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PCA9673BQ from NXP,NXP Semiconductors

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PCA9673BQ

Manufacturer: NXP

Remote 16-bit I/O expander for Fm I2C-bus with interrupt and reset

Partnumber Manufacturer Quantity Availability
PCA9673BQ NXP 670 In Stock

Description and Introduction

Remote 16-bit I/O expander for Fm I2C-bus with interrupt and reset The **PCA9673BQ** from NXP Semiconductors is a versatile 8-bit I/O expander designed to enhance system flexibility in microcontroller-based applications. Utilizing the I²C-bus interface, it allows for efficient communication with minimal wiring, making it ideal for space-constrained designs.  

This component features **8 quasi-bidirectional I/O pins**, each configurable as an input or output, enabling seamless integration with sensors, switches, and other peripherals. Its **low standby current consumption** ensures energy efficiency, while the **interrupt output** pin facilitates real-time monitoring of input changes, reducing the need for continuous polling.  

The PCA9673BQ operates across a **wide voltage range (2.3V to 5.5V)**, supporting compatibility with various logic levels. With built-in **noise filtering** and robust ESD protection, it delivers reliable performance in industrial, automotive, and consumer applications.  

Designed for ease of use, the PCA9673BQ simplifies system expansion without requiring additional GPIO pins from the host microcontroller. Its compact **HVQFN16 package** ensures a small footprint, making it suitable for high-density PCB layouts.  

Whether used in display control, keypad interfacing, or general-purpose I/O expansion, the PCA9673BQ provides a cost-effective and scalable solution for modern embedded systems.

Application Scenarios & Design Considerations

Remote 16-bit I/O expander for Fm I2C-bus with interrupt and reset

Alternative Part Number

  • TCA9548APWR --: I2C bus switch/multiplexer with similar I2C expander functionality and wide availability as a functional alternative.
  • PCF8574AT --: I2C I/O expander from a different NXP series offering comparable GPIO expansion for many PCA9673 use cases.
  • MCP23017-E/SS --: 16-bit I2C I/O expander with similar interface and pin-count coverage, suitable as a cross-vendor replacement.

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