4-Port Native PCI Express RS232 Serial Adapter Card with 16550 UART (PEX4S553)

  • List Price: $112.99
  • Sale Price: $60.45
  • Amount Saved: $52.54
  • Availability: Temporarily out of stock. Order now and we'll deliver when available. We'll e-mail you with an estimated delivery date as soon as we have more information. Your credit card will not be charged until we ship the item.


  • Native single-chip, single lane PCI Express chipset delivers true PCIe performance, up to 48% more efficient than bridge chip designs
  • Standard and low profile/half-height brackets included to ensure fitment in any system
  • Four high speed RS232 serial ports, with support for data transfer rates up to 128000bps
  • Built-in 16C450/550 compatible UART
  • Includes half-height/low profile mounting brackets
  • 256-byte deep FIFO per transmitter and receiver
  • Native single-Chip, single lane PCI Express
  • Compliant with PCI Express Base Specification 1.1

Product Description

The PEX4S553 4-Port Native PCI Express RS232 Serial Adapter Card with 16550 UART lets you add 4 RS232 (DB9) serial ports, using a single PCI Express expansion slot. Based on a native single-chip design, this 4-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge-chip serial cards. The RS232 Serial Adapter Card includes 4 half-height/low-profile brackets, allowing the card to be installed into almost any PC case, regardless of form factor. Backed by a Lifetime warranty and free lifetime technical support.

Product Detail

  • Product Dimensions: 5.55 x 6.81 x 1.1 inches; 0.49 pounds
  • Shipping Weight: 0.49 pounds
  • ASIN: B00535BUR4
  • Item model number: PEX4S553
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