Topologie: Other
Schaltfrequenz (min.): 6.00 kHz
Schaltfrequenz (max.): 48.00 kHz

Erstveröffentlichung am 01.09.2010, Version 1.1.0 vom


The XR21B1411 (B1411) is an enhanced Universal Asynchronous Receiver and Transmitter (UART) with a USB interface. The USB interface is fully compliantto Full Speed USB 2.0 specification that supports 12Mbps USB data transfer rate. The USB interface also supports USB suspend, resume and remote wakeup operations.The B1411 operates from an internal clock that is programmable to 6, 12, 24 or 48 MHz. Therefore, no external crystal / oscillator is required as in previous generation UARTs. With the fractional baud rate generator, any baud rate up to 12 Mbps can be accurately generated using the internal clock.The large 128-byte Tx FIFO and 384-byte Rx FIFO of the B1411 help to optimize the overall data throughput for various applications. The AutomaticTransceiver Direction control feature simplifies both the hardware and software for half-duplex RS-485 applications. If required, the multidrop (9-bit) mode with automatic half-duplex transceiver control feature further simplifies typical multidrop RS-485 applications.The Vendor ID, Product ID, bus-powered mode, selfpowered mode, Remote Wakeup support or Maximum Power Consumption values, as well asdefault baud rate settings can be programmed using the on-board OTP through the USBD+ / USBD- pins.The B1411 operates from a single 5V power supply and is available in a 16-pin QFN package.WHQL certified software drivers for Windows 2000, XP, Vista, 7, and CE, as well as Linux and Mac are supported for the XR21B1411


  • ±15kV HBM ESD on USBD+/USBD-
  • USB 2.0 Compliant, Full-Speed (12 Mbps)
  • Supports USB suspend, resume and remotewakeup operations
  • Unique preprogrammed USB serial number
  • Enhanced UART Features
  • 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 Transceiver Control
  • Half-Duplex mode
  • Selectable GPIO or Modem I/O
  • Internal 48 MHz clock with clock divisorsprogrammable down to 6 MHz
  • Single 5V power supply
  • 5V tolerant inputs
  • 16-pin QFN package
  • Virtual COM Port WHQL certified drivers
  • Windows 2000, XP and Vista, 7
  • Windows CE 4.2, 5.0, 6.0
  • Linux
  • Mac


  Artikel Nr. SPEC Produktserie Pins Gender Typ L1
IR 1
RDC1 max.
fres 1
Qmin. H
VPE Reihen Verpackung Anwendung Interface typ Pins Montageart Arbeitsspannung
(V (AC))
618009211721 PDF WR-DSUB 8.08 mm Male Angled PCB Connector w/o Hex Screw 9 Männlich Angled
744032002 PDF WE-LQ SMT-Induktivität 2.2 0.62 1.8 0.15 50 20
430152043826 PDF WS-TASV SMT Tact Switch 6x6 mm 4.3 260 1000
61300811121 PDF WR-PHD 2.54 mm THT Pin Header 8 Pin Header Gerade 3 Single Beutel
61400416121 PDF WR-COM USB 2.0 Horizontal THT Weiblich Horizontal 1.5 Tray USB 2.0 Type B 4 THT 30
61301211121 PDF WR-PHD 2.54 mm THT Pin Header 12 Pin Header Gerade 3 Single Beutel