04b4:0008 — CDC ACM serial port
Cypress Semiconductor Corp.
- Vendor ID
- 04b4
- Product ID
- 0008
- Combined
- 04b4:0008
- Decimal
- 1204:8
What is this device?
This is the USB identifier for a CDC ACM serial port manufactured by Cypress Semiconductor Corp.. The vendor ID 04b4 is registered to Cypress Semiconductor Corp. with the USB Implementers Forum, and 0008 is the product ID that Cypress Semiconductor Corp. assigned to this particular model. When you run lsusb on Linux, this device appears as 04b4:0008 Cypress Semiconductor Corp. CDC ACM serial port.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 04b4:0008 Cypress Semiconductor Corp. CDC ACM serial port
You can filter directly with lsusb -d 04b4:0008, or get the full descriptor dump with lsusb -v -d 04b4:0008. Kernel messages from dmesg show the same pair as idVendor=04b4, idProduct=0008.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_04B4&PID_0008 USB\VID_04B4&PID_0008&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04B4&PID_0008"
macOS
$ system_profiler SPUSBDataType
CDC ACM serial port:
Product ID: 0x0008
Vendor ID: 0x04b4 (Cypress Semiconductor Corp.)Driver help
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. Cypress Semiconductor Corp. official support →
Raw usb.ids entry
The exact lines this page is generated from, in the upstream source file:
04b4 Cypress Semiconductor Corp. 0008 CDC ACM serial port