PC/104 4- or 8-port RS-232/422/485 serial

  • Description
  • Specifications
  • Ordering Guide

An ideal serial card choice for your embedded applications, XT/104 is available with 4 or 8 high speed asynchronous RS-232 or RS-422/485 ports, cabling options, and support for various operating systems. Quad UARTs provide each port with large data buffering capabilities, and each port can be configured for electrical interface, baud rate, parity, data and stop bits independently. The XT/104 is the perfect combination of flexibility, high performance and cost-effectiveness.

Number of serial ports XTG490021 – 4-port
XTG890021 – 8-port
UART Type 16C654 quad UARTs c/w 64 byte TxD/RxD FIFO buffers
Protocol RS-232, RS-422, RS-485 (jumper selected)
Control Signals RS-232: DTR, DSR, RTS, CTS, RI, TxD, RxD, DCD
RS-422/485: TxD±. RxD±, CTS±, RTS±
Maximum baud rate RS-232: 50 ~ 230.4 Kbps
RS-422/485: 50 ~ 460.8Kbps
I/O Addresses Eight pre-defined sets of I/O addresses (jumper selectable)
Interrupts 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15 (jumper selectable)
Bus PC/104
Dimensions 90 x 96 mm
Power supply +5VDC ±5% @ 100mA max.
Operating Temperature -40 to +85°C


Model Description
XTG890021 PC/104 8-port RS-232/422/485 with DB-9 cables (XT/104-8)
XTG490021 PC/104 4-port RS-232/422/485 with DB-9 cables (XT/104-4)


Note: 4 - or 8-port RS-232 only versions also available