NXP PCA9545AD 4-Channel I2C Switch
The PCA9545AD is a high-performance, 4-channel I2C-bus switch with an interrupt logic from NXP Semiconductors. This integrated circuit is designed to provide multi-channel access for I2C devices that operate at clock frequencies up to 400 kHz. The PCA9545AD allows for the connection of up to four separate I2C-bus slave devices to a single I2C-bus master, effectively expanding the I2C-bus connectivity and enabling communication with multiple I2C devices that may have identical addresses.
Key Features:
- Channel Selection: The device offers four bidirectional translating switches that can be controlled via the I2C-bus, allowing for the selection of any combination of the I2C-bus slave devices.
- Interrupt Function: Each switch has an interrupt input that is aggregated to produce a master interrupt output, ensuring prompt attention by the host when an event occurs on any of the connected slave devices.
- Low Standby Current: The PCA9545AD is optimized for low power consumption, drawing a minimal standby current, making it suitable for power-sensitive applications.
- Compatibility: It is fully compatible with 5V I2C-bus and SMBus protocols, allowing for easy integration into existing systems.
Applications:
The PCA9545AD is ideal for a variety of applications where multiple I2C devices need to be accessed. It is commonly used in:
- Server systems and server motherboards
- Industrial control systems
- Telecommunications equipment
- Consumer electronics
- Medical equipment
- Automotive infotainment systems
Technical Specifications:
- Supply Voltage: 2.3V to 5.5V
- Operating Temperature: -40°C to +85°C
- Packaging: 20-pin TSSOP
- Compliance: RoHS compliant and Lead-Free
With its versatility and ease of use, the PCA9545AD from NXP is a reliable choice for system designers looking to enhance I2C-bus capabilities in their next project.
