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PCA9554DB from PHILIPS

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PCA9554DB

Manufacturer: PHILIPS

8-bit I虏C-bus and SMBus I/O port with interrupt

Partnumber Manufacturer Quantity Availability
PCA9554DB PHILIPS 705 In Stock

Description and Introduction

8-bit I虏C-bus and SMBus I/O port with interrupt The **PCA9554DB** from Philips is an advanced **8-bit I²C-bus and SMBus I/O expander**, designed to enhance the functionality of microcontrollers by providing additional general-purpose input/output (GPIO) ports. This versatile component is widely used in applications requiring expanded I/O capabilities, such as industrial control systems, consumer electronics, and embedded designs.  

Featuring an **I²C-bus/SMBus-compatible interface**, the PCA9554DB simplifies communication with host controllers while supporting bidirectional data transfer. Each of its eight I/O pins can be independently configured as an input or output, offering flexibility in system design. The device also includes interrupt functionality, allowing efficient event-driven operation by signaling changes in input states.  

With a **wide operating voltage range (2.3V to 5.5V)**, the PCA9554DB is compatible with various logic levels, making it suitable for mixed-voltage systems. Its low standby current consumption ensures energy efficiency, particularly in battery-powered applications.  

Housed in a **TSSOP-16 package**, the PCA9554DB provides a compact footprint for space-constrained designs. Its robust performance, ease of integration, and reliable operation make it a preferred choice for engineers seeking scalable I/O expansion solutions.  

For detailed specifications and application guidelines, refer to the official datasheet.

Application Scenarios & Design Considerations

8-bit I虏C-bus and SMBus I/O port with interrupt

Alternative Part Number

  • TCA9554APWR --: Pin-compatible 8-bit I2C/SMBus I/O expander with the same register set and address scheme, widely available and a direct functional drop-in for the PCA9554.
  • PCF8574APW --: Classic 8-bit I2C I/O expander from the original Philips/NXP lineage, similar function and package, though it lacks the PCA9554 interrupt output so firmware changes may be needed.
  • MAX7311AUG+ --: 16-bit I2C I/O expander with interrupt and configurable addresses; offers more ports than needed but can replace the PCA9554 in designs requiring extra I/O with minor software adaptation.

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