- Description
- Specifications
1-Foot USB to DB9 RS232 Serial Adapter Cable with FTDI FT232R Chipset, COM Port Retention, Level-4 ESD Protection, and Interchangeable DB9 Hardware for Reliable DTE Serial Communication
The StarTech 1P1FFC-USB-SERIAL is a 1-foot (30 cm) USB to DB9 serial cable that adds an RS-232 serial port to any computer through USB-A, connecting directly to DCE serial peripherals like barcode scanners, receipt printers, POS terminals, and industrial sensors. The FTDI FT232R chipset delivers reliable communication at baud rates up to 921.6 Kbps with 128-byte RX and 256-byte TX FIFO buffers, while COM port retention automatically preserves the assigned COM port number through disconnections and reboots for stable application configurations.
The straight-through DTE pinout with a DB9 male connector pairs directly with standard DCE serial devices without requiring crossover cables or null modem adapters. Gold-plated connectors and copper shielding maintain signal integrity, and Level-4 ESD protection rated at 15kV air and 8kV contact safeguards connected equipment in static-prone environments. At just 0.07 lb with a rugged molded TPE housing rated from -40 to 80 degrees Celsius, the 1-foot cable length keeps workstations clean while providing enough reach for nearby peripherals.
Where the StarTech USB to DB9 Serial Cable Fits
- POS systems and retail environments connecting USB-equipped PCs to serial peripherals where the straight-through DTE pinout plugs directly into receipt printers, barcode scanners, and cash drawers without crossover cables, and COM retention ensures the port assignment stays locked after reboots or cable swaps
- Industrial monitoring setups with sensors and controllers requiring RS232 communication where the FTDI FT232R chipset provides 921.6 Kbps throughput with full parity and data-bit configuration, Level-4 ESD protection guards against static discharge on factory floors, and the -40 to 80 degree operating range handles extreme temperature environments
- IT workstations managing network equipment through serial console ports where the 1-foot cable length keeps the connection compact at the desk, interchangeable DB9 nuts and screws secure the adapter to devices with either mounting standard, and TX/RX/USB LEDs provide instant visual confirmation of data flow and connection status
What the StarTech USB to DB9 Serial Cable Delivers
- FTDI FT232R with 921.6 Kbps Throughput: Industry-standard FTDI chipset supports baud rates up to 921.6 Kbps with 128-byte RX and 256-byte TX FIFO buffers, configurable 7/8 data bits, 1/2 stop bits, and five parity modes for broad serial protocol compatibility.
- COM Port Retention with Auto-Install Drivers: Automatically preserves the COM port assignment through cable disconnections and system reboots, with drivers that auto-install on Windows 7+, macOS 10.15+, ChromeOS, and Linux for plug-and-play deployment.
- Interchangeable DB9 Mounting Hardware: Pre-installed DB9 nuts secure the adapter to devices with threaded studs, or swap to the included slotted thumbscrews for compatibility with serial peripherals and cables that use screw-mount connectors.
- Level-4 ESD and Industrial-Grade Build: 15kV air and 8kV contact ESD protection with copper EMI/RFI shielding, gold-plated connectors, and molded TPE housing rated for -40 to 80 degrees Celsius delivers reliability across industrial, commercial, and field environments.
- Real-Time LED Diagnostics: Dedicated TX, RX, and USB LED indicators provide instant visual monitoring of data transmission, reception, and USB enumeration status for quick troubleshooting without software tools.
How to Connect DB9 to USB
The StarTech 1P1FFC-USB-SERIAL connects the DB9 male end directly to any standard DCE serial device and the USB-A end to a computer port. Drivers install automatically on supported operating systems, and the adapter appears as a standard COM port in Device Manager (Windows) or /dev/tty (macOS/Linux). COM retention locks the port assignment so serial applications maintain their configuration even when the cable is temporarily unplugged or the system restarts, eliminating the need to reconfigure port settings after each reconnection.
