EXSYS EX-1333V 2-Port RS-232 Serial & 1-Port Parallel PCI Express x1 Low Profile Multi-I/O Card

Equipped with the Oxford Semiconductor OXPCIe952 chipset, the EXSYS EX-1333V delivers two RS-232 serial ports and one parallel port over a single PCI Express x1 lane, with a 128-byte FIFO buffer per serial port for smooth data handling at up to 230.4 Kbps.

Overview

The EX-1333V is a low-profile multi-I/O card that adds legacy connectivity to modern systems. It provides two DB9 male serial ports and one DB25 female parallel port, supporting EPP/ECP/SPP/BPP parallel modes. The card is powered entirely from the PCIe bus and uses MSI interrupts for efficient operation.

What stands out

• Dual RS-232 serial ports with 128-byte FIFO buffers
• Parallel port supports EPP, ECP, SPP, and BPP modes
• Low-profile form factor with included standard bracket for flexible installation
• Broad OS support: Windows 7/8/10/11 and Linux kernel 2.6.x+

Technical details

• Host interface: PCI Express x1, PCIe revision 1.1
• Serial ports: 2 × RS-232, DB9 male, max data rate 230.4 Kbps
• Parallel port: 1 × DB25 female, max data rate 1.5 Mbps
• Chipset: Oxford Semiconductor OXPCIe952
• Interrupt type: MSI (Message Signaled Interrupts)
• Power source: PCIe bus power
• Form factor: Low profile (standard bracket included)

Our verdict

A reliable way to add legacy serial and parallel connectivity to modern PCIe systems, with low-profile flexibility and broad OS support.