PCA9545APW-TManufacturer: NXP/PHILIPS 4-Channel I2C And SMBus Multiplexer With Interrupt Logic And Reset Functions 20-TSSOP -40 to 85 | |||
| Partnumber | Manufacturer | Quantity | Availability |
|---|---|---|---|
| PCA9545APW-T,PCA9545APWT | NXP/PHILIPS | 682 | In Stock |
Description and Introduction
4-Channel I2C And SMBus Multiplexer With Interrupt Logic And Reset Functions 20-TSSOP -40 to 85 # Introduction to the PCA9545APW-T I²C Multiplexer  
The **PCA9545APW-T** from NXP Semiconductors is a versatile **I²C bus multiplexer** designed to expand the connectivity of I²C-compatible devices. This component enables a single I²C host controller to communicate with multiple downstream I²C buses, effectively resolving address conflicts and simplifying system design.   Featuring **four bidirectional channels**, the PCA9545APW-T allows seamless switching between different I²C branches, supporting both **standard-mode (100 kHz) and fast-mode (400 kHz)** communication speeds. Each channel can be independently selected via I²C commands, ensuring efficient bus management.   The device incorporates **interrupt inputs** for each channel, enabling the host to detect events on downstream devices without continuous polling. Additionally, its **low standby current** makes it suitable for power-sensitive applications.   Housed in a **TSSOP-20 package**, the PCA9545APW-T is ideal for space-constrained designs, including embedded systems, industrial automation, and consumer electronics. Its robust ESD protection ensures reliable operation in demanding environments.   With its ability to simplify complex I²C architectures, the PCA9545APW-T is a valuable solution for designers seeking scalable and efficient I²C bus management. |
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Application Scenarios & Design Considerations
4-Channel I2C And SMBus Multiplexer With Interrupt Logic And Reset Functions 20-TSSOP -40 to 85
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