XR21V1414IM48-F
Overview
The XR21V1414IM48-F is a high-performance 4-channel USB 2.0 to UART bridge designed for applications requiring multiple serial ports from a single USB host. It features an integrated fractional baud rate generator and a 384-byte TX FIFO paired with a 128-byte RX FIFO per channel to optimize data throughput. The device operates from a 2.97V to 3.63V supply and includes specialized modes for RS-485 half-duplex control and multidrop networking.
Why Choose This Part
The quad-channel architecture significantly reduces BOM complexity and board space compared to using four discrete bridge ICs. It offers 5V tolerant inputs and a fractional baud rate generator that allows for non-standard speeds without external crystals. The built-in hardware support for RS-485 half-duplex direction control simplifies firmware overhead in industrial networking environments.
Applications
Key Specifications
Getting Started
To evaluate this part, designers typically use the XR21V1414 evaluation board alongside MaxLinear supplied VCP drivers for Windows, Linux, and macOS. Ensure the USB D+ and D- lines are routed as a 90-ohm differential pair and that the 48-TQFP package has adequate decoupling on the VDD pins. MaxLinear provides a configuration utility to customize USB descriptors and GPIO functions without modifying firmware.
