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The Relationship Between USB 3.1 and Type-C Interface


USB 3.1 is based on the latest transmission specification of USB. The new USB 3.1 interface will double the bandwidth to 10Gbps. It is worth noting that the encoding rate has also increased again.


USB 3.0 is 8b10b encoding, that is, in every 10bit data transmitted, only 8bit is the real data, and the remaining 2bit is used as the check code, so the entire bandwidth will be up to 20%  loss, and the new USB 3.1 uses 128b/132b encoding. In 132bit data, only 4bit is used as the check code, and the transmission loss rate is greatly reduced to 3% . Therefore, USB 3.1 is not only an increase in bandwidth, but also Transmission efficiency has also improved a lot.


Compared with the 5V/0.5A of USB 2.0, USB 3.0 provides 5V/0.9A power. But people still hope for a stronger power supply capability, so USB 3.1 increases the maximum allowable standard for power supply to 20V/5A, and power supply is 100W.


USB 3.1 will double the bandwidth to 10Gbps, and it is worth noting that the encoding rate has also increased again. USB 3.0 uses 8b10b encoding, that is, in every 10bit data transmitted, only 8bit is the real data, and the remaining 2bit is used as a check code, so the entire bandwidth will be lost as much as 20%.


USB 3.0

USB 3.0

The new USB 3.1 uses 128b/132b encoding. In 132bit data, only 4bit is used as the check code, and the transmission loss rate is greatly reduced to 3%. Therefore, USB 3.1 is not only an increase in bandwidth, but also transmission efficiency. Improve a lot. Compared with the 5V/0.5A of USB 2.0, USB 3.0 provides 5V/0.9A power. But people still hope for a stronger power supply capability, so USB 3.1 increases the maximum allowable standard for power supply to 20V/5A, and power supply is 100W.


It seems that USB 3.1 has many benefits, but everyone must note that USB 3.1 and USB Type-C are two different things. Strictly speaking, USB 3.1 is a transmission standard, and USB Type-C, to be precise, is an interface standard. There are three interface standards for USB 3.1, namely USB Type A, USB Type B (Micro USB) and the latest USB Type-C.


There is no absolute correlation between USB 3.1 and USB Type-C. To know that there is a USB Type-C interface, it does not necessarily mean that it supports the USB 3.1 standard. The USB 3.1 standard may not necessarily be a USB Type-C interface. You must keep your eyes open and don't be fooled by bad manufacturers.




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