XR21B1411IL16-E1-F

Overview

The XR21B1411IL16-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 128-byte transmit FIFO and a 384-byte receive FIFO to optimize throughput. It operates from a single 5V power supply (4.4V to 5.25V) and includes an internal programmable oscillator configurable to 6, 12, 24, or 48 MHz, eliminating the need for external crystals. The component is housed in a 16-pin QFN package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Internal programmable oscillator eliminates requirement for external crystal or oscillator components
• Automatic transceiver direction control simplifies hardware and software for half-duplex RS-485 applications
• On-board OTP allows programming of Vendor ID, Product ID, and default baud rate settings via USBD+ / USBD- pins
• Supports USB suspend, resume, and remote wakeup operations compliant with USB 2.0 standards

Applications

• Portable Appliances
• External Converters (dongles)
• Battery-Operated Devices
• Cellular Data Devices
• Factory Automation and Process Controls

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging method and environmental ratings. Ensure compatibility with required operating voltage ranges and interface standards before integration. Confirm driver support availability for the target operating system environment.

Selection Notes

Select this component when a single-channel USB-to-UART bridge is required with integrated clock generation. Consider the 128-byte TX and 384-byte RX FIFO sizes for throughput requirements. Verify that the 16-pin QFN package fits the PCB layout constraints and that the 5V supply voltage aligns with the system design.

Part Context

This part belongs to the XR21B1411 series of enhanced full-speed USB UARTs. It serves as a successor to previous generations by integrating an internal programmable clock source. The series is designed to replace discrete USB controllers and UARTs in compact designs requiring reliable serial communication over USB.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.