SinSiXX



USB Cheat Sheet

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

Gen naming Convention and lanes

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

Cables

 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,

Specifications

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

References

^ [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


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