9710:7720 — MCS7720 Dual serial port adapter

This is the USB identifier for a MCS7720 Dual serial port adapter manufactured by MosChip Semiconductor. The vendor ID 9710 is registered to MosChip Semiconductor with the USB Implementers Forum, and 7720 is the product ID that MosChip Semiconductor assigned to this particular model. When you run lsusb on Linux, this device appears as 9710:7720 MosChip Semiconductor MCS7720 Dual serial port adapter.

Linux

$ lsusb
Bus 001 Device 004: ID 9710:7720 MosChip Semiconductor MCS7720 Dual serial port adapter

You can filter directly with lsusb -d 9710:7720, or get the full descriptor dump with lsusb -v -d 9710:7720. Kernel messages from dmesg show the same pair as idVendor=9710, idProduct=7720.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_9710&PID_7720
USB\VID_9710&PID_7720&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_9710&PID_7720"

macOS

$ system_profiler SPUSBDataType
    MCS7720 Dual serial port adapter:
      Product ID: 0x7720
      Vendor ID: 0x9710  (MosChip Semiconductor)

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.

The exact lines this page is generated from, in the upstream source file:

9710  MosChip Semiconductor
	7720  MCS7720 Dual serial port adapter

• 9710:7703 MCS7703 Serial Port Adapter
• 9710:7705 MCS7705 Parallel port adapter
• 9710:7715 MCS7715 Parallel and serial port adapter
• 9710:7717 MCS7717 3-port hub with serial and parallel adapter
• 9710:7730 MCS7730 10/100 Mbps Ethernet adapter
• 9710:7780 MCS7780 4Mbps Fast IrDA Adapter
• 9710:7784 MCS7784 115.2Kb IrDA Adapter
• 9710:7810 MCS7810 Serial Port Adapter

See all 14 devices from MosChip Semiconductor →