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PCA9549D from NXP,NXP Semiconductors

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PCA9549D

Manufacturer: NXP

Octal bus switch with individually I2C-bus controlled enables

Partnumber Manufacturer Quantity Availability
PCA9549D NXP 4980 In Stock

Description and Introduction

Octal bus switch with individually I2C-bus controlled enables The **PCA9549D** from NXP Semiconductors is a versatile **I²C bus multiplexer** designed to expand the capabilities of I²C communication systems. This component allows a single master device to interface with multiple downstream I²C buses, enabling efficient management of multiple slave devices sharing the same address space.  

Featuring **four bidirectional channels**, the PCA9549D provides seamless switching between different I²C segments while maintaining signal integrity. It supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C operations, making it suitable for a wide range of applications, including industrial control, embedded systems, and consumer electronics.  

The device includes **interrupt functionality**, allowing the master controller to detect and respond to events on any of the downstream buses. Additionally, its low standby current consumption ensures energy efficiency in power-sensitive designs.  

With a compact **SO16 package**, the PCA9549D is optimized for space-constrained applications. Its robust design ensures reliable performance in noisy environments, making it a dependable solution for complex I²C bus architectures.  

Engineers seeking to simplify multi-bus I²C communication will find the PCA9549D an effective and scalable solution for managing multiple peripherals efficiently.

Application Scenarios & Design Considerations

Octal bus switch with individually I2C-bus controlled enables

Alternative Part Number

  • TCA9549D --: Pin-compatible I2C switch with similar 8-channel functionality and same SO package, direct functional replacement.
  • PCA9548AD --: Same family 8-channel I2C switch in SO package, widely available and electrically similar though with slightly different reset behavior.
  • TCA9548AD --: 8-channel I2C multiplexer in SO package, functionally equivalent alternative from a different vendor series.

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