XR21V1414是一种增强型4通道通用异步接收器和发射器( UART)与一个USB接口。 USB接口完全符合全速USB 2.0规格,支持12Mbps的USB数据传输速率。 USB接口还支持USB暂停,恢复及远程唤醒行动。

XR21V1414的运作是透过内部的48MHz时钟,因此不需要外接晶体/振荡器就像上一代个UART 。随着局部波特率发生器,任何波特率可以准确地使用内部的48MHz时钟。

大的128字节发送FIFO ,以及384字节的接收FIFO的XR21V1414有助于优化整体数据吞吐量为各种应用。自动收发方向控制功能,简化了硬件和软件的半双工RS - 485应用。在多点( 9位)模式下自动半双工收发器控制功能进一步简化了典型的多点RS - 485接口的应用。

Windows 2000 , XP , Vista以及Linux和Mac的虚拟COM端口驱动程式都可用于XR21V1414。

Exar's UART Technical Support group.

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  • USB 2.0兼容接口
    • 支持12Mbps的USB全速数据传输率
    • 支持USB暂停,恢复及远程唤醒操作
  • 增强的UART功能
    • 数据传输率高达12 Mbps
    • 局部的波特率发生器
    • 128 byte发送FIFO
    • 384 byte接收FIFO
    • 7,8或9数据位元,1或2个停止位元
    • 自动硬件(RTS/CTS or DTR/DSR)流量控制
    • 自动软件( Xon / Xoff )流量控制
    • 多点模式和自动半双工收发器控制
    • 多点模式和自动发送启用
    • 半双工模式
    • 可选的GPIO或调制解调器的输入/输出
  • 内部48 MHz时钟
  • 单2.97 - 3.63V电源
  • 5V宽的输入
  • 虚拟COM端口驱动程式
    • Windows 2000, XP and Vista
    • Windows CE 4.2, 5.0, 6.0
    • Linux
    • Mac


  • 便携式设备
  • 外部转换器(Dongles)
  • 电池-操作驱动器
  • 小形移动数据驱动器
  • 工厂自动化和过程控制
  • 工业应用

Design Tools

Simulation Models
Evaluation Hardware and Software
Technical Library


Pkg Code Details Quantities Dimensions PDF
QFN16 3x3 OPT1
  • JEDEC Reference: MO-220
  • MSL Pb-Free:
  • MSL SnPb Eutectic:
  • ThetaJA:
  • Bulk Pack Style:
  • Quantity per Bulk Pack:
  • Quantity per Reel:
  • Quantity per Tube:
  • Quantity per Tray:
  • Reel Size (Dia. x Width x Pitch):
  • Tape & Reel Unit Orientation:
  • Dimensions:
  • Length: 3.0
  • Width: 3.0
  • Thickness: 0.9
  • Lead Pitch:

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XR21V1410IL16-F QFN16 3x3 OPT1 -40 85 Active
XR21V1410IL16TR-F QFN16 3x3 OPT1 -40 85 Active
XR21V1410IL-A1-F OBS Suggested:
XR21V1410TR-A1-F OBS Suggested:
XR21V1410-0A-EB Board Active
XR21V1410-0C-EB Board Active
XR21V1410IL-0B-EB Board Active
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
02/14/2017 Qualification of alternate assembly subcon, GREATEK, Taiwan. PCN 17-0102-01 Greatek-1033.pdf
01/31/2017 Addition of qualified 12 inch wafer processing line in Global Foundries, in addition to the currently qualified 8 inch wafer processing. Note: Reliability report will be available February 17, 2017. PCN 16-0731-01-01 12 inch Global Foundries-1033.pdf
01/27/2017 Qualification of alternate assembly subcon, ANST, China. PCN 16-1145-04-01 ANST-1033.pdf
09/02/2015 Metal mask change for yield improvement Process change PCN 14-1145-02-1033.pdf
04/02/2014 Qualified UTAC Thailand for assembly using copper wire or gold wire bonding assembly, in addition to the current qualified gold wire bonding assembly sites, Unisem Batam and UTAC China. Material change and alternate assembly site. PCN_13-0729-02-1033.pdf
10/03/2013 Product Discontinuation Notification Discontinued. PDN_13-1003-01-1033.pdf
03/30/2012 XR21V141x Product Change from Rev B to Rev D Product improvement. PCN_12-0305-01-1033.pdf
08/10/2011 Material change and a new assembly & test supplier (ASE, Kunshan). Business consolidation. PCN_11-0724-01-1033.pdf
01/26/2011 Packing / Shipping: Bulk packing change from tray to canister Packing standardization for 3x3mm QFN. PCN_10-1217-01-1033.pdf
08/04/2010 1. Standardize pin #1 orientation in the reel per Attachment A. 2. Standardize # of units per reel per Attachment A. Refer to PCN for more information. Standardization PCN_10-0716-01-1033.pdf