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PCA9545BPW from NXP,NXP Semiconductors

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PCA9545BPW

Manufacturer: NXP

4-channel I虏C-bus switch with interrupt logic and reset

Partnumber Manufacturer Quantity Availability
PCA9545BPW NXP 1559 In Stock

Description and Introduction

4-channel I虏C-bus switch with interrupt logic and reset The **PCA9545BPW** from NXP Semiconductors is a versatile **4-channel I2C-bus multiplexer** designed to enable communication between a single master device and multiple I2C slave devices. This component is particularly useful in systems where multiple I2C devices share the same bus address, allowing seamless switching between channels without address conflicts.  

Featuring **low on-state resistance** and **bidirectional voltage-level translation**, the PCA9545BPW supports a wide operating voltage range (1.8V to 5.5V), making it compatible with various logic levels. Its interrupt function allows the host to monitor connected devices efficiently, reducing unnecessary polling.  

The device is housed in a **TSSOP-24 package**, ensuring compact integration into space-constrained designs. With **power-on reset functionality**, it defaults to a known state upon startup, enhancing system reliability.  

Applications include **embedded systems, industrial controls, and consumer electronics**, where multiple I2C peripherals—such as sensors, EEPROMs, or displays—must coexist on a single bus. The PCA9545BPW simplifies system architecture while maintaining robust I2C communication.  

Engineers appreciate its **low standby current** and **high noise immunity**, making it a dependable choice for complex I2C bus management. Its straightforward control via I2C commands ensures ease of implementation in diverse designs.

Application Scenarios & Design Considerations

4-channel I虏C-bus switch with interrupt logic and reset

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