XR21V1414IM48-F

Overview

The XR21V1414IM48-F is a four-channel USB to UART bridge controller from MaxLinear, compliant with the USB 2.0 Full Speed specification at 12 Mb/s. It operates on a single 3.3 V supply (2.97 V to 3.63 V) with 5 V tolerant I/Os and features an internal 48 MHz clock, eliminating external crystals. Each channel includes a 128-byte TX FIFO and a 384-byte RX FIFO for optimized throughput. The device supports fractional baud rate generation, hardware/software flow control, and automatic RS-485 direction control. It is housed in a 48-pin TQFP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates four independent UART channels with large transmit and receive FIFOs to enhance data throughput efficiency.
• Utilizes an internal 48 MHz clock source to enable precise fractional baud rate generation without external oscillators.
• Supports automated half-duplex RS-485 direction control and multi-point mode for simplified industrial network integration.

Applications

• Portable electronic devices requiring compact USB connectivity
• Battery-powered equipment needing low power consumption
• Industrial automation and process control systems
• Cellular data modems and external converter dongles

Procurement Notes

Verify the specific suffix against official MaxLinear documentation to confirm pinout compatibility and electrical characteristics. Ensure the procurement channel provides valid traceability for RoHS compliance. Confirm that the packaging format matches the required production line specifications before finalizing orders.

Selection Notes

Select this component when a design requires four distinct serial ports connected via a single USB interface. The internal clock simplifies PCB layout by removing crystal components. Verify that the host system supports WHQL-certified drivers for Windows or standard drivers for Linux and Mac environments.

Part Context

This part belongs to the XR21V141x family of full-speed USB UART controllers. It serves as a direct upgrade to previous generations by integrating higher capacity FIFOs and an internal clock. The IM48 variant specifically denotes the 48-pin TQFP surface-mount package suitable for dense board layouts.

Replacement Considerations

The XR21V1414IM48TR-F is a tape-and-reel version of the same functional device. Verify if the tray packaging of the IM48-F is strictly required or if the reel variant offers equivalent performance for the assembly process.