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StarTech.com 2 Port PCIe Serial Adapter Card with 16550 - Half-height/Low-profile Plug-in Card - 16550 UART - PCI Express x1 - PC, Mac, Linux - 2 x Number of Serial Ports External - 1

Item Code: STCPEX2S553

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 and Linux Kernel 2.6.11 to 4.11.x, 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 StarTech.com 2-year warranty and free lifetime technical support. More from the Manufacturer

More from the Manufacturer

Category Networking & Wi-Fi Accessories

Manufacturer StarTech.com

Two high speed RS232 serial ports with support for data transfer rates up to 460.8 Kbps
Compliant with PCI Express base specifications revision 1.0a
Includes half-height/low profile mounting bracket
Selectable power output on pin 9 for the serial port
128-byte deep FIFO per transmitter and receiver

Manufacturer-Brochure
User-Manual

Comparison Data

	Date of last check: 11/02/2025	$85.98

Description

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 and Linux Kernel 2.6.11 to 4.11.x, 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 StarTech.com 2-year warranty and free lifetime technical support. More from the Manufacturer

More from the Manufacturer

Specifications

Lead Time

Ships in 6-10 Bus Days

UNSPSC Code

43201559

Weight

0.35lb

Height

1.5in

Width

5.8in

Length

8.4in

Catalog Page Number

NEW

Brand

StarTech.com

Brand Name

StarTech.com

Card Height

Half-height/Low-profile

Category

Networking & Wi-Fi Accessories

Country of Origin

Taiwan

Data Transfer Rate

460.8kB/s

End of Life Manual Availability

Yes

Environmental Certification

EU RoHS

Environmental Compliance

Restriction of Hazardous Substances (RoHS) 2

Environmentally Friendly

Yes

Form Factor

Plug-in Card

Height

0.8"

Host Interface

PCI Express x1

Length

4.1"

Limited Warranty

2 Year

Manufacturer

StarTech.com

Manufacturer Part Number

PEX2S553

Manufacturer Website Address

http://www.startech.com

Number of Serial Ports (External)

2

Package Contents

2 Port PCIe Serial Adapter Card with 16550
Low Profile Brackets
Driver CD
Instruction Manual

Packaged Quantity

1

Platform Supported

PC

Product Model

PEX2S553

Product Name

2 Port PCIe Serial Adapter Card with 16550

Product Type

Serial Adapter

REACH free of SVHC

Yes

UART Type

16550

Weight (approximate)

2.20 oz

Width

4.7"

Description

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 and Linux Kernel 2.6.11 to 4.11.x, 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 StarTech.com 2-year warranty and free lifetime technical support. More from the Manufacturer

More from the Manufacturer

Specifications

Lead Time

Ships in 6-10 Bus Days

UNSPSC Code

43201559

Weight

0.35lb

Height

1.5in

Width

5.8in

Length

8.4in

Catalog Page Number

NEW

Brand

StarTech.com

Brand Name

StarTech.com

Card Height

Half-height/Low-profile

Category

Networking & Wi-Fi Accessories

Country of Origin

Taiwan

Data Transfer Rate

460.8kB/s

End of Life Manual Availability

Yes

Environmental Certification

EU RoHS

Environmental Compliance

Restriction of Hazardous Substances (RoHS) 2

Environmentally Friendly

Yes

Form Factor

Plug-in Card

Height

0.8"

Host Interface

PCI Express x1

Length

4.1"

Limited Warranty

2 Year

Manufacturer

StarTech.com

Manufacturer Part Number

PEX2S553

Manufacturer Website Address

http://www.startech.com

Number of Serial Ports (External)

2

Package Contents

2 Port PCIe Serial Adapter Card with 16550
Low Profile Brackets
Driver CD
Instruction Manual

Packaged Quantity

1

Platform Supported

PC

Product Model

PEX2S553

Product Name

2 Port PCIe Serial Adapter Card with 16550

Product Type

Serial Adapter

REACH free of SVHC

Yes

UART Type

16550

Weight (approximate)

2.20 oz

Width

4.7"

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