XR21B1411ILTR-E1-F

Overview

The XR21B1411ILTR-E1-F is an enhanced single-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 features a programmable internal clock operating at 6, 12, 24, or 48 MHz, eliminating the need for external crystals. It includes a 128-byte transmit FIFO and a 384-byte receive FIFO to optimize throughput. The component operates from a single 5V power supply within a voltage range of 4.4V to 5.25V and utilizes a 16-pin QFN package.

Feature Summary

• Supports automatic RS-485 half-duplex transceiver direction control to simplify hardware design
• Includes on-board OTP memory for programming Vendor ID, Product ID, and default baud rate settings
• Provides virtual COM port drivers certified for Windows XP through Windows 11 and Linux environments

Applications

• Portable appliances and battery-operated devices
• External converters and dongles
• Cellular data devices
• Factory automation and process controls
• Industrial applications

Procurement Notes

Verify that the specific suffix E1-F corresponds to the tape and reel packaging method as indicated in official ordering information. Confirm the operating temperature range is -40°C to +85°C. Ensure compatibility with standard CDC-ACM drivers or custom driver implementations before finalizing procurement specifications.

Selection Notes

Select this component when a compact USB-to-UART bridge is required without external oscillators. The large FIFO sizes are suitable for applications needing optimized data throughput. Consider the auto RS-485 control feature if interfacing with multidrop networks. Verify that the single 5V supply requirement aligns with the system power architecture.

Part Context

This part belongs to the XR21B1411 series of enhanced full-speed USB UARTs. It serves as a direct replacement for previous generation UARTs requiring external crystals, offering a smaller footprint and integrated clocking. The series is designed to provide industry-standard connectivity with reduced bill-of-materials complexity.

Replacement Considerations

Public confirmed substitute part numbers include XR21B1411IL16TR-F.