XR21V1412IL32TR-F

Overview

The XR21V1412IL32TR-F is a dual-channel Universal Asynchronous Receiver and Transmitter (UART) with a USB interface, manufactured by MaxLinear. It complies with the Full Speed USB 2.0 specification, supporting data transfer rates up to 12 Mbps. The device integrates an internal 48 MHz clock, eliminating the need for external crystals. Each channel features a 128-byte transmit FIFO and a 384-byte receive FIFO. It operates on a single power supply ranging from 2.97 V to 3.63 V and includes 5 V tolerant inputs. The component is housed in a 32-pin QFN package.

Feature Summary

• Integrates an internal 48 MHz clock source to remove dependency on external oscillators
• Supports automatic transceiver direction control for simplified half-duplex RS-485 implementations
• Provides fractional baud rate generation capabilities using the internal clock

Applications

• Half-duplex RS-485 multidrop communication systems
• USB-to-UART bridge interfaces requiring high throughput
• Embedded systems needing hardware flow control via RTS/CTS or DTR/DSR

Procurement Notes

Verify the specific suffix TR-F indicates tape and reel packaging when sourcing components. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the 32-pin QFN footprint matches the target PCB layout constraints. Validate that the 2.97 V to 3.63 V operating voltage range aligns with the system power design.

Selection Notes

Select this component for designs requiring two independent UART channels over a single USB connection. The internal 48 MHz clock simplifies bill of materials by removing crystal requirements. Consider the 384-byte RX FIFO size for applications demanding optimized data throughput. Verify compatibility with required software drivers for Windows, Linux, or Mac environments.

Part Context

This part belongs to the XR21V141x family of full-speed USB UART controllers. It serves as an enhanced successor to previous generations by integrating the clock internally. The dual-channel architecture distinguishes it from single-channel variants like the XR21V1410. It is designed for applications replacing legacy UART solutions with modern USB connectivity.

Replacement Considerations

The XR21V1412IM48TR-F offers identical functionality but utilizes a TQFP-48 package instead of QFN-32. Designers must evaluate pinout compatibility and physical footprint differences before substituting packages within the same functional family.