Product Overview: PCA9517AD - NXP

The PCA9517AD is a robust level-translating I²C-bus repeater designed by NXP Semiconductors. It is a critical component for applications where signal integrity and extended I²C bus communication are essential. The PCA9517AD enables communication between devices that operate at different voltage levels within the same system, making it an indispensable tool for mixed-voltage systems.

Key Features

• Level Shifting: The PCA9517AD provides level shifting between low voltage (down to 0.8V) and higher voltage (up to 5.5V) I²C-bus or SMBus applications, ensuring compatibility across various voltage domains.
• Hot-Swappable: It is hot swappable, allowing a new device to enter or leave the I²C-bus without corrupting the data flow on the bus, which is crucial for servers, telecom, and networking equipment.
• Two-Channel Bidirectional Buffer: The device features a two-channel bidirectional buffer, which allows it to provide capacitive isolation between the upstream and downstream I²C-buses.
• Footprint: The PCA9517AD comes in a small 8-pin SO package, making it suitable for space-constrained applications.
• Bus Capacitance: It supports higher bus capacitance, allowing more devices or longer trace lengths on the I²C-bus.

Applications

The versatility of the PCA9517AD makes it ideal for a variety of applications. It is commonly used in systems where multiple voltage domains exist, such as in multi-voltage systems, battery-powered devices, and within mobile applications. It is also suitable for server motherboards, networking equipment, and telecommunications infrastructure, where reliable data transmission and hot-swapping capabilities are critical.

Technical Specifications

• Supply voltage range: 0.8V to 5.5V
• Operating temperature range: -40°C to +85°C
• Packaging: 8-pin SO
• Compliance with I²C-bus standard and fast mode plus

The PCA9517AD by NXP is an essential component for ensuring reliable and flexible communication in complex electronic systems, offering both level translation and signal integrity across different voltage domains.