XR21B1424IV64-F

Overview

The XR21B1424IV64-F is a four-channel full-speed USB to UART bridge integrated circuit manufactured by MaxLinear. It operates under the USB 2.0 standard with a data rate of 12 Mb/s and supports both 3.3 V and 5 V supply voltages, ranging from 3 V to 3.6 V or 4.4 V to 5.25 V respectively. The device features 512-byte transmit and receive FIFOs per channel and draws 15 mA during operation. It is housed in an LQFP-64 surface-mount package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides four independent UART channels for simultaneous serial communication
• Integrates 512-byte TX and RX FIFOs per channel to manage data buffering
• Supports dual voltage domains for flexible system integration

Applications

• Industrial automation systems requiring multiple serial interfaces
• Embedded devices needing USB connectivity for legacy UART peripherals
• Communication equipment utilizing multi-port serial expansion

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for recent Product Change Notices (PCN) regarding manufacturing updates. Ensure the specific suffix matches project requirements as packaging variations may exist.

Selection Notes

Select this model when four distinct UART ports are required within a single USB interface solution. Compare against the XR21V1414 series if higher speed or different pinout configurations are needed. Verify that the LQFP-64 footprint aligns with existing PCB layout constraints and thermal management plans.

Part Context

This component belongs to the XR21B1424 series of enhanced full-speed USB UART bridges. It serves as a bridge between USB host controllers and serial peripheral devices, replacing traditional PCI or ISA UART cards in modern computing architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate the XR21V1414IM48TR-F only if pin compatibility and voltage levels allow for design modification.