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Startech Pex2s553 2 Port Pcie Serial Adapter Card W/ 16550 - PS2 - Cables - COMPUTER HARDWARE

Startech Pex2s553 2 Port Pcie Serial Adapter Card W/ 16550


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SKU#: PEX2S553 / ITEM NO: 569467
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    2 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART
    Startech Pex2s553 2 Port Pcie Serial Adapter Card W/ 16550

    Product Overview

    The PEX2S553 PCI Express serial card lets you turn a PCI Express slot into 2 RS232 (DB9) serial ports. Based on a native single chip design (no bridge chip), this 2-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe), and reducing the load applied to the CPU by as much as 48% over conventional serial cards.

    The RS232 Serial Adapter Card (PEX2S553) is compatible with a broad range of operating systems including Windows® 2000/XP/2003/Vista™/Windows 7/Server 2008 R2 (32 and 64 bit), Linux Kernel 2.6.11 and up, and MAC OS 10.4 and above.

    Plus, the serial card includes an optional half-height/low profile bracket that allows the card to be installed in any PCI Express slot, regardless of the size of the computer case.

    This product is a replacement for our PEX2S552 card.

    Backed by a Lifetime warranty and free lifetime technical support.

    Product Specifications

    Warranty Information


    2 Years

    Physical Characteristics



    Product Height

    0.8 in [20 mm]

    Product Length

    4.1 in [105 mm]

    Product Weight

    2.2 oz [63.5 g]

    Product Width

    4.7 in [120 mm]


    Bus Type

    PCI Express

    Card Type

    Standard Profile (LP bracket incl.)

    Chipset ID

    ASIX/MosChip - MCS9922CV-AA



    Port Style

    Integrated on Card





    128 Bytes

    Max Baud Rate

    460.8 Kbps

    Serial Protocol



    Connector Type(s)

    1 - PCI Express x1 Male

    External Ports

    2 - DB-9 (9 pin; D-Sub) Male

    Internal Ports

    1 - LP4 (4 pin; Molex Large Drive Power) Male


    OS Compatibility

    Windows 10 (32/64), 8 / 8.1 (32/64), 7 (32/64), Vista (32/64), XP (32/64), XP Embedded, POS Ready 2009, Embedded System 2009, CE 5.0/6.0, 2000, 98SE, 95, DOS Windows Server 2012, 2008 R2, 2003 Mac OS 10.4 and later (tested up to 10.10) Linux kernel 2.6.x

    Special Notes / Requirements


    Selectable power output on pin 9 of the serial port



    5~85% RH

    Operating Temperature

    -10°C to 80°C (14°F to 176°F)

    Storage Temperature

    -20°C to 100°C (-4°F to 212°F)

    Packaging Information

    Shipping (Package) Weight

    0.4 lb [0.2 kg]

    What's in the Box

    Included in Package

    1 - 2 Port PCI-Express Serial Card


    2 - Low Profile Brackets


    1 - Driver CD


    1 - Instruction Manual

    Brand StarTech
    Manufacturer Warranty
    Limited Product Lifetime Warranty
    Manufacturer Contact Info

    Our customer service staff are standing by to assist you. Should you have questions about this product, please complete the form below and we'll be in touch soonest possible. We aim to answer your enquiries within 24 hours.

    For IMMEDIATE customer service assistance or help with an order please call our Customer Service Team on: 02 9011 2078
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