Talking about the simple difference between USB data line 2.0 and 3.0
2021-04-07
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-channel differential signal independent of USB 2.0 signal, supports simultaneous two-way data transmission, 2.0 is half-duplex, dual-channel differential signal, one-way data transmission, the total route needs to be negotiated in advance Transmission direction
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-channel differential signal independent of USB 2.0 signal, supports simultaneous two-way data transmission, 2.0 is half-duplex, dual-channel differential signal, one-way data transmission, the total route needs to be negotiated 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. The data bandwidth of USB3.0 is ten times that of USB2.0, which can reach 5Gb/s (480MB/s), and the synchronous transmission bandwidth can also reach 384MB/s. This is one of the main differences between USB3.0 and 2.0;
5. Low power consumption (approximately 25% lower power consumption than USB2.0 when the data transfer volume is 20MB/s);
6. USB data cable 3.0 is more energy-efficient than USB data cable 2.0. For devices that are temporarily in a waiting state, you can use the power-saving mode;
7. USB3.0 can provide more power through the cable (2.5W increased to 4.5W);
8. USB3.0 is backward compatible and supports USB2.0 devices, but USB2.0 cannot support USB3.0.
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