The PCA9544APW/G is a high-performance, low-voltage 4-channel I²C-bus switch with an interrupt logic, designed and manufactured by NXP Semiconductors. This integrated circuit allows four downstream I²C buses to be controlled by a single upstream I²C bus, making it an ideal solution for applications where multiple I²C devices with the same address need to be accessed separately.

Key Features

• Channel Selection: The PCA9544APW/G provides four bidirectional translating switches that can select any combination of I²C-bus channels, active HIGH through an I²C-bus interface.
• Interrupt Function: Each channel can be enabled or disabled via software, and an interrupt input is provided for each of the downstream I²C buses. This allows for efficient communication with peripheral devices that require attention, without the need for constant polling.
• Low Standby Current: With a low standby current, this device is suitable for power-sensitive applications, ensuring minimal power consumption when idle.
• Wide Operating Voltage Range: The PCA9544APW/G operates across a wide voltage range from 2.3V to 5.5V, accommodating various system requirements.

Applications

The PCA9544APW/G is versatile and can be used in a variety of applications, such as:

• Server and telecom infrastructure
• Industrial control systems
• Multi-master I²C applications
• Peripheral power management
• Medical equipment

Technical Specifications

With its robust feature set and flexibility, the PCA9544APW/G by NXP is a reliable choice for designers looking to expand their I²C-bus capabilities in complex multi-device environments.