StarTech.com PEX1S553LP interface cards/adapter PEX1S553LP

Name: PCIe RS232 1-port Serial Adapter PEX1S553LP
Brand: StarTech
SKU: 298299
Price: 65.49 EUR
Availability: InStock

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PCIe RS232 1-port Serial Adapter Card StarTech PEX1S553LP — 16550 UART, DB9, Low Profile, PCIe

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Short description

StarTech PEX1S553LP is a 1-port PCI Express RS232 serial adapter card with a DB9 output and 16550 UART. Designed for PCIe host systems, it features ASIX MCS9922CV-AA chipset, up to 460.8 Kbit/s baud rate, 128-byte FIFO and low-profile form factor. Suitable for adding legacy serial connectivity to Windows, Linux and macOS systems in industrial, POS and embedded applications.

Available for order: 1 pcs.

Warranty: 2 Years

SKU: 298299

Manufacturer: StarTech

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Cost

1.79 €

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

12.08.2026 {{selectedOffer.officeDeliveryString}}

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From 4.99 € (Weight: 1.18 kg)

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Product information

Description

The StarTech PEX1S553LP PCIe RS232 1-port Serial Adapter Card provides a single DB9 serial port for systems with an available PCI Express slot. Built with an ASIX MCS9922CV-AA chipset and a 16550 UART, the card supports baud rates up to 460.8 Kbit/s and includes a 128-byte FIFO buffer. Its low-profile form factor and included full-height bracket make it suitable for both standard and small form factor computers. The adapter is designed to add legacy RS-232 connectivity for industrial devices, point-of-sale systems, embedded hardware and other equipment that require a single serial interface.

Advantages

The adapter uses a native single-chip PCIe design to maximize throughput while reducing CPU load compared with conventional bridge-chip serial cards. Compatibility across multiple operating systems, including Windows and a wide range of Linux kernels, ensures easy integration into existing environments. The card ships with a low-profile bracket and an optional full-height bracket, allowing installation in different case types without additional parts. A compact, low-weight printed circuit board and a DB9 output deliver a reliable, space-efficient serial solution.

Suitable for

Adding an RS-232 DB9 serial port to desktop and small form factor PCs
Connecting industrial controllers, sensors and legacy automation equipment
Point-of-sale (POS) systems and receipt printers that require serial communication
Embedded systems and development platforms needing a standard serial interface

Key specifications

Host interface: PCIe (PCI Express)
Output interface: RS-232 serial (DB9)
UART type: 16550 compatible
Chipset: ASIX MCS9922CV-AA
Maximum baud rate: up to 460.8 Kbit/s
FIFO buffer: 128-byte
Form factor: low profile / half-height with optional full-height bracket
Product colour: green (PCB)
Weight: 0.044 kg

How to use

Power down the computer and unplug it from the mains. Remove the case cover and locate an available PCI Express slot. If required, replace the installed low-profile bracket with the included full-height bracket to match your computer case. Insert the card into the PCIe slot and secure the bracket to the chassis. Reassemble the computer, reconnect power and boot the operating system. Install drivers if the OS does not automatically recognise the device; drivers are available for supported Windows versions and for Linux kernels in the stated range. Once installed, connect RS-232 devices to the DB9 port using a standard serial cable and configure serial port parameters (baud rate, parity, data bits, stop bits) as required by the attached equipment.

Usage recommendations

For stable communication, match the adapter baud rate and serial parameters exactly with the connected device and use shielded serial cables where possible. When installing in compact systems, ensure adequate airflow around the PCIe slot to maintain reliable operation. Reference the operating system compatibility list before deployment and keep drivers up to date for best performance.

Specifications

Internal: The product is built in.: Yes
Host interface: Interface that enables a host controller to communicate with a driver.: PCIe
Output interface: The socket (port) where the output connectors are connected.: Serial

All features

Weight & dimensions

Package weight: Weight of the packaged product.: 130 g
Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.: 0.044 kg
Height: The measurement of the product from head to foot or from base to top.: 20 mm
Depth: The distance from the front to the back of something.: 105 mm
Width: The measurement or extent of something from side to side.: 80 mm

Operational conditions

Operating relative humidity (H-H):: 5 - 85
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.: -20 - 100
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.: -10 - 80

