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Black USB-A to DB-9 serial adapter cable with moulded connectors

BFKK

BFKK USB 2.0 to Serial DB-9 RS232 Adapter

SKU CH-AD29-8HF8X

Connects legacy RS232 devices to USB ports on Windows 7, 8, 10, 11, XP, Mac OS 8.6 and Vista, powered by the CH340 driver

  • Adds a serial port to USB-only computers
  • Works with Windows 98 through Windows 11 32 and 64 bit
  • Compatible with USB 1.0 1.1 and 2.0 specifications
  • Supports MCU STC download and LED screen control cards
  • Driver installs automatically after running CH340.EXE

USB 2.0 to DB-9 RS232 adapter

This USB 2.0 to Serial DB-9 RS232 Adapter connects legacy serial equipment to modern computers that lack a native COM port. It suits technicians, engineers and hobbyists who need to program microcontrollers, control LED display panels or communicate with modems and ISDN terminal adapters. The cable works with Windows XP through Windows 11 on both 32-bit and 64-bit editions, plus Mac OS 8.6 and Vista.

Driver-based installation with no external power

The adapter draws power directly from the USB bus, so no separate supply or physical driver disc is required. Installation consists of running the CH340.EXE driver file, plugging the cable into a USB 1.0, 1.1 or 2.0 port, and allowing the operating system to complete the setup. Once finished, a virtual COM port appears in Device Manager, making the attached serial device behave like a plug-and-play USB peripheral.

Broad OS support and MCU compatibility

The bundled CH340 driver enables operation on Win98, 98SE, Me, 2000, XP, Vista, Windows 7, 8, 10 and 11 across 32-bit and 64-bit platforms, as well as Mac OS 8.6. This wide coverage lets the same cable move between older diagnostic laptops and current workstations without hunting for separate drivers. Buyers who need galvanic isolation, industrial-grade locking connectors or USB 3.0 signalling will not find those features here.

Highlights

  • Adds a serial port to USB-only computers
  • Works with Windows 98 through Windows 11 32 and 64 bit
  • Compatible with USB 1.0 1.1 and 2.0 specifications
  • Supports MCU STC download and LED screen control cards
  • Driver installs automatically after running CH340.EXE

Specifications

No published specifications for this item yet.

Questions about this item

Does this USB 2.0 adapter run at full 12 MB/s speed?

It supports USB 1.0 and 1.1 and is compatible with USB 2.0, with full-speed transfer mode capped at 12 MB/s.

What physical connector does the serial end use?

The serial end terminates in a standard 9-pin DB-9 male RS-232 connector.

Which driver must be run before plugging the cable in?

Run the CH340.EXE installer first, then connect the cable so Windows can bind the driver to the new COM port.

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