The characteristics and connections and Difference of USB 3.1 and Type-C

- Dec 27, 2017 -

The characteristics and connections of USB 3.1 and Type-C


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 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.


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