System requirements

Compatible operating systems: List of desktop operating systems tested as compatible with this product.: Linux, Mac OS 10.4.x
Server operating systems supported:: Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server 2003
Linux operating systems supported: 8 RT. Linux (9.4, 9.5), Red Hat Enterprise Linux 5.0 (supported with a pre-built package); SUSE Linux (10.3, 11.0, 11, 11.1, 11.2), Fedora (9, 9.0, 10, 10.0, 11.0, 11, 12, 12.0), Ubuntu (8.04, 8.04.1, 8.04.2, 8.10, 9.04, 9.10, 10.04), Debian (5.0, 5.0.1, 5.0.2, 5.0.3): Yes
Mac operating systems supported: Mac operating systems e.g. OS X can be used with the device.: Mac OS X 10.8 Mountain Lion, Mac OS X 10.10 Yosemite, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.9 Mavericks
Windows operating systems supported: Windows vesions wich can be used with the device.: Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows 8.1, Windows 8.1 Enterprise, Windows 8.1 Enterprise x64, Windows 8.1 Pro, Windows 8.1 Pro x64, Windows 8.1 x64, Windows 95, Windows 98SE, Windows ME, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64, Windows 8 Enterprise x64, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 Pro, Windows 10 Pro x64, Windows 11, Windows 11 x64, Windows 2000, Windows 2000 Professional, Windows 7 Enterprise, Windows 7 Home Basic, Windows 7 Enterprise x64, Windows 8 Enterprise, Windows 8, Windows 7 Ultimate x64, Windows 7 Ultimate, Windows 7 Starter x64, Windows 7 Starter, Windows 7 Professional x64, Windows 7 Professional, Windows 7 Home Premium x64, Windows 7 Home Premium, Windows 7 Home Basic x64

Other features

Other operating systems supported:: Windows XP Embedded, DOS
Drivers included:: Yes
Manual:: Yes

Logistics data

Harmonized System (HS) code:: 84733020
Products per master (outer) case:: 75 pc(s)
Master (outer) case height:: 315 mm
Master (outer) case length:: 692 mm
Master (outer) case width:: 365 mm

Packaging data

Package height: The distance from the top to the bottom of the packaging.: 32 mm
Package depth: The distance from the front to the back of the packaging.: 174 mm
Package width: The distance from one side of the packaging to the other.: 143 mm

Technical details

Compliance certificates: Indicates which regulatory, safety, and environmental standards the product complies with, as verified by recognized authorities or certification bodies.: CE, RoHS

Features

FIFO (First In, First Out):: 128
Baud rate:: 460.8 Kbit/s

Design

Product colour: The colour e.g. red, blue, green, black, white.: Green
Internal: The product is built in.: Yes

Ports & interfaces

Peripheral (Molex) power connectors (4-pin): White 4-pinned connector used to connect a peripheral to the power supply.: 1
Serial interface type:: RS-232
Serial ports quantity: The number of serial ports in a computer or peripheral. A serial port is a serial communication physical interface through which information transfers in or out one bit at a time. The term "serial port" usually identifies hardware more or less compliant to the RS-232 standard, intended to interface with a modem or with a similar communication device. In modern computers and peripherals, serial ports have largely been replaced by USBs and other interfaces.: 1
Host interface: Interface that enables a host controller to communicate with a driver.: PCIe
Output interface: The socket (port) where the output connectors are connected.: Serial

Performance

Chipset: Set of electronic components in an integrated circuit that manages the data flow between the processor, memory and peripherals. It is usually found in the motherboard of a computer. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining system performance.: ASIX - MCS9922CV-AA

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Instructions

mmo_5930740_1655393271_8151_4670.pdf

startech-PEX1S553LP-298299.pdf

Description

Instructions

mmo_5930740_1655393271_8151_4670.pdf

startech-PEX1S553LP-298299.pdf

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Customer questions

FAQ

How much does the StarTech.com PEX1S553LP interface cards/adapter PEX1S553LP cost, and is it available for purchase?

The price is 65.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 12.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All StarTech products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized StarTech service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: internal, host interface, output interface, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for StarTech.com PEX1S553LP interface cards/adapter PEX1S553LP?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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PCIe RS232 1-port Serial Adapter Card StarTech PEX1S553LP — 16550 UART, DB9, Low Profile, PCIe

Short description

Product information

Description

Advantages

Suitable for

Key specifications

How to use

Usage recommendations

Specifications

Weight & dimensions

Operational conditions

System requirements

Other features

Logistics data

Packaging data

Technical details

Features

Design

Ports & interfaces

Performance

Instructions

Description

Instructions

Similar products

Product comparison

Customer reviews

Customer questions

How much does the StarTech.com PEX1S553LP interface cards/adapter PEX1S553LP cost, and is it available for purchase?

If I order this product today, when will I receive my order?

What payment options are available?

Can this product be purchased for a company (with VAT)?

What is the warranty period?

Can the product be returned after purchase?

Where should I contact for warranty service?

How can I tell if this product suits my needs?

Where can I download the instructions for StarTech.com PEX1S553LP interface cards/adapter PEX1S553LP?