MaxLinear XR21x14x Universal Async Receiver Transmitters

MaxLinear XR21x14x Universal Asynchronous Receiver Transmitters with USB 2.0 compliant bus interface are part of a fast UART series. The USB interface on the MaxLinear XR21x14x supports a 12Mbps USB data transfer rate, USB suspend, resume, and remote wakeup operations. These MaxLinear UARTs operate from an internal 48MHz clock, require no external crystal/oscillator, and can accurately generate any baud rate using the internal clock. The UART series includes an automatic transceiver direction control feature that simplifies the hardware for RS-485 applications. The XR21x14x UART is ideal for portable appliances, external converters (dongles), and battery-operated devices.

Features

  • USB 2.0 compliant interface
    • Supports 12Mbps USB full-speed data rate
    • Supports USB suspend, resume, and remote wakeup operations
  • Enhanced features of each UART
    • Data rates up to 12Mbps
    • Fractional baud rate generator
    • 128-byte TX FIFO
    • 384 byte RX FIFO
    • 7, 8, or 9 data bits, 1 or 2 stop bits
    • Automatic hardware (RTS/CTS or DTR/DSR) flow control
    • Automatic software (Xon/Xoff) flow control
    • Multidrop mode w/ auto half-duplex transceiver control
    • Multidrop mode w/ auto TX enable
    • Half-duplex mode
    • Sleep mode with remote wakeup
    • Selectable GPIO or modem I/O
  • Internal 48MHz clock
  • Single 2.97-3.63V power supply
  • 5V tolerant inputs
  • 16-pin QFN, 32-pin QFN, or 48-pin TQFP package
  • Virtual COM port drivers
    • Windows 2000, XP, and Vista
    • Windows CE 4.2, 5.0, 6.0
    • Linux
    • Mac

Applications

  • Portable appliances
  • External converters (dongles)
  • Factory automation and process controls
  • Cellular data devices
  • Battery-operated devices
  • Industrial applications

Videos

Published: 2019-05-01 | Updated: 2025-06-19