The AX78140LF is a USB 2.0 to Quad UART Bridge Controller manufactured by ASIX Electronics Corporation. This chip provides a simple and efficient way to add four independent UART serial ports to a system through a USB interface. It is commonly used in applications requiring multiple serial communication channels, such as point-of-sale systems, industrial automation, and embedded systems.

Applications

• Point-of-Sale (POS) systems
• Industrial automation equipment
• Embedded systems
• Serial port expansion
• Data acquisition systems

Features

• USB 2.0 compliant
• Quad UART interface
• Supports data rates up to 12 Mbps
• Built-in 128-byte FIFO for each UART
• Supports RS-232, RS-485, and RS-422 serial interfaces
• Automatic hardware and software flow control

Benefits

• Easy USB connectivity for serial devices
• Four independent serial ports from a single USB port
• High data transfer rates
• Reduced system complexity
• Wide compatibility with various serial devices
• Improved data reliability with FIFO and flow control

Technical Specifications:

• USB Standard: USB 2.0
• Number of UARTs: 4
• Data Rate: Up to 12 Mbps
• FIFO Size: 128 bytes per UART
• Serial Interface: RS-232, RS-485, RS-422
• Operating Voltage: 3.3V
• Operating Temperature: -40°C to +85°C
• Package: LQFP-64

The ASIX AX78140LF provides a reliable and cost-effective solution for adding multiple serial ports to a system via USB. Its wide range of features and compatibility makes it suitable for various industrial and embedded applications.