USB-C to DisplayPort Adapter (USBC-DP) is not bi-directional?


The “VESA DisplayPort Alt Mode for USB Type-C Standard Feature Summary” pdf document describes a USB-C to DisplayPort cable that is bi-directional.

The Amazon product page says the USBC-DP is not bi-directional. The Plugable product page is not as clear and only says that the USBC-DP supports DisplayPort displays.

There are some USB-C displays that a bi-directional cable might be useful for (those that don’t use USB-C for power, as DisplayPort only has 1.65W). Future Thunderbolt 3 Displays using a Titan Ridge controller will be able to receive DisplayPort input through their Thunderbolt 3 port.

So why did you choose to make a cable that is not bi-directional? What is the difference in hardware and price?

Moshi seems to have the only bi-directional USB-C to DisplayPort cable and it supports DisplayPort 1.4 and it’s twice as expensive (but I don’t know if that’s because of the DisplayPort 1.4 capability, or the bidirectional capability, or the VESA certification).



Thanks for reaching out to us!

Our USBC-DP cable and adapters are not bi-directional, the cable can take a USB-C or Thunderbolt 3 DisplayPort Alternate Mode source and output to a DisplayPort 1.2 destination, and will not work in reverse. While there are currently very few USB-C/Thunderbolt 3 monitors we do expect to see more using the new Titan Ridge chipset you mentioned and are looking into adding a DisplayPort to Type-C cable or reversible cable to our product line, however we have not yet found a solution that is entirely satisfactory.

When we find a solution that we believe will work for all USB-C displays and DisplayPort source it will receive a full blog post on our website!

Please let me know if you have any additional questions.

Plugable Technologies



We’re closing this thread due to inactivity, but if you have any further questions please feel free to contact and we’ll be happy to help.


Plugable Technologies