 Certified USB logo |
| Type | Bus |
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| Production history |
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| Designer | Digital Equipment Corporation, IBM, Intel, Microsoft, NEC an Nortel |
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| Designed | 1996 |
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| Manufacturer | Intel, Compaq, Microsoft, NEC, Digital Equipment Corporation, IBM, Nortel |
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| Supersedit | Serial port,parallel port,gemme port,Apple Desktop Bus,PS/2 connector |
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| General specifications |
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| Length | 2–5 m (6 ft 7 in–16 ft 5 in) (bi category) |
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| Width | 12 mm (A-plug),[1] 8.45 mm (B-plug); 7 mm (Mini / Micro-USB) |
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| Hicht | 4.5 mm (A-plug),[1] 7.78 mm (B-plug, pre-v3.0); 1.5–3 mm (Mini/Micro-USB) |
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| Het pluggable | Yes |
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| Freemit | Yes |
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| Cable | 4 wires plus shield (pre-3.0); 9 wires plus shield (USB 3.0) |
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| Pins | 4: 1 supply, 2 data, 1 grund (pre-3.0); 9 (USB 3.0); 11 (powered USB 3.0); 5 (pre-3.0 Micro-USB) |
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| Connector | Unique |
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| Electrical |
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| Signal | 5 voltDC |
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| Max. voltage | 5.00±0.25 V (pre-3.0); 5.00+0.25-0.55 V (USB 3.0) |
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| Max. current | 0.5–0.9 A (general);
5 A (charging devices) |
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| Data |
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| Data signal | Packet data, defined bi specifications |
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| Width | 1 bit |
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| Bitrate | 1.5/12/480/5,000/10,000 Mbit/s (dependin on mode) |
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| Max. devices | 127 |
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| Protocol | Serial |
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| Pin out |
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 |
| The staundart USB A plug (left) an B plug (richt) |
| Pin 1 | | VCC (+5 V) |
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| Pin 2 | | Data− |
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| Pin 3 | | Data+ |
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| Pin 4 | | Ground |
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