04fa:4201 — DS4201 Audio DAC

This is the USB identifier for a DS4201 Audio DAC manufactured by Dallas Semiconductor. The vendor ID 04fa is registered to Dallas Semiconductor with the USB Implementers Forum, and 4201 is the product ID that Dallas Semiconductor assigned to this particular model. When you run lsusb on Linux, this device appears as 04fa:4201 Dallas Semiconductor DS4201 Audio DAC.

Linux

$ lsusb
Bus 001 Device 004: ID 04fa:4201 Dallas Semiconductor DS4201 Audio DAC

You can filter directly with lsusb -d 04fa:4201, or get the full descriptor dump with lsusb -v -d 04fa:4201. Kernel messages from dmesg show the same pair as idVendor=04fa, idProduct=4201.

Windows

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

USB\VID_04FA&PID_4201
USB\VID_04FA&PID_4201&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04FA&PID_4201"

macOS

$ system_profiler SPUSBDataType
    DS4201 Audio DAC:
      Product ID: 0x4201
      Vendor ID: 0x04fa  (Dallas 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:

04fa  Dallas Semiconductor
	4201  DS4201 Audio DAC

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See all 2 devices from Dallas Semiconductor →