3 months ago

The application of USB3.1 and USB Type-C has been more and more widely. However, some people still don't know the difference between the two. Some technology media will even confuse the two in the report, and more unscrupulous manufacturers use this to deceive consumers. So what is the relationship between USB3.1 and USB Type-C?

We must first be clear: USB3.1 and USB Type-C hub are totally different.

Strictly speaking, USB 3.1 is the latest transmission standard based on USB. Compared with the previous generation of USB3.0, the new USB 3.1 increases the bandwidth and greatly improves the coding rate.

USB 3 is encoded by 8b/10b. In each of the 10bit data transmitted, 2bit exists as a check code, so the bandwidth loss will be as high as 20% (2/10). While USB 3.1 uses 128b/132b encoding. In 132bit data, 4bit is used as the check code, so the transmission loss rate is very low, which is only 3% (4/132).

And USB Type-C is exactly an interface standard. There are three kinds of interface standards for USB 3.1, which are USB Type A, USB Type B, and USB Type-C. And USB Type-C has become the most promising interface standard for all interfaces due to various advantages.

So there is no absolute connection between USB 3.1 and USB Type-C. The USB Type-C interface does not necessarily represent the USB 3.1 standard. Similarly, the interface using the USB 3.1 standard is not necessarily the USB Type-C interface.

Compared with the 5V/0.5A of USB 2, the USB 3 provides a 5V/0.9A power supply. But people still want more power supply, so USB 3.1 (SuperSpeed+) increases the maximum allowable standard of power to 20V/5A and power 100W.

USB 3.1 will redouble the bandwidth to 10Gbps, and it is worth noting that the coding rate is also increased again.

It looks like the USB 3.1 benefits, but we must pay attention to USB 3.1 and USB Type-C. Strictly speaking, USB 3.1 is a transmission standard, and USB Type-C, exactly, is an interface standard. There are three interface standards for USB 3.1, which are USB Type A, USB Type B (Micro USB), and the latest USB Type-C.

There is no absolute association between USB 3.1 and USB Type-C. To know that there is a USB Type-C interface, it does not necessarily represent its support for the USB 3.1 standard. The USB 3.1 standard is not necessarily the USB Type-C interface.

usb c to usb hub

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