XR21B1421IL24TR-F

Overview

The XR21B1421IL24TR-F is a single-channel, full-speed USB to UART bridge integrated circuit manufactured by MaxLinear. It operates within the XR21B1421 series and supports USB 2.0 Full Speed data rates of 12 Mb/s. The device functions as a bridge between Universal Serial Bus interfaces and asynchronous serial communication ports. It is housed in a QFN-24 surface-mount package. The component supports operating supply voltages of 3.3 V and 5 V. It is designed for industrial temperature ranges, functioning from -40°C to +85°C. The part number suffix TR-F indicates it is supplied in a tape and reel packaging format.

Feature Summary

• Provides hardware flow control management via RTS/CTS signals
• Supports automatic baud rate detection for connected devices
• Integrates internal FIFO buffers to manage data throughput

Applications

• Industrial automation systems requiring serial connectivity
• Embedded IoT devices utilizing USB host or peripheral modes
• Medical equipment with legacy serial interface requirements

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and reel specifications. Ensure compatibility with the target system's voltage levels and thermal environment before finalizing procurement orders.

Selection Notes

Select this component when a single UART channel is required alongside USB connectivity. Compare against the XR21B1422 series if dual-channel support is necessary. Verify that the QFN-24 footprint aligns with the printed circuit board layout constraints.

Part Context

This part belongs to the XR21B142x family of USB-to-UART bridges. It serves as a direct replacement for legacy RS-232 or RS-485 interfaces in modern USB-enabled designs. The series is commonly used in applications needing reliable serial data transmission over USB connections.

Replacement Considerations

The XR21B1421IL24-F is the non-tape-and-reel tray equivalent. For multi-channel needs, consider the XR21B1422 series.