Product Overview: PCA9545PW from NXP

The PCA9545PW is a high-quality, 4-channel I2C-bus switch with interrupt logic, designed and manufactured by NXP Semiconductors. This integrated circuit (IC) is an essential component for applications that require multiple I2C devices with the same address to be connected to a single I2C bus. The PCA9545PW allows for seamless communication by providing four separate I2C-bus channels that can be selected via the I2C-bus itself.

Key Features

• Multi-Channel I2C Switching: The device features 4 bidirectional translating switches that can connect I2C-bus masters to downstream slaves.
• Channel Selection: The active channel can be selected through an I2C-bus write operation, enabling easy and flexible access to multiple I2C devices.
• Interrupt Logic: Each switch has an interrupt input that can be configured to alert the upstream master when an event occurs on the downstream I2C bus.
• Power Supply: The PCA9545PW operates on a supply voltage range of 2.3V to 5.5V, making it suitable for a wide range of applications.
• Low Standby Current: This feature aids in power conservation, making the PCA9545PW ideal for power-sensitive systems.

Applications

This I2C-bus switch is versatile and can be used in various applications, including:

• Server systems where multiple same-addressed I2C devices need to be managed.
• Industrial control systems requiring complex I2C communication networks.
• Consumer electronics where multiple I2C sensors or devices are present.

Package Information

The PCA9545PW is offered in a TSSOP-20 (Thin Shrink Small Outline Package) with a body size of 6.5 mm x 4.4 mm. This package is optimized for size-constrained applications and ensures a minimal footprint on the system's PCB.

Quality and Reliability

NXP Semiconductors is committed to delivering high-quality products. The PCA9545PW is designed to meet the rigorous standards of the industry, ensuring reliability and performance for critical applications where multiple I2C devices are in use.