The PCA9545AD,118 is a high-quality, 4-channel I²C-bus switch with an interrupt logic, designed and manufactured by NXP Semiconductors. This integrated circuit (IC) allows for multiple I²C devices with the same address to be connected to a single I²C bus, by providing 4 separate bidirectional translating switches that can be controlled via the I²C bus itself. The PCA9545AD,118 is an essential component for complex I²C systems where multiple identical devices need to be used or when the number of devices needed exceeds the available addresses on the I²C bus.

Key Features

• Channel Selection: The PCA9545AD,118 allows for selection between 4 I²C-bus channels using an I²C-bus interface, with the added feature of an interrupt input for each channel.
• Low Standby Current: The switch is optimized for low power consumption and operates in a standby mode when not in use, contributing to overall power efficiency in the system.
• Level Shifting: The device also provides level shifting capabilities between different voltage levels on the upstream and downstream I²C-buses, which is crucial for mixed-voltage systems.
• High Noise Filter: An integrated noise filter on the I²C-bus inputs ensures improved system reliability by preventing spurious data transmission caused by noise.
• Package: The PCA9545AD,118 comes in a 20-pin TSSOP (Thin Shrink Small Outline Package) that is suitable for surface-mount technology (SMT), enabling compact and efficient PCB design.

Applications

The PCA9545AD,118 is versatile and can be used in a range of applications. It is particularly useful in scenarios where multiple I²C devices with the same address need to coexist on the same bus, such as in server management, networking equipment, and multiplexing I²C sensor signals. Its ability to interface with different voltage levels also makes it ideal for use in multi-voltage systems.

Quality and Reliability

NXP Semiconductors is renowned for its commitment to quality and reliability, and the PCA9545AD,118 is no exception. It is designed to meet the rigorous standards required by industrial, automotive, and consumer applications, ensuring performance and stability in a wide range of operating conditions.