The PCA9544ABS,118 is a high-quality, versatile integrated circuit (IC) manufactured by NXP Semiconductors, a leader in the industry known for its innovative and reliable products. This IC is a 4-channel I²C-bus multiplexer with interrupt logic, designed to provide 2:1 multiplexing for any I²C-compatible device.

Key Features

• Multiple Channel Access: The PCA9544ABS,118 allows for four downstream channels to be selected from a single upstream I²C bus, enabling multiple devices with the same address to be connected to a single bus system.
• Interrupt Functionality: Each channel of the multiplexer is equipped with an interrupt input which can be used by the downstream device to gain the attention of the host controller, enhancing the communication efficiency on the I²C bus.
• Low Standby Current: The device is designed for low power consumption, with a standby current that is negligible, making it suitable for power-sensitive applications.
• Wide Operating Voltage: It operates across a wide voltage range from 2.5V to 5.5V, allowing it to accommodate various system voltages and ensuring compatibility with both standard and low-voltage I²C devices.

Applications

The PCA9544ABS,118 is ideal for a variety of applications where multiple I²C devices need to be accessed. It is commonly used in:

• Server motherboards
• Networking equipment such as routers and switches
• Industrial control systems
• Consumer electronics

Technical Specifications

Some of the technical specifications of the PCA9544ABS,118 include:

• 4-channel I²C-bus multiplexer with interrupt logic
• Channel selection via I²C bus
• Active LOW interrupt input
• Compliant with I²C-bus Fast-mode Plus
• Packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package)

With its robust design and flexibility, the PCA9544ABS,118 is an excellent choice for designers looking to expand the capabilities of their I²C bus systems while maintaining seamless communication between multiple devices.