Back USB 3.0 Bulgarian USB 3.0 BS USB 3.0 Catalan USB 3.0 German USB 3.0 Greek USB 3.0 Spanish USB 3.0 Estonian USB 3.0 Finnish USB 3.0 French USB 3.0 Japanese
 | |||
| Type | USB | ||
|---|---|---|---|
| Production history | |||
| Designed | November 2008 | ||
| Manufacturer | USB 3.0 Promoter Group (Hewlett-Packard, Intel, Microsoft, NEC, ST-Ericsson, and Texas Instruments)[1] | ||
| Superseded | USB 2.0 Hi-Speed | ||
| Superseded by | USB 3.1, USB 3.2 (July 2013, September 2017) | ||
| General specifications | |||
| Length |
Standard-A plug: 12 mm Standard-B plug: 12 mm Type-C (USB-C) plug: 6.65 mm | ||
| Width |
Standard-A plug: 12 mm Standard-B plug: 8 mm Micro-A & Micro-B plugs: 12.2 mm Type-C (USB-C) plug: 8.25 mm | ||
| Height |
Standard-A plug: 4.5 mm Standard-B plug: 10.44 mm Micro-A & Micro-B plugs: 1.8 mm Type-C (USB-C) plug: 2.40 mm | ||
| Daisy chain | No | ||
| Audio signal | No | ||
| Video signal | No | ||
| Pins | 9 (Type A & B) / 24 (Type-C) | ||
| Connector |
(SS) USB 3.0 Standard-A, (SS) USB 3.0 Standard-B, (SS) USB 3.0 Micro-A, (SS) USB 3.0 Micro-B, (SS) USB 3.0 Micro-AB, USB-C (USB Type-C) | ||
| Electrical | |||
| Max. voltage | 5V | ||
| Max. current |
900 mA 1.5 A (BC 1.1/1.2, USB 3.2 single-lane) 3 A (USB 3.2 multi-lane Type-C) | ||
| Data | |||
| Data signal | Yes | ||
| Bitrate |
5 Gbit/s (500 MB/s, USB 3.0) 10 Gbit/s (1.212 GB/s, USB 3.2 Gen 2x1) 20 Gbit/s (2.422 GB/s, USB 3.2 Gen 2x2) | ||
Universal Serial Bus 3.0 (USB 3.0), marketed as SuperSpeed USB, is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. It was released in November 2008. The USB 3.0 specification defined a new architecture and protocol, named SuperSpeed, which included a new lane for a new signal coding scheme (8b/10b symbols, 5 Gbps; also known later as Gen 1) providing full-duplex data transfers that physically required five additional wires and pins, while preserving the USB 2.0 architecture and protocols and therefore keeping the original four pins and wires for the USB 2.0 backward-compatibility, resulting in nine wires in total and nine or ten pins at connector interfaces (ID-pin is not wired). The new transfer rate, marketed as SuperSpeed USB (SS), can transfer signals at up to 5 Gbit/s with nominal data rate of 500 MB/s after encoding overhead, which is about 10 times faster than High-Speed (maximum for USB 2.0 standard). USB 3.0 Type-A and B connectors are usually blue, to distinguish them from USB 2.0 connectors, as recommended by the specification.[2] and by the initials SS.[3]
USB 3.1, released in July 2013, is the successor specification that fully replaces the USB 3.0 specification. USB 3.1 preserves the existing SuperSpeed USB architecture and protocol with its operation mode (8b/10b symbols, 5 Gbps), giving it the label USB 3.1 Gen 1.[4][5] USB 3.1 introduced an Enhanced SuperSpeed System – while preserving and incorporating the SuperSpeed architecture and protocol (aka SuperSpeed USB) – with an additional SuperSpeedPlus architecture adding and providing a new coding schema (128b/132b symbols) and protocol named SuperSpeedPlus (aka SuperSpeedPlus USB, sometimes marketed as SuperSpeed+ or SS+) while defining a new transfer mode called USB 3.1 Gen 2[4] with a signal speed of 10 Gbit/s and a nominal data rate of 1212 MB/s over existing Type-A, Type-B, and USB-C connections, more than twice the rate of USB 3.0 (aka Gen 1).[6][7] Backward-compatibility is still given by the parallel USB 2.0 implementation. USB 3.1 Gen 2 Type-A and Type-B connectors and plugs are usually teal-colored.
USB 3.2, released in September 2017, fully replaces the USB 3.1 specification. The USB 3.2 specification added a second lane to the Enhanced SuperSpeed System besides other enhancements, so that SuperSpeedPlus USB implements the Gen 2x1 (aka USB 3.1 Gen 2), and the two new Gen 1x2 and Gen 2x2 operation modes while operating on two lanes. The SuperSpeed architecture and protocol (aka SuperSpeed USB) still implements the one-lane Gen 1x1 operation mode (aka USB 3.1 Gen 1). Therefore, two-lane operations, namely USB 3.2 Gen 1x2 (10 Gbit/s with nominal data rate of 1 GB/s after encoding overhead) and USB 3.2 Gen 2x2 (20 Gbit/s, 2.422 GB/s), are only possible with Full-Featured USB Type-C Fabrics (24 pins). As of 2023, USB 3.2 Gen 1x2 and Gen 2x2 are not implemented on many products yet; Intel, however, starts to include them in its 11th generation SoC processor models, but Apple never provided them. On the other hand, USB 3.2 Gen 1(x1) (5 Gbit/s) and Gen 2(x1) (10 Gbit/s) implementations have become quite common. Again, backward-compatibility is given by the parallel USB 2.0 implementation.
- ^ "Intel Universal Serial Bus (USB) Frequently Asked Questions (FAQ)". Intel.com. Intel Corporation. Retrieved 26 December 2014.
- ^ "Universal Serial Bus Revision 3.1 Specification". USB.org. USB Implementers Forum. pp. 5–20. Archived from the original (ZIP) on 12 April 2016. Retrieved 12 April 2016.
- ^ McFedries, Paul (2013). "Connecting USB Devices". PCs for Grown-Ups: Getting the Most Out of Your Windows 8 Computer. Indianapolis: Que Publishing. ISBN 978-0-13-303501-8. Retrieved 18 February 2016 – via Internet Archive.
Most PC manufacturers label each USB port using the logo for USB type ... the USB 2.0 logo is a trident, while the USB 3.0 logo is a similar trident with the letters 'SS' (which stands for SuperSpeed) attached.
- ^ a b "USB 3.1 Specification Language Usage Guidelines from USB-IF" (PDF). USB.org. USB Implementers Forum. 28 May 2015. Archived from the original (PDF) on 12 March 2016. Retrieved 10 March 2016.
- ^ "USB 3.1 Gen 1 & Gen 2 explained". MSI.com. Micro-Star International. 5 August 2015.
- ^ "USB 3.2 Specification". USB.org. USB Implementers Forum. Retrieved 30 August 2018.
- ^ "Universal Serial Bus Revision 3.1 Specification". USB.org. USB Implementers Forum. Archived from the original (ZIP) on 21 November 2014. Retrieved 19 November 2014.
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