1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART 1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART

Startech Canada

  • $75.99

Add a RS-232 serial port to your standard or small form factor computer through a PCI Express expansion slot

  • 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

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 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® 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 lets you add a serial port to virtually any computer (regardless of the case form factor).

This product is a replacement for our PEX1S552LP card.

Backed by a Lifetime warranty and free lifetime technical support.

The Advantage
  • Native single-Chip, single lane PCI Express; 48% less cpu load, and increased performance
  • Pre-configured for low profile/half-height systems but includes a full profile bracket for versatility
  • Easy to install and use with full step-by-step instructions saving time and hassle
Warranty Information
Warranty 2 Years
Bus Type PCI Express
Card Type Low Profile (SP bracket incl.)
Chipset ID ASIX - MCS9922CV-AA
Interface Serial
Port Style Integrated on Card
Ports 1
FIFO 128 Bytes
Max Baud Rate 460.8 Kbps
Serial Protocol RS-232
Connector Type(s) 1 - PCI Express x1 Male
External Ports 1 - DB-9 (9 pin, D-Sub) Male
Internal Ports 1 - LP4 (4 pin, Molex Large Drive Power) Male
Microsoft WHQL Certified Yes
OS Compatibility Windows® DOS, 95, 98SE, 2000, CE 5.0/6.0, Embedded System 2009, POS Ready 2009, XP Embedded, XP, Vista, 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
Mac OS X® 10.4 to 10.10
Linux kernel 2.6.x to 4.11.x LTS Versions only
Humidity 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)
Physical Characteristics
Product Height 0.8 in [20 mm]
Product Length 4.1 in [105 mm]
Product Weight 1.8 oz [51.5 g]
Product Width 3.1 in [80 mm]
Packaging Information
Shipping (Package) Weight 0.4 lb [0.2 kg]
What's in the Box
Included in Package 1 - 1 Port PCI-Express Serial Card
1 - Full Profile Bracket
1 - Driver CD
1 - Instruction Manual

* Product appearance and specifications are subject to change without notice.

150 in stock

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