4 Channel UART IC UART USB QUAD 48TQF XR21V1414IM48TR-F

Product Specification

Enhanced 4-channel full-speed USB UART FIFO USB QUAD 48TQFP IC XR21V1414IM48TR-F

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

Packaging and transportation instructions

- According to the standard export packaging.

Customers can choose from cartons, wooden cases and wooden pallets according to their own requirements.

Q&A

1. How to obtain the price?

We usually quote within 24 hours after receiving your inquiry (except weekends and holidays). If you are in urgent need of a price, please send us an email or contact us in any other way so that we can provide you with a quotation.

2. What is your delivery time?

This depends on the quantity of the order and the season in which you place the order. Usually, we can ship the goods within 7 to 15 days (for small batches), and for large batches, it takes about 30 days.

3. What are your payment terms?

Factory price, 30% deposit, 70%T/T payment before shipment.

4. What is the mode of transportation?

It can be transported by sea, air or express delivery (EMS, UPS, DHL, TNT, FEDEX, etc.). Please confirm with us before placing an order.

5. How do you help our business establish a long-term and good relationship?

We maintain good quality and competitive prices to ensure that our customers benefit.

2. We respect every customer as our friend. We do business with them sincerely and make friends with them, no matter where they come from.