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.

FEATURES

• USB 2.0 Compliant, Full-speed (12 Mbps)

■ Supports USB suspend, resume and remote

wakeup operations

• Enhanced Features of each 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 Transceiver Enable

■ Half-Duplex mode

■ Selectable GPIO or Modem I/O

• Internal 48 MHz clock

• Single 2.97-3.63V power supply

• 5V tolerant inputs

• 48-pin TQFP package

• Virtual COM Port WHQL certified drivers

■ Windows 2000, XP Vista and 7

■ Windows CE 4.2, 5.0, 6.0

■ Linux

■ Mac

APPLICATIONS

• Portable Appliances

• External Converters (dongles)

• Battery-Operated Devices

• Cellular Data Devices

• Factory Automation and Process Controls

• Industrial applications