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Talking about the simple difference between USB data cable 2.0 and 3.0




Release time:

2019-10-17 22:20


The difference between USB3.0 and USB2.0
1. Data transfer rate, 3.0 is SuperSpeed 5.0Gbps, 2.0 is 1.5Mbps, 12Mbps or 480Mbps.
2. Data interface, 3.0 is full-duplex, four-way differential signal independent of USB 2.0 signal, supports simultaneous bidirectional data transmission, 2.0 is half-duplex, dual differential signal, one-way data transmission, need to negotiate the general route in advance Transmission direction.
3. Number of signal lines, 3.0 is 4 SuperSpeed data lines, 2 HighSpeed data lines and 2 power and ground lines, 2.0 is 2 LS/FS/HS data lines, 2 power and ground lines
4. USB3.0 data bandwidth is ten times that of USB2.0, can reach 5Gb/s (480MB/s), and synchronous transmission bandwidth can reach 384MB/s, which is one of the main differences between USB3.0 and 2.0;
5. Low power consumption (about 25% lower power consumption than USB2.0 at 20MB/s data transfer);
6. USB data cable 3.0 is more energy efficient than USB data cable 2.0. For devices that are temporarily waiting, power saving mode can be used.
7. USB3.0 can provide more power through cable (2.5W to 4.5W);
8. USB3.0 is backward compatible and supports USB 2.0 devices, but USB 2.0 does not support USB 3.0.

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