STARTECH 

PEX2S553LP StarTech.com 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART

Mfg Part Number:  PEX2S553LP  
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Price: $50.38
Quantity:
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Last Updated: Jul 15, 2025
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The PEX2S553LP low profile/half-height PCI Express Serial Card turns a PCI Express slot into two RS232 (DB9) serial connections.

The card is constructed using a native single chip design that lets you 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 PCI Express RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows®, and Linux Kernel 2.6.11 to 4.11.x, and ships with a low profile/half-height bracket installed but includes an optional full profile bracket that lets you add 2 serial ports to virtually any computer (regardless of the case form factor).

This product is a replacement for our PEX2S552LP card.

Backed by a StarTech.com 2-year warranty and free lifetime technical support.

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Main Specification
General Information
Manufacturer StarTech.com
Manufacturer Part Number PEX2S553LP
Manufacturer Website Address http://www.startech.com
Brand Name StarTech.com
Product Name 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART
Packaged Quantity 1
Product Type Serial Adapter
Technical Information
Host Interface PCI Express x1
Data Transfer Rate 460kB/s
UART Type 16550
Platform Supported Linux
Platform Supported PC
Platform Supported Mac
Interfaces/Ports
Number of Serial Ports (External) 2
Physical Characteristics
Form Factor Plug-in Card
Card Height Dual-profile
Height 0.8"
Width 3.1"
Length 4.1"
Weight (Approximate) 2.20 oz
Miscellaneous
Package Contents
  • 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART
  • DB9 Ribbon Cable
  • Full Profile Bracket
  • Low profile Bracket
  • Driver CD
  • Instruction Manual
Additional Information
  • Native single-Chip, single lane PCI Express; 48% less cpu load, and increased performance.
  • Pre-configured with half-height mounting bracket for low profile systems, but includes a full profile bracket for versatility.
  • Easy to install and use with full step-by-step instructions saves time and hassle.
Environmentally Friendly Yes
Country of Origin Taiwan
TAA Compliant Yes
Warranty
Limited Warranty 2 Year
product information
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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