The PCA9543APW is a high-quality, 2-channel I²C-bus multiplexer with an interrupt logic designed by Texas Instruments. This integrated circuit (IC) allows two downstream I²C channels to be controlled by a single I²C bus, providing a seamless and efficient way to manage multiple I²C devices with identical addresses or to isolate bus segments to enhance system reliability and performance.

Key Features

• 2-Channel Multiplexing: The PCA9543APW offers two bidirectional channels for I²C-bus and SMBus applications, enabling the connection of multiple devices and subsystems to a common I²C bus without address conflicts.
• Interrupt Function: Each channel of the PCA9543APW has a dedicated interrupt input which can be configured to inform the master controller of an event on the I²C bus, enhancing the efficiency of the system by reducing the need for continuous polling.
• High Noise Filter: This IC includes a built-in noise filter on the SDA/SCL lines, ensuring signal integrity even in electrically noisy environments.
• Low Standby Current: Designed for power-sensitive applications, the PCA9543APW features a low standby current, making it suitable for battery-operated and power-conscious designs.
• Wide Operating Voltage: The device operates across a wide range of supply voltages from 2.3V to 5.5V, accommodating various system-level power supplies.
• Package: The PCA9543APW is offered in a TSSOP-16 (Thin Shrink Small Outline Package) that is optimal for space-constrained applications.

Applications

The PCA9543APW is ideal for a range of applications, particularly where multiple I²C devices with the same address need to be connected to a single I²C bus. It is commonly used in:

• Server and telecom infrastructure
• Industrial control systems
• Consumer electronics
• Networking equipment
• Multi-zone audio systems

Texas Instruments' commitment to innovation and quality makes the PCA9543APW a reliable and essential component for complex electronic systems requiring robust I²C bus management.