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EXAR XR21x14x UART

The Exar XR21x14x Universal Asynchronous Receiver Transmitter with USB 2.0 compliant bus interface is the industry's fastest UART series. The USB interface on the Exar XR21x14x supports 12 Mbps USB data transfer rate, USB suspend, resume, and remote wakeup operations. This Exar UART operates from an internal 48 MHz clock, requires 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), battery-operated devices, and more. Exar also offers 1-, 2-, and 4-channel evaluation boards with RS-232 and RS-485 interfaces for testing the capabilities of these Exar UARTs.

XR21V1410 XR21V1412 XR21V1414 XR21B1411
The Exar XR21V1410 (V1410) is an enhanced Universal Asynchronous Receiver and Transmitter (UART) with a USB interface. The Exar XR21V1412 (V1412) is an enhanced 2-channel Universal Asynchronous Receiver and Transmitter (UART) with a USB interface. The Exar XR21V1414 (V1414) is an enhanced 4-channel USB Universal Asynchronous Receiver and Transmitter (UART). The Exar XR21B1411 (B1411) is an enhanced Universal Asynchronous Receiver and Transmitter (UART) with a USB interface.




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Additional Resources

Exar USB UART Video

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Features and Applications
USB 2.0 Compliant Interface
Supports 12 Mbps USB full-speed data rate
Supports USB suspend, resume and remote wakeup operations
Enhanced Features of each UART:
Data rates up to 12 Mbps
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 Wake-up
Selectable GPIO or Modem I/O
Internal 48 MHz clock
Single 2.97-3.63V power supply

5V tolerant inputs
32-pin QFN package
Virtual COM Port drivers
Windows 2000, XP and Vista
Windows CE 4.2, 5.0, 6.0
Linux
Mac

Ideal for use in:
Portable Appliances
External Converters (Dongles)
Factory Automation and Process Controls
Cellular Data Devices
Battery-Operated Devices
Industrial Applications




  • Exar
  • Semiconductors|IC-Interface