Syba
Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
MCS9922 is a single lane multifunction PCI express to I/O controller. It supports two serial ports and eight GPIO's. MCS9922 also provides an option for peripheral expansion through proprietary Cascade interface. The generic cascade interface allows interconnecting with similar chips like MCS9900 to expand the peripheral ports.The serial ports are compatible with RS232, RS422 & RS485 standards and supports throughput from 50bps to 16Mbps. All the GPIO pins are programmable and can be used as Input or Output. An I C interface is provided to configure MCS9922 device options through an external…
SpecPicks Verdict
SpecPicks classifies Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232… as a solid pick with broad community endorsement in the expansion cards category, based on 57 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. Syba's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Solid 4.3★ customer rating
- ✓ MCS9922 Chipset
- ✓ Backed by Syba's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- MCS9922 Chipset
- Compatible with Industrial Standard 16C550 UART. On Chip 256-byte Depth FIFO in Transmit.
- Transfer data rates up to 250Kbps on each port. Supports hardware and software flow control. Supports 5, 6, 7, 8-bit Serial format
- Fully compliant with PCI-Express base Specification Revision 1. 0a
- Single-lane (x1) PCI-Express with throughput up to 2. 5Gbps
- Form Factor: Low profile
Full Specifications
| Brand | Syba |
|---|---|
| Style | 1 Port DB9 Serial PCI-e 1.0 x1 Card |
| Style Name | 1 Port DB9 Serial PCI-e 1.0 x1 Card |
| Unit Count | 1.0 Count |
| Form Factor | Low profile |
| Model Number | SD-PEX15021 |
| Built-In Media | (1) 1-port Serial PCI-Express Card Low Profile Bracket^(1) Driver CD^(1) User's Manual |
| Item Type Name | Syba Single Port RS-232 DB9 Serial PCI-e 2.0 x1 Expansion Card MCS9922 SD-PEX15021 |
| Mfr Part Number | SD-PEX15021 |
| Operating System | Windows |
| Compatible Devices | Personal Computer |
| Hardware Interface | PCI Express x1 |
| Warranty Description | 3 Year Warranty |
| Global Trade Identification Number | 00172302676488 |
Ready to buy?
Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
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