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PCA9545APWR from PHILIPS

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PCA9545APWR

Manufacturer: PHILIPS, TI

4-Channel I2C And SMBus Multiplexer With Interrupt Logic And Reset Functions 20-TSSOP -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9545APWR PHILIPS, TI 4059 In Stock

Description and Introduction

4-Channel I2C And SMBus Multiplexer With Interrupt Logic And Reset Functions 20-TSSOP -40 to 85 The **PCA9545APWR** from Texas Instruments is a versatile **4-channel I²C multiplexer** designed to manage multiple I²C bus segments efficiently. This component enables communication between a single master device and up to four downstream I²C buses, allowing seamless expansion of peripheral connectivity in complex systems.  

Featuring **bidirectional voltage-level translation**, the PCA9545APWR supports mixed-voltage applications, ensuring compatibility between devices operating at different logic levels. Its low **on-resistance** minimizes signal distortion, preserving data integrity across channels.  

The device includes **interrupt inputs** for each channel, enabling efficient event-driven communication and reducing the need for continuous polling. Additionally, its **software-configurable channel selection** provides flexibility in system design, making it ideal for applications such as industrial control, embedded systems, and multi-sensor environments.  

Housed in a compact **TSSOP-20 package**, the PCA9545APWR is optimized for space-constrained designs while maintaining robust performance. With a wide operating voltage range and low standby current, it is well-suited for power-sensitive applications.  

Engineers value the PCA9545APWR for its **reliability, ease of integration, and enhanced I²C bus management**, making it a practical solution for expanding I²C connectivity in modern electronic systems.

Application Scenarios & Design Considerations

4-Channel I2C And SMBus Multiplexer With Interrupt Logic And Reset Functions 20-TSSOP -40 to 85

Alternative Part Number

  • TCA9545APWR --: Pin-compatible 4-channel I2C switch with same PWR package and address scheme; direct functional replacement from TI.
  • PCA9545APW --: Same PCA9545A function from the original Philips/NXP lineage in TSSOP package; drop-in equivalent with identical register set.
  • PCA9546APWR --: Similar 4-channel I2C switch in same TSSOP package; minor interrupt feature differences but usable with firmware review.

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