applications requiring efficient control of multiple peripheral devices with minimal microcontroller pins.  

Featuring an I²C interface, the PCA9554A supports clock frequencies up to 400 kHz, ensuring fast and reliable communication. Each of its eight I/O pins can be independently configured as an input or output, with internal pull-up resistors simplifying circuit design. The device also includes interrupt functionality, alerting the host controller of input state changes, reducing polling overhead.  

Operating at a voltage range of 2.3V to 5.5V, the PCA9554A is suitable for both low-power and standard applications. Its robust ESD protection ensures reliability in industrial and consumer electronics. Common uses include LED dimming, keypad scanning, and sensor interfacing.  

With a compact package and low standby current consumption, the PCA9554A is an efficient solution for expanding I/O capabilities in space-constrained designs. Its compatibility with industry-standard protocols makes it a versatile choice for embedded systems.

Application Scenarios & Design Considerations

8-bit I2C and SMBus I/O port with interrupt

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