The PCA9546AD is a robust and versatile 4-channel I2C-bus switch with reset functionality, designed and manufactured by Texas Instruments. This integrated circuit is engineered to provide seamless communication and connectivity solutions for various applications requiring the extension of the I2C-bus by enabling multiple I2C devices to be connected to a single bus. The PCA9546AD is particularly suitable for applications where address conflicts or limited bus capacity would otherwise present a significant challenge.

Key Features

• Four bidirectional translating switches: The PCA9546AD offers four independent channels that allow connection to four different I2C slave or master devices.
• Low standby current: Designed with power efficiency in mind, the device consumes minimal standby current, making it ideal for power-sensitive applications.
• Active-Low reset input: The inclusion of an active-low reset input allows the PCA9546AD to be reset through external hardware, ensuring reliable operation and recovery from fault conditions.
• 5 V tolerant inputs: The device's inputs are tolerant to 5 V, even when powered down, providing added flexibility and compatibility with various logic levels.
• Channel selection via I2C-bus: Channels can be selected or deselected through the I2C-bus, allowing for dynamic configuration and optimization of the I2C network.
• No glitch on power-up: The PCA9546AD is designed to power up without any glitch, ensuring a stable start-up and reducing the risk of unintended operations.

Applications

The versatility of the PCA9546AD makes it an excellent choice for a wide range of applications, including:

• Server systems where multiple I2C devices need to be managed.
• Industrial control systems requiring robust I2C switching capabilities.
• Consumer electronics that need to extend I2C-bus capabilities.
• Telecommunications equipment that demands reliable I2C-bus expansion.

Package and Quality

The PCA9546AD is available in a small 16-pin TSSOP (Thin Shrink Small Outline Package) that is suitable for space-constrained applications. Texas Instruments is committed to maintaining the highest quality standards, ensuring that the PCA9546AD meets stringent industry requirements and is suitable for use in a wide range of commercial and industrial environments.