XR21B1421IL24-F

Overview

The XR21B1421IL24-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 (FS) data rates up to 12 Mb/s. The device functions as a USB HID-compliant interface, eliminating the need for external drivers on host systems. It features programmable baud rates and configurable FIFO depths for efficient data buffering. The component is housed in a QFN-24 package and supports operating supply voltages of 3.3 V and 5 V. It is designed for industrial applications with an operational temperature range spanning from -40°C to +85°C.

Feature Summary

• Integrates a full-speed USB controller with a UART bridge for direct serial communication
• Supports Human Interface Device (HID) class compliance for driver-free operation
• Provides flexible power input options compatible with standard 3.3 V and 5 V logic levels

Applications

• Industrial automation systems requiring robust serial connectivity
• Embedded devices needing driverless USB-to-serial interfacing
• IoT gateways and sensors utilizing USB HID protocols

Procurement Notes

Verify the specific suffix 'F' against the manufacturer's official documentation to confirm tape-and-reel packaging status and RoHS compliance details. Ensure that the QFN-24 footprint matches the target PCB design constraints. Confirm lead times directly with authorized distributors as production cycles may vary based on current demand and manufacturing schedules.

Selection Notes

Select this component when a single UART channel with USB HID compatibility is required. Compare against the XR21B1422 series if multiple UART channels are needed. Verify that the QFN-24 package size fits the available board space. Ensure the application environment stays within the specified -40°C to +85°C temperature range for reliable operation.

Part Context

This part belongs to the XR21B1421 family of USB-to-UART bridges from MaxLinear. It serves as a compact solution for converting USB signals to asynchronous serial data. The series is known for its high performance and low power consumption compared to legacy USB UART controllers. It is often used in conjunction with evaluation boards like the XR21B1421IL24-0A-EVB for development purposes.

Replacement Considerations

Check for the XR21B1421IL24 variant without the 'F' suffix if bulk packaging is preferred instead of reel packaging. Consider the XR21B1422 series for designs requiring additional UART channels.