XR21B1422IL40-F

Overview

The XR21B1422IL40-F is a dual-channel Full-Speed USB to UART bridge integrated circuit manufactured by MaxLinear. It operates within the USB 2.0 standard at a data rate of 12 Mb/s. The device features 512-byte transmit and receive FIFOs for each channel. It supports supply voltages ranging from 3 V to 3.6 V and 4.4 V to 5.25 V, with a typical operating current of 15 mA. The component is housed in a QFN-40 package designed for surface mount technology. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Dual independent UART channels with dedicated 512-byte TX/RX FIFOs per port
• Full-speed USB 2.0 interface supporting 12 Mb/s data transfer rates
• Flexible power supply options accommodating both 3.3 V and 5 V logic levels

Applications

• Multi-port serial communication expansion in embedded systems
• Industrial automation controllers requiring isolated UART connectivity
• Test and measurement equipment needing multiple serial interfaces

Procurement Notes

Verify the specific suffix 'F' against the manufacturer's latest datasheet to confirm packaging and material compliance details. Ensure the QFN-40 thermal pad soldering process aligns with PCB assembly guidelines. Confirm that the selected voltage domain matches the system's 3.3 V or 5 V requirements before integration.

Selection Notes

Select this model when two independent UART bridges are required in a compact form factor. Compare FIFO depths against single-channel alternatives like the XR21B1421 if higher throughput per port is needed. Verify pin compatibility with existing designs if replacing older XR21 series components.

Part Context

This part belongs to the XR21B142x series of USB-to-UART bridge controllers. It shares architectural similarities with the XR21B1421 (single channel) and XR21B1424 (four channels). The IL40 designation indicates the specific QFN-40 package variant optimized for high-density board layouts.

Replacement Considerations

Direct functional substitutes include the XR21B1421IL40-F for single-channel applications and the XR21B1424IV64TR-F for four-channel needs. Pin-compatible replacements within the same family should be verified for electrical parameter alignment.