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Overview
| Topology | Other Topology |
| Switching frequency | 6-48 kHz |
| IC revision | 1.1.0 |
Description
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
Features
- ±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
Typical applications
- Battery-Operated Devices
- Cellular Data Devices
- Portable Appliances
- Industrial applications
- External Converters (dongles)
- Factory Automation and Process Controls
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(Ω) | fres(MHz) | Q(%) | Interface Type | Type | Variant | Gender | Pins | Mount | Working Voltage(V (AC)) | Packaging | L(mm) | Operating Temperature | H(mm) | Operation Force(g) | Electrical Life(Cycles) | Actuator Color | Vaporphase process | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LQ SMT Inductor, 2.2 µH, 0.62 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQ SMT Inductor | Inductance2.2 µH | Rated Current0.62 A | Saturation Current1.8 A | DC Resistance0.15 Ω | Self Resonant Frequency50 MHz | Q-Factor20 % | – | – | – | – | – | MountSMT | – | – | Length3.2 mm | Operating Temperature -40 °C up to +125 °C | Height2 mm | – | – | – | – | ||||
 | WR-PHD Pin Header - Single, –, 3 A | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | Rated Current3 A | – | – | – | – | – | TypeStraight | – | GenderPin Header | Pins8 | MountTHT | Working Voltage250 V (AC) | PackagingBag | Length20.32 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | ||
 | WS-TASV SMT Tact Switch 6x6 mm, –, 0.05 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWS-TASV SMT Tact Switch 6x6 mm | – | Rated Current0.05 A | – | – | – | – | – | – | – | – | – | – | – | PackagingTape and Reel | – | Operating Temperature -40 °C up to +85 °C | Height4.3 mm | Operation Force260 g | Electrical Life200000 Cycles | Actuator ColorWhite | Vaporphase processnot specified | |||
 | WR-PHD Pin Header - Single, –, 3 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | Rated Current3 A | – | – | – | – | – | TypeStraight | – | GenderPin Header | Pins12 | MountTHT | Working Voltage250 V (AC) | PackagingBag | Length30.48 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | |||
 | WR-USB Standard Connectors, –, 1.5 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-USB Standard Connectors | – | Rated Current1.5 A | – | – | – | – | Interface TypeType B | TypeHorizontal | – | GenderReceptacle | Pins4 | MountTHT | Working Voltage30 V (AC) | PackagingTray | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | |||
 | WR-DSUB PCB, –, 3 A | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-DSUB PCB | – | Rated Current3 A | – | – | – | – | – | TypeAngled | Variantwithout Hex Screw | GenderMale | Pins9 | – | Working Voltage125 V (AC) | PackagingTray | Length30.8 mm | Operating Temperature -55 °C up to +105 °C | – | – | – | – | – |