XR21V1414IM48TR-F

Overview

The XR21V1414IM48TR-F is a four-channel USB to UART bridge controller from MaxLinear, operating as a Full Speed (FS) device compliant with the USB 2.0 specification. It supports data transmission rates up to 12 Mb/s and utilizes an internal 48 MHz clock, eliminating the need for external crystals. The component functions within a single 3.3 V power supply range of 2.97 V to 3.63 V, drawing a typical operating current of 16 mA. It features 5 V tolerant inputs and includes substantial buffer memory consisting of a 128-byte transmit FIFO and a 384-byte receive FIFO per channel. The device is housed in a 48-lead TQFP package and operates reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates four independent UART channels with fractional baud rate generators for precise clocking without external oscillators.
• Includes automatic RS-485 half-duplex direction control and multi-drop mode capabilities to simplify industrial network implementations.
• Provides hardware flow control via RTS/CTS or DTR/DSR signals alongside software Xon/Xoff support for robust data management.
• Features high electrostatic discharge protection ratings on USB data pins and all other interface pins.

Applications

• Portable electronic devices requiring compact serial connectivity solutions.
• Industrial automation systems and process control equipment utilizing RS-485 networks.
• Battery-powered applications benefiting from low power consumption and integrated clocking.
• Cellular data modules and external encryption dongles requiring USB-to-serial bridging.

Procurement Notes

Verify the specific suffix TR-F indicates the reel packaging configuration when sourcing components. Confirm that the order matches the 48-pin TQFP physical footprint required for the target PCB layout. Ensure compatibility with the required operating voltage range of 2.97 V to 3.63 V for the system design. Check for moisture sensitivity level requirements during storage and handling procedures prior to assembly.

Selection Notes

Select this component when four independent serial ports are required within a single USB interface solution. The internal 48 MHz clock simplifies board layout by removing crystal components compared to older generations. Consider the large FIFO sizes if high throughput or burst data transmission is anticipated. Verify that the host system supports the necessary WHQL certified drivers for Windows, Linux, or Mac environments.

Part Context

This part belongs to the XR21V1414 series of USB interface integrated circuits manufactured by MaxLinear. It serves as a direct upgrade to previous generation UART controllers by integrating the clock source internally. The device complements evaluation tools such as the XR21V1414IM-0A-EB for development purposes. It is categorized under USB controllers and bridges within the broader interface IC product line.

Replacement Considerations

The XR21V1414IM48-F is the tray-packaged equivalent of this reel-delivered component. Other family members like the XR21V1410 offer fewer channels, while the XR21B1424 provides larger FIFOs but differs in pin count and package type. Direct pin-compatible replacements within the same package require careful verification of electrical specifications.