USB4
Technical standard in computing / From Wikipedia, the free encyclopedia
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Universal Serial Bus 4, marketed as USB4 and sometimes referred to as USB 4.0, is a new technical specification of the Universal Serial Bus data connection standard, released on 29 August 2019 by the USB Implementers Forum.
Type | USB | ||
---|---|---|---|
Production history | |||
Designer | USB Promoter Group | ||
Designed | 29 August 2019; 4 years ago (2019-08-29) | ||
Superseded | USB 3.2 | ||
Daisy chain | No | ||
Audio signal | DisplayPort | ||
Video signal | DisplayPort | ||
Connector | USB-C | ||
Electrical | |||
Max. voltage | 48 V (PD 3.1) | ||
Max. current | 5 A (PD) | ||
Data | |||
Data signal | Yes | ||
Bitrate | 20 Gbit/s (optionally up to 120 Gbit/s) |
USB4 allows sharing a single, high-speed data link with multiple devices dynamically. USB4 devices must support 20 Gbit/s data transfer rates and, optionally, the rates of 40 Gbit/s (USB4 version 1.0), 80 Gbit/s (USB4 version 2.0), and 120 Gbit/s.[1][2] In contrast to prior USB protocol standards, USB4 mandates the exclusive use of the USB-C connector and USB Power Delivery specification.[citation needed]
USB4 architecture is based on USB 3.2 specification.[3] It also incorporates elements of the Thunderbolt 3 protocol; however, interoperability with Thunderbolt 3 products is mandatory only on selected USB4 device types.[4]