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PCA9544AD from PHILIPS

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PCA9544AD

Manufacturer: PHILIPS

PCA9544A; 4-channel I²C multiplexer with interrupt logic

Partnumber Manufacturer Quantity Availability
PCA9544AD PHILIPS 28 In Stock

Description and Introduction

PCA9544A; 4-channel I²C multiplexer with interrupt logic The **PCA9544AD** from Philips is a versatile **I²C bus multiplexer** designed to enable communication between multiple I²C-compatible devices over a single bus. This component is particularly useful in systems where multiple I²C slave devices share the same address, or when isolation between different segments of the bus is required.  

Featuring **four bidirectional channels**, the PCA9544AD allows a master device to select one of four downstream I²C buses, ensuring seamless data transfer without address conflicts. The device operates with a **supply voltage range of 2.3V to 5.5V**, making it compatible with a wide variety of low-voltage and standard logic systems.  

Key functionalities include **interrupt handling**, which notifies the master controller when a downstream device requires attention, and **low standby current consumption**, enhancing energy efficiency in power-sensitive applications. The PCA9544AD also supports **hot insertion**, reducing the risk of bus contention during dynamic system reconfiguration.  

With its compact **TSSOP-20 package**, the PCA9544AD is well-suited for space-constrained designs, including embedded systems, industrial controls, and consumer electronics. Its robust performance and ease of integration make it a reliable choice for expanding I²C bus capabilities in complex electronic systems.

Application Scenarios & Design Considerations

PCA9544A; 4-channel I²C multiplexer with interrupt logic
Partnumber Manufacturer Quantity Availability
PCA9544AD NXP 15 In Stock

Description and Introduction

PCA9544A; 4-channel I²C multiplexer with interrupt logic The **PCA9544AD** 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 address, allowing seamless switching between them without conflicts.  

Featuring **bidirectional voltage-level translation**, the PCA9544AD supports interfacing between devices operating at different voltage levels (1.8V to 5.5V), enhancing compatibility across mixed-voltage systems. Each of its four channels can be independently selected via I²C commands, providing flexibility in managing multiple peripherals.  

The device includes **interrupt inputs** for each channel, enabling efficient event-driven communication by alerting the master when a slave requires attention. Additionally, its **low standby current consumption** makes it suitable for power-sensitive applications.  

With robust **ESD protection** and a compact **TSSOP-20 package**, the PCA9544AD is ideal for embedded systems, industrial controls, and consumer electronics where reliable I²C expansion is needed. Its straightforward integration and reliable performance make it a preferred choice for designers seeking efficient I²C bus management.

Application Scenarios & Design Considerations

PCA9544A; 4-channel I²C multiplexer with interrupt logic

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