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Universal Serial Bus 3.0 (USB 3.0) is a hardware communication interface used to connect peripheral devices to a digital unit or computer. It is the third generation of the USB interface developed in 2008 and standardized by USB Implementers Forum (USB-IF).
The USB 3.0 interface provides a faster data transfer rate (DTR) than previous USB versions. USB 3.0 uses a dual-bus structural design, whereas earlier versions use a serial interface. The USB 3.0 also replaces device polling (checking connections or determining the need to communicate) with an interrupt architecture protocol.
USB 3.0 is also known as SuperSpeed USB.
A USB 3.0 device may be plugged into a USB socket and used as a USB power supply for direct current (DC) in connecting portable devices.
Compared to older USB versions, the USB 3.0 provides various features:
The USB 3.0 has 4-pin architecture, versus earlier versions. The USB 3.0 Type A plugs and sockets are backward compatible with USB 2.0, but USB 3.0 Type B plugs do not accept earlier socket versions.
The USB 3.0 was designed to increase power input, decrease power consumption and increase DTR speed. Currently, the USB 3.0 standard supports a DTR of up to 5 Gbps. Typically, the throughput is 4 Gbps, and the USB-IF considers a DTR of 3.2 Gbps attainable.
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