Part#: 7406e

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Low Profile PCI Express 4-Port RS-232 Serial Interface

Cable Selection

PC Bracket Selection



The 7406e low profile PCI Express serial interface provides four RS-232 serial ports. For maximum compatibility with a wide range of peripherals, the board supports all standard RS-232 modem control signals. The serial ports utilize a 16C954 UART with 128-byte Tx/Rx FIFOs that enables data rates to 921.6K bps for reliable high-speed communications in data intensive applications. This high-performance UART includes 9-bit framing support and is fully software compatible with legacy 16550 applications. In addition, the board derives a 62.5 MHz clock from the PCI Express link. This ultra-high speed clock is divided by a flexible 8-bit clock prescalar with 1/8 steps to provide support for the widest range of standard and non-standard baud rates.

The Sealevel SeaCOM software driver and utilities make installation and operation easy using Microsoft Windows and Linux operating systems.

The 7406e is a PCI Express X1 board compatible with any low profile PCI Express slot. If you have a standard size PCI Express slot, be sure to select the standard profile bracket. The board includes a 36 inch cable that terminates to four DB25M connectors.

Additional information

Operating Temperature

0°C to 70°C (32°F to 158°F)

Max Data Rate

921.6K bps

Communications Chip



4.70” (L) x 2.54” (H)

Electrical Interface


Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Host Interface(s)

PCI Express

Max Data Distance

50 feet


62.5 MHz

UART Series

950 UART

Board Connector


PC Bracket

Low Profile

# of Ports


RoHS Compliant


Serial Connector(s)


Storage Temperature

-50 – +105C

Cable Connector(s)

DB25M (4)

  • • 16C954 buffered UARTs with 128-byte FIFOs
  • • Oscillator and clock prescalar support wide range of baud rates
  • • Supports 9-bit protocol framing
  • • Each port supports data rates to 921.6K bps
  • • PCI Express X1 compliant
  • • Compatible with all low profile PCI Express slots
  • • All modem control signals implemented
  • • Included 36″ cable terminates to four DB25M connectors (Item# CA199)

Windows Software

Software: SeaCOM - Windows


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