XR21B1422IL40TR-F

Overview

The XR21B1422IL40TR-F is a dual-channel Full Speed USB to UART bridge controller manufactured by MaxLinear. It operates under the USB 2.0 standard with a data rate of 12 Mb/s. The device provides independent UART interfaces for two channels, each equipped with 512-byte transmit and receive FIFOs. It supports power supply voltages ranging from 3 V to 3.6 V or 4.4 V to 5.25 V, with a typical operating current of 15 mA. The component functions within an ambient temperature range of -40°C to +85°C and is housed in a QFN-40 surface-mount package.

Feature Summary

• Dual-channel architecture providing independent serial communication paths
• Integrated 512-byte TX/RX FIFOs per channel for efficient data buffering
• Direct replacement compatibility with legacy Exar/MaxLinear UART controllers

Applications

• Industrial automation systems requiring multiple serial ports
• Embedded devices needing USB connectivity for configuration and logging
• Telecommunications equipment utilizing RS-232 or RS-485 interfaces

Procurement Notes

Verify the specific suffix against official MaxLinear documentation to confirm packaging type and tape-and-reel specifications. Ensure the procurement source provides valid RoHS compliance certificates and original manufacturer traceability. Cross-reference the part number with authorized distributor lists to avoid counterfeit components.

Selection Notes

Select this model when dual independent UART bridges are required in a compact form factor. Compare FIFO depths against single-channel alternatives like the XR21B1411 if higher throughput is needed. Verify voltage domain compatibility between the host USB system and the target UART logic levels before integration.

Part Context

This component belongs to the XR21B14xx series of USB-to-UART bridge controllers. It succeeds earlier generations such as the XR21V14xx series, offering improved integration and pin compatibility. The series is widely used in industrial and consumer electronics for serial port expansion via USB connections.

Replacement Considerations

The XR21B1422IL40-F is a tray-packaged variant of the same functional device. Check datasheets to confirm if the TR suffix strictly denotes tape-and-reel packaging without altering electrical characteristics.