--- product_id: 3800587 title: "Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port" brand: "syba" price: "S$37" currency: SGD in_stock: true category: "Syba" url: https://www.desertcart.sg/products/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie store_origin: SG region: Singapore --- # 2.5Gbps PCIe x1 throughput Supports up to 16Mbps serial data rates 256-byte FIFO buffer for smooth data flow Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port **Brand:** syba **Price:** S$37 **Availability:** ✅ In Stock ## Summary > 🚀 Upgrade your legacy ports with lightning-fast PCIe power! ## Quick Answers - **What is this?** Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port by syba - **How much does it cost?** S$37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie) ## Best For - syba enthusiasts ## Why This Product - Trusted syba brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Data Transfer:** On-chip 256-byte FIFO ensures lag-free, high-speed data handling up to 250Kbps per port, eliminating bottlenecks. - • **Blazing Fast PCIe x1 Speed:** Experience ultra-responsive serial communication with PCI-Express 1.0a, delivering up to 2.5Gbps throughput. - • **Compact Low Profile Design:** Fits perfectly in sleek, space-conscious builds without compromising performance or expandability. - • **Versatile Serial Protocol Support:** Compatible with RS232, RS422, and RS485 standards, supporting data rates from 50bps to 16Mbps for ultimate flexibility. - • **Robust Industrial-Grade Reliability:** Powered by the trusted MCS9922 chipset with hardware/software flow control and a 3-year warranty for peace of mind. ## Overview The Syba Single Port PCI Express x1 RS232 Serial Adapter Card (Model SD-PEX15021) leverages the MCS9922 chipset to deliver high-speed, reliable serial communication. Supporting multiple serial standards (RS232/422/485) and data rates up to 16Mbps, it features a 256-byte FIFO buffer and hardware/software flow control for smooth data transfer. Its low-profile PCIe x1 form factor ensures compatibility with modern PCs, backed by a 3-year warranty and industrial-grade durability. ## Description 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 EEPROM. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003BYRO7E | | Best Sellers Rank | #5 in Serial Port Cards | | Brand | Syba | | Built-In Media | (1) 1-port Serial PCI-Express Card Low Profile Bracket^(1) Driver CD^(1) User's Manual | | Compatible Devices | Personal Computer | | Customer Reviews | 4.3 out of 5 stars 57 Reviews | | Global Trade Identification Number | 00172302676488 | | Hardware Interface | PCI Express x1 | | Item Type Name | Syba Single Port RS-232 DB9 Serial PCI-e 2.0 x1 Expansion Card MCS9922 SD-PEX15021 | | Item Weight | 0.25 Pounds | | Manufacturer | Syba | | Mfr Part Number | SD-PEX15021 | | Model Number | SD-PEX15021 | | Operating System | Windows | | Style | 1 Port DB9 Serial PCI-e 1.0 x1 Card | | Style Name | 1 Port DB9 Serial PCI-e 1.0 x1 Card | | UPC | 168141446214 172302676488 163121142292 810154012923 132017922881 | | Unit Count | 1.0 Count | | Warranty Description | 3 Year Warranty | ## Product Details - **Brand:** Syba - **Compatible Devices:** Personal Computer - **Hardware Interface:** PCI Express x1 - **Item Weight:** 0.25 Pounds - **Style:** 1 Port DB9 Serial PCI-e 1.0 x1 Card ## Images ![Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port - Image 1](https://m.media-amazon.com/images/I/71EBiES1FdL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Frequently Bought Together - Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port - SABRENT USB 2.0 to Serial (9 Pin) DB 9 RS 232 Converter Cable, Prolific Chipset, HEXNUTS, [Windows 11/10/8.1/8/7/VISTA/XP, Mac OS X 10.6 and Above] 2.5 Feet (CB-DB9P) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie](https://www.desertcart.sg/products/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-25*