Back USB4 Catalan USB 4 Czech USB4 German USB4 Spanish USB4 Estonian یواسبی۴ Persian USB4 French USB4 Japanese USB4 Korean USB4 Dutch
 | |||
| Type | USB | ||
|---|---|---|---|
| Production history | |||
| Designer | USB Promoter Group | ||
| Designed | 29 August 2019 | ||
| Superseded | USB 3.2 | ||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 (Universal Serial Bus 4), sometimes referred to as USB 4.0, is the most recent technical specification of the USB (Universal Serial Bus) data communication standard. The USB Implementers Forum announced USB4 in 2019.
USB4 enables multiple devices to share dynamically a single high-speed data link. USB4 devices must support a data communication bit rate of 20 gigabits (Gbit/s). Versions of the standard optionally support bit 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 standards, USB4 mandates the exclusive use of the USB-C connector and the USB Power Delivery specification.[citation needed]
USB4 architecture builds on the 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]
- ^ "USB4® Specification v2.0". USB-IF. October 2022.
- ^ "USB-IF Announces Publication of New USB4® Specification to Enable USB 80Gbps Performance" (PDF). 2022-10-18.
- ^ USB4® Specification v2.0
- ^ see 2.1.5 (page 15) in https://www.usb.org/sites/default/files/USB4%20Specification.zip