Standard | Also Known As | Mbps | MiB/s | Wires | Max length |
---|---|---|---|---|---|
USB 1.1 | Full Speed | 12 | 1.5 | 4 | 4m |
USB 2.0 | Hi-Speed | 480 | 60 | 4 | 4m |
USB 3.2 Gen 1 | USB 3.0 USB 3.1 Gen 1 |
5000 | 625 | 8 | 3m |
USB 3.2 Gen 2 | USB 3.1 USB 3.1 Gen 2 |
10000 | 1250 | 8 | 2m |
USB 3.2 Gen 2x2 | USB 3.2 |
20000 | 1250 | 12 | 1m |
USB 4 | USB4 Gen 2×2 |
20000 | 2500 | 12 | 0.8m |
USB 4 (Opt) | USB4 Gen 3×2 |
40000 | 5000 | 12 | 0.8m |
USB Gen A x B
A = Generation
B = Num lanes used
Gen Name | Gbps | Lanes | Total Gbps | Marketing Name |
---|---|---|---|---|
USB 3.2 Gen 1×1 | 5 | 1 | 5 | SuperSpeed USB 5Gbps |
USB 3.2 Gen 2×1 | 10 | 1 | 10 | SuperSpeed USB 10Gbps |
USB 3.2 Gen 1×2 | 5 | 2 | 10 | |
USB 3.2 Gen 2×2 | 10 | 2 | 20 | SuperSpeed USB 20Gbp |
USB 4 Gen 2×2 | 10 | 2 | 20 | USB4 20Gbps |
USB 4 Gen 3×2 | 20 | 2 | 40 | USB4 40Gbps |
4 wires: PWR, GRD, D+, D-.
8 wires: PWR, GRD, D+, D-. RX+ , RX- , TX- , TX+.
16 wires: PWR, GRD, D+, D-, RX1+, RX1-, RX2-, RX2+, TX1+, TX1-, TX2-, TX2+ (USB-C only).
Note: 1 USB lane = 1 twisted wire pair +/-.
Note: 4 wires = 1 half-duplex lane, 8 wires = 1 lane, and 12 wires = 2 lanes,
USB 2.0[1] Apr, 2000
USB 3.0[2] Nov, 2008
USB 3.1[3] Jul, 2013
USB 3.2[4] Sep, 2017
USB 4.0[5] Aug, 2019
^ | [1] | USB 2.0 Specification |
^ | [2] | USB 3.0 Specification |
^ | [3] | USB 3.1 Specification |
^ | [4] | USB 3.2 Specification |
^ | [5] | USB 4.0 Specification |