Universal Serial Bus ( abbreviation: USB) is a serial bus standard that connects computer systems with external devices. It is also a technical specification for input and output interfaces. It is widely used in personal computers and mobile devices, Information and communication products. And it extends to other related fields such as photographic equipment, digital television (set-top boxes), game consoles. The latest generation is USB 3.1, with a transmission speed of up to 10Gbit / s.
The size is also relatively small, so it is winning the favor of many manufacturers. This interface is widely used in card readers, MP3s, digital cameras and mobile hard disks.
Micro USB is smaller than standard USB and MINI USB, saving space. The Micro-USB standard supports the current OTG function of USB, that is, without a host (such as a personal computer), data can be directly transmitted between portable devices, while providing data transmission and charging, especially suitable for high-speed (HS) or more High-speed data transmission is the best choice for connecting small devices (such as mobile phones, PDAs, digital cameras, digital video cameras and portable digital players, etc.). Micro-USB has gradually been replaced by type-C USB, but it is still widely used in digital products such as power banks, speakers, Bluetooth headsets, cameras, and driving recorders.
Type A USB
Type-A is actually our very common USB plug. Until now, many PCs, PC accessories, mobile phone chargers, etc. still use this interface, which is currently the most popular USB interface. USB-A is also divided into male and female. The common A-side of the USB-A data cable is the male connector, while the charger is the female connector.
Type B USB
Type-B USB is commonly used on devices such as printers. The type B interface mainly emphasizes the reliability of data transmission, especially the longer cable length, which are all A-B cables.
Type C USB
Type-C USB , also known as USB-C. It is the latest physical interface in the current USB interface. Although it is not as small as Micro USB, it is better in function and performance than Micro USB. And added the positive and negative blind insertion function to be more user-friendly. The smart phone began to completely eliminate Micro USB and changed to type-C USB also proved the power of USB-C design.
In short, Type C USB has the following characteristics:
1-The benchmark design current is 3A. By cooperating with the USB PD protocol, the power supply performance can reach 100W;
2-Positive and negative blind insertion design, more humane;
3-Transmission speed is the current 301 standard;
4-Support HD video and audio signal output;
5-Different functions can be realized through the selection of Pin / EMaker.