StarTech.com 2S1P PCI Express Serial Parallel Combo Card with Breakout Cable

StarTech.com PEX2S1P553B

Click image to enlarge or see more views.

Volume Discounts
Contact us and save even more if you meet these Big Deal qualifications.
Purchase a minimum of $3,000 of StarTech Products

Manufacturer Part#  PEX2S1P553B

UPC Code: 065030842426

Provantage Code:  STRN037

Condition:  Factory New

  • Product Type: Serial/Parallel Combo Adapter
  • Limited Warranty: Lifetime
  • Form Factor: Plug-in Card
  • Host Interface: PCI Express x1
  • Card Height: Low-profile
  • TAA Compliant: Yes

TAA CompliantBig DealsSatisfaction Guaranteed

StorageI/O and Storage ControllersSerial/Parallel I/O Adapters


StarTech.com PEX2S1P553B Specifications

    2S1P PCI Express Serial Parallel Combo Card with Breakout Cable

At a Glance

    Rear View
    • Low profile/half-height design with optional full profile bracket
    • Single-chip architecture, no bridge chip
    • Supports parallel data transfer rates up to 1.5 Mbps
    • Supports serial data transfer rate up to 250 Kbps (per port)
    • Compatible with industrial standard 16C450/16C550 UART
    • Supports (SPP), Enhanced Parallel Port (EPP), Enhanced Capability Port(ECP)
    • PCI Express Base Specification 1.0a compliant
    • On-chip 256-byte depth FIFO in transmit/receive path of each port
    • Single-Lane (x1) PCI-Express host connection


    The PEX2S1P553B 2S1P PCI Express Serial Parallel Combo Card with Breakout Cable combines the functionality of Parallel and Serial cards, adding 2 RS232 serial ports and 1 parallel port through a single PCI Express (PCIe) slot.

    Suitable for almost any computer, the card offers a low profile/half-height design and includes an optional full-height bracket. The included break-out cable uses a single connector on the card to deliver 3 ports, avoiding crowded connections that can occur with fixed/static ports. Compatible with a broad range of operating systems including DOS, Windows® 7/Server 2008 R2/Vista/XP/Server 2003/2000/98SE (32/64 bit), Linux and Mac OS X.

    The card also features a native single-chip design that provides improved speed and reliability while reducing the CPU load by as much as 48% over conventional (bridge chip) cards.

    This product is a replacement for our PEX2S1P552B card.

    Backed by a StarTech.com Lifetime warranty and free lifetime technical support.

    More from the Manufacturer

Environmental Certification




Package Contents

    • 2S1P PCI Express Serial Parallel Combo Card with Breakout Cable
    • 1 x Full Profile Bracket
    • 1 x Driver CD
    • 1 x Instruction Manual

Additional Product Images


Product Name2S1P PCI Express Serial Parallel Combo Card with Breakout Cable
Manufacturer Part NumberPEX2S1P553B
Product TypeSerial/Parallel Combo Adapter
Number of Serial Ports (External)2
Number of Parallel Ports (External)1
TAA CompliantYes
Form FactorPlug-in Card
Host InterfacePCI Express x1
Environmentally FriendlyYes
Card HeightLow-profile
Country of OriginChina
Packaged Quantity1
Parallel Port ModesSPP



Platform SupportedPC


Limited WarrantyLifetime
UART Type16C450


Data Transfer Rate250kB/s Serial Port

1.5MB/s Parallel Port

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Supplies/Accessories for StarTech.com PEX2S1P553B

StarTech.com 25ft DB9 RS232 Serial Null Modem Cable F/F

Mfg Part# SCNM9FF25

StarTech.com 6 ft Straight Through Serial Cable - DB9 M/F

Mfg Part# MXT100

StarTech.com 10 ft DB9 RS232 Serial Null Modem Cable F/M

Mfg Part# SCNM9FM

Considering a Volume Purchase?
You may be able to save even more on your order if you meet the following StarTech.com BIG DEAL qualifications:

Purchase a minimum of $3,000 of StarTech Products

Shop with confidence! Provantage is an authorized StarTech.com dealer.

Visit the Manufacturer
Learn more by visiting the manufacturer's website.

© Copyright 1984-2022 Provantage
StarTech.com PEX2S1P553B