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PCA9546AD from PHILIPS

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PCA9546AD

Manufacturer: PHILIPS, NXP, NXP

4-channel I2C-bus switch with reset

Partnumber Manufacturer Quantity Availability
PCA9546AD PHILIPS, NXP, NXP 4105 In Stock

Description and Introduction

4-channel I2C-bus switch with reset The **PCA9546AD** from NXP Semiconductors is a versatile **4-channel I²C-bus multiplexer** designed to enable communication between multiple I²C devices sharing the same bus. This integrated circuit (IC) simplifies system design by allowing a single master to control up to four separate I²C buses, eliminating address conflicts and enhancing signal integrity.  

Featuring **low on-resistance switches**, the PCA9546AD ensures minimal voltage drop and power loss, making it ideal for power-sensitive applications. It supports **bidirectional voltage-level translation**, accommodating mixed-voltage systems (1.8V to 5.5V), which enhances compatibility across different logic levels.  

The device includes **interrupt inputs** for each channel, enabling efficient event-driven communication. Its **software-configurable channel selection** allows dynamic switching between I²C buses, providing flexibility in multi-device environments. Additionally, the PCA9546AD incorporates **power-up reset functionality**, ensuring a predictable state upon initialization.  

Common applications include **sensor hubs, server systems, industrial automation, and consumer electronics**, where multiple I²C peripherals must coexist without interference. With its robust performance and compact footprint, the PCA9546AD is a reliable solution for expanding I²C connectivity in complex embedded systems.  

Engineers appreciate its ease of integration and compliance with **I²C Fast-mode Plus (1 MHz) specifications**, making it a preferred choice for high-performance designs.

Application Scenarios & Design Considerations

4-channel I2C-bus switch with reset

Alternative Part Number

  • TCA9546APWR --: Pin-compatible 4-channel I2C switch with same address scheme and functionality, widely available and actively supported.
  • PCA9546APW --: NXP is the successor to Philips' semiconductor business, so this is the direct same-silicon equivalent in a TSSOP package.
  • PCA9546ADR --: Second-source 4-channel I2C multiplexer with identical register map and voltage range, suitable as a drop-in replacement.
  • TCA9546ADR --: SOIC-packaged 4-channel I2C multiplexer from TI with equivalent functionality and compatible control interface.

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