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Item#: N82E16815158253

StarTech Low Profile Native RS232 PCI Express Serial Card with 16550 UART Model PEX1S553LP

  • PCI Express to Serial Port Card
  • Up to 460 Kbps Data Transfer Rate
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The PEX1S553LP PCI Express Serial Card turns a PCI Express slot into an RS232(DB9) serial connection.

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 CPU 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 system, including Windows 2000/XP/2003/Vista/Windows 7/Server 2008 R2 (32 and 64 bit), Linux Kernel 2.6.11 and up, and ships with a low profile/half-height bracket installed, but includes an optional full profile bracket that allows you to add a serial port to virtually any computer (regardless of form factor).

  • newegg Add a Serial Port to PC Based on native single chip, high performance 16550 design, the StarTech PEX1S553LP card adds one RS232 Serial Port to your PCI Express equipped computer for easy connection to various peripherals.
  • newegg Half/Full Profile Brackets Included This card is pre-configured with low profile/half-height bracket for micro/slim system, and includes a full profile bracket for versatility.

Learn more about the STARTECH PEX1S553LP




PCI Express to Serial Port Card
External Ports
1 x Serial Port
Data Transfer Rate
Up to 460 Kbps
Operating Systems Supported
DOS, Windows 95/ 98SE/ 2000/ XP(32/64bit)/ Server 2003(32/64bit)/ Vista(32/64bit)/ 7(32/64bit)/ Server 2008 R2, Linux, and Mac OS 10.4.x and up
Windows XP Embedded/ POS Ready 2009/ Embedded System 2009 OS/ CE 5.0/ CE 6.0


One high speed RS232 serial port with data transfer rate up to 460.8 Kbps
Ships with half-height/low profile mounting bracket, includes standard bracket
Selectable power output on pin 9 for the serial port
Native single-chip, single lane PCI Express
Single chip design optimizes speed and reliability
Compliant with PCI Express base specifications revision 1.1a
Automated out-of-band flow control using CTS/RTS and DSR/DTR
Automated in-band software flow control using programmable Xon/Xoff in both directions
128-byte deep FIFO per transmitter and receiver

Manufacturer Warranty

1 year limited
1 year limited

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the STARTECH PEX1S553LP

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  • 7/28/2014 7:03:35 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsworks great

Pros: works just fine, used for serial signature capture device

Cons: nothing negative to say today

Other Thoughts: startech and serial port cards always work good for me, I use them in older technology serial signature capture devices.

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Item#: N82E16815158253
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