What is better about USB3.0 than USB2.0

There are many types of USB connectors, whether USB 3.0 or USB 2.0, there are many orders, but overall USB 3.0 connectors are better. The USB 3.0 connector was released in 2018. It is more than 8 years away from the USB 2.0 product. Do you know what advantages the USB 3.0 connector has over the USB 2.0 connector? The Konnra connector engineer will come to you for details. Introduce how the connector USB 3.0 is better than USB 2.0.

USB type-A 3.0

To compare where the USB 3.0 connector is better than the USB 2.0 connector, there are five aspects that we can’t get around: transmission rate, physical bus, power consumption, bandwidth, and bus utilization. The specific contents are as follows :

1. Transmission rate

The USB 2.0 connector provides a transmission rate of 480 Mbps, while the USB 3.0 connector provides a transmission rate of 4.8 Gbps. The transmission speed of the USB 3.0 connector is 10 times higher than that of the USB 2.0 connector.



2. Physical bus
USB 3.0 connectors have doubled the number of wires compared to USB 2.0 connectors, from 4 to 8 times. Because extra wires require more cable and connector space, new connectors such as USB3.0 connectors are designed.
3. Power consumption
The USB 2.0 connector provides up to 500 mA, and the USB 3.0 connector provides up to 900 mA. Using a USB 3.0 connector can provide more power for the device when needed, and save power when the device is connected but idle.
4. Bandwidth
The USB 3.0 connector uses two unidirectional data paths, one for receiving data and the other for transmission, while the USB 2.0 connector can only handle one data direction at any time, without

It is a one-way communication.

5. Bus utilization

The USB 3.0 connector has a new function (using the data packets NRDY and ERDY) than the USB 2.0 connector. Its main function is to let the device asynchronously notify the host that it is ready.

In summary: USB 3.0 connectors provide better speed and more efficient power management than USB 2.0 connectors. Although the USB 3.0 connector is backward compatible with USB 2.0 standard devices, when these devices interoperate, the data transfer speed is limited to USB 2.0 level.




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