StarTech.com 1-Port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9

StarTech.com PEX1S953LP

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Manufacturer Part#  PEX1S953LP

UPC Code: 065030881159

Provantage Code:  STRN05M

Condition:  Factory New

  • Product Type: Serial Adapter
  • Country of Origin: Taiwan
  • Limited Warranty: Lifetime
  • Form Factor: Plug-in Card
  • Host Interface: PCI Express x1
  • TAA Compliant: Yes

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StarTech.com PEX1S953LP Specifications

    1-Port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9

At a Glance

    Rear View
    • 1 PORT SERIAL CARD: Serial controller card w/ 16950 UART based on ASIX AX99100, allows 1x DB9 port w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit; Upgraded version of our popular card PEX1S952LP
    • OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total
    • STANDARD PROFILE & LOW PROFILE BRACKET: PCIe serial card comes w/ a low profile bracket pre-installed & 1x full profile bracket is incl for versatile install; Supports Windows XP and up & Linux
    • VERSATILE APPLICATIONS: For low/standard profile desktop/servers w/ uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope
    • STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCI-e RS232 Serial expansion card is backed for life by StarTech.com, incl. free 24/5 North America based multi-lingual tech support


    This RS232 Serial Adapter Card lets you add an RS232 DB9 serial port to your computer through a PCI Express (PCIe) slot. It enables you to interact with serial devices such as card readers, printers, PIN pads, and modems, at speeds of up-to 921.4Kbps.

    Maximum Compatibility

    With broad OS support, including for Windows and Linux, this PCI Express card is easy to integrate into mixed environments. The card comes pre-configured with a low-profile bracket, and includes an optional full-profile bracket, so installation is easy regardless of the case form factor.

    Experience Optimal Technology

    This PCIe to serial adapter supports the following features:

    • Compatible with industry standard 16950 UART
    • Supports max baud rate of up-to 921.4Kbps
    • Provides 5/12V power output on Pin 9 when external power is connected
    • 128-byte depth FIFO per transmitter and receiver
    • Supports 9, 8, 7, 6, 5 data bits
    • Asix AX99100 chipset
    • PCI Express 1.1 compliant

    PEX1S953LP is backed by a StarTech.com lifetime warranty and free lifetime technical support.

    More from the Manufacturer

Package Contents

    • 1-Port PCI Express Serial Card with 16950 UART - Low-Profile
    • 1 x Full-Profile Bracket
    • 1 x User Manual

Additional Product Images


Product Name1-Port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9
Manufacturer Part NumberPEX1S953LP
Product TypeSerial Adapter
Number of Serial Ports (External)1
Environmental ComplianceRestriction of Hazardous Substances (RoHS)

Registration, Evaluation, Authorization and Restriction of Chemicals (REACH)

Waste Electrical and Electronic Equipment Directive (WEEE)

Form FactorPlug-in Card
Host InterfacePCI Express x1
Environmentally FriendlyYes
Card HeightLow-profile
Country of OriginTaiwan
Packaged Quantity1
Platform SupportedPC


Limited WarrantyLifetime
UART Type16950
Supplies/Accessories for StarTech.com PEX1S953LP

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

Mfg Part# MXT100FF

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

Mfg Part# SCNM9FM

Considering a Volume Purchase?
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Purchase a minimum of $3,000 of StarTech Products

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