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XR21V1414 fiches techniques PDF

Exar Corporation - 4-Ch Full-Speed USB UART

Numéro de référence XR21V1414
Description 4-Ch Full-Speed USB UART
Fabricant Exar Corporation 
Logo Exar Corporation 





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XR21V1414 fiche technique
XR21V1414
4-CH FULL-SPEED USB UART
DECEMBER 2013
REV. 1.3.0
GENERAL DESCRIPTION
The XR21V1414 (V1414) is an enhanced 4-channel
USB Universal Asynchronous Receiver and
Transmitter (UART). The USB interface is fully
compliant to Full Speed USB 2.0 specification that
supports 12 Mbps USB data transfer rate. The USB
interface also supports USB suspend, resume and
remote wakeup operations.
The V1414 operates from an internal 48MHz clock
therefore no external crystal/oscillator is required like
previous generation UARTs. With the fractional baud
rate generator, any baud rate can accurately be
generated using the internal 48MHz clock.
The large 128-byte TX FIFO and 384-byte RX FIFO
of the V1414 helps to optimize the overall data
throughput for various applications. If required, the
multidrop mode and automatic RS-485 half-duplex
direction control feature further simplifies typical
multidrop RS-485 applications.
The V1414 operates from a single 2.97 to 3.63 volt
power supply and has 5V tolerant inputs. The V1414
is available in a 48-pin TQFP package.
WHQL certified software drivers for Windows 2000,
XP, Vista, 7, 8, and CE, as well as Linux and Mac are
supported for the XR21V1414.
APPLICATIONS
Portable Appliances
External Converters (dongles)
Battery-Operated Devices
Cellular Data Devices
Factory Automation and Process Controls
Industrial applications
FEATURES
USB 2.0 Compliant, Full-speed (12 Mbps)
Supports USB suspend, resume and remote
wakeup operations
± 5 kV HBM ESD protection on USB data pins
± 2 kV HBM ESD protection on all other pins
Enhanced Features of each UART
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
Odd, even, mark, space, or no parity
Automatic Hardware (RTS/CTS or DTR/DSR)
Flow Control
Automatic Software (Xon/Xoff) Flow Control
Multidrop mode
Auto RS-485 Half-Duplex Control
Half-Duplex mode
Selectable GPIO or Modem I/O
Internal 48 MHz clock
Single 3.3V power supply
5V tolerant inputs
48-pin TQFP package
Virtual COM Port WHQL certified drivers
Windows 2000, XP Vista, Win7 and Win8
Windows CE 4.2, 5.0, 6.0, 7.0
Linux
Mac
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com

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