Product Type | USB to Serial RS232 Adapter Cable |
Manufacturer | StarTech |
Part Number | ICUSB2321X |
Form Factor | External Cable Adapter |
Chipset | TI USB3410 |
Color | Black |
Cable Length | 12 in (30 cm) |
Weight | 72 g (2.5 oz) |
Power Source | USB-powered |
Supported Operating Systems | Windows XP to Windows 10 (REV2 only), not macOS, Linux, ChromeOS |
COM Port Retention | Yes |
StarTech 1 Port USB 2.0 to Serial RS232 Adapter Cable, 12in, ICUSB2321X





Key Benefits

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- Ensures legacy device connectivity with modern USB ports using RS232 protocol.
- Ideal for secure government or enterprise use thanks to TAA compliance and Taiwan-based manufacturing.
- Simplifies deployment with plug-and-play functionality and support for COM retention in Windows.
Product Overview
USB to serial RS232 (DB9) adapter for Windows; Windows 8.1 & up is only supported by REV2 - Does not support macOS, ChromeOS, Linux - COM retention - Simple install / operation - 12in (30cm); TIUSB3410 Chipset; Dual buffers for data transfer; TAASpecifications
Product Overview
Physical & Environmental
Enclosure Type | Plastic |
Connector Plating | Nickel |
Cable Jacket Material | PVC - Polyvinyl Chloride |
Operating Temperature | 0°C to 50°C (32°F to 122°F) |
Storage Temperature | -10°C to 70°C (14°F to 158°F) |
Humidity | 5% to 95% RH, non-condensing |
Cloud Management & Licensing
Driver Installation | Manual or automatic via Windows Update |
Bundled Software | Driver software included or downloadable |
Interfaces
Interface Type | USB 2.0 to RS-232 (DB9) |
Port Count | 1 Serial Port |
Connector A | USB Type-A Male |
Connector B | DB9 Male (RS-232) |
Baud Rate / Data Transfer Rate | Up to 128 Kbps |
Data Bits | 5, 6, 7, 8 |
Stop Bits | 1, 1.5, 2 |
Parity | None, Even, Odd, Mark, Space |
FIFO Buffer | 512 Bytes Transmit, 512 Bytes Receive |
Flow Control | Xon/Xoff, RTS/CTS, DSR/DTR |
Compliance & Origin
TAA Compliant | Yes |
Country of Origin | Taiwan |
Certifications | CE, FCC, RoHS |
Warranty | 2 Years |
UPC | 065030827270 |
Advanced Security Features
Secure Data Transmission | No encryption, standard RS-232 protocol |