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Copper versions of Thunderbolt 4 cables offer full 40 Gbit/s speed and backward compatibility with all versions of USB (up to USB4), DisplayPort Alternate Mode (DP 1.4 HBR3), and Thunderbolt 3. Released in early 2021, they are also all to be available in three specified lengths: 0.2 m (0.66 ft), 0.8 m (2.6 ft), and 2 m (6.6 ft) – with many ...
Thunderbolt 4 is an implementation of USB4 "40 Gbps". Thunderbolt 4 mandates some features that are optional in USB4 including: backwards compatibility to Thunderbolt 3, minimum PCIe ("32 Gbps") and DP capabilities (2 DP tunnels, "4K60 each", HBR3+DSC). [56]
This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, at which digital interfaces in a computer or network can communicate over various kinds of buses and channels.
[36] [39] These cables are marked with a Thunderbolt logo on both ends. They do not support USB 3 backwards compatibility, only USB 2 or Thunderbolt. Cables can be marked for both Thunderbolt and 5 A power delivery at the same time. [61] Active cables and adapters contain powered electronics to allow for longer cables or to perform protocol ...
It supports 40 Gbit/s throughput, is compatible with Thunderbolt 3, and backward compatible with USB 3.2 and USB 2.0. [44] [45] The architecture defines a method to share a single high-speed link with multiple end device types dynamically that best serves the transfer of data by type and application.
In this way, cables with smaller 5 pin USB 2.0 Micro-B plugs can be plugged into devices with 10 contact USB 3.0 Micro-B receptacles and achieve backward compatibility. USB cables exist with various combinations of plugs on each end of the cable, as displayed below in the USB cables matrix. USB 3.0 Standard-B plug
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