8 months ago

With the popularity of all kinds of digital devices, especially the popularity of mobile phones and tablets, the USB equipment around us is getting more and more. Every cell phone or tablet needs an adapter (charging head) to recharge, though these devices all use USB interface, but the data lines of these devices are not the same.

If you go out with friends, mobile phone running out of power can not find the adapter, it can only buy a new one, after all, many brands, the data line is the same in the end is connected with a PC, but in the end of the connecting device, usually for size considerations with different interface. Even if you look at the interface of the device now, can you really call their names? Make up for the knowledge that may be missed today. Let's know the definition and difference between common USB, micro USB and USB C together!

Three kinds of interfaces we often use

(1) Type-A: Standard USB interface

Type-A is one of our most common type of USB interface, which is commonly used on a computer. But it has some significant problems: the direction. It is necessary to insert the connector into the interface from a specific direction, but because the two sides of the USB Type c portare very close, the insertion process often goes wrong.

(2) Micro: USB standard for mobile devices

At present, most Android phones use Micro USB interface (USB Micro-B), which is still widely used in various mobile portable devices.

(3) Type-C: or will be the mainstream

Although Type-C is not long before, it can be predicted that with the maturity of USB Type-C technology, all kinds of notebook computers, tablet PCs and even smart phones will start to popularize USB Type-C port.


USB (English: Universal Serial Bus, abbreviation USB), and the Chinese referred to as " through the string line, " universal serial bus is a serial bus standard connected computer system and peripheral equipment, technical specification is an input and output interface, is widely used in personal computer and mobile devices etc. communication products, interface technology application in the field of PC.

The USB interface supports plug and play and hot plug functions of the equipment. USB was jointly proposed by many companies such as Intel, Compaq, IBM, Microsoft and other companies at the end of 1994.

The complex interface system, coupled with the need to install the driver and restart the use of the restrictions, can not avoid the trouble of users. Therefore, it is an inevitable trend to create an unitary and hot pluggable external transmission interface. It is a data transmission line that belongs to the computer connected equipment. It has a double head computer USB universal serial bus and 1 computer type 1 mobile phones.

Micro USB

Micro USB is a portable version of USB 2 standard. It is smaller than the Mini USB interface used by some mobile phones, saving space, with up to 10000 times of plug life and intensity, and blind insertion structure design.

The Micro-USB standard supports the OTG functions of USB, which in the absence of the host (such as a personal computer) under the condition that the portable device can be directly realized between data transmission, compatible with USB1.1 (low speed: 1.5Mb/s, speed: 12Mb/s) and USB 2 (speed: 480Mb/s), while providing data transmission and charging, especially suitable for high-speed (HS) or higher rate of data transmission, is connected with small devices (such as mobile phone, PDA, digital cameras, digital cameras and portable digital music player and so on) the best choice.

At the same time, it can also provide convenience for the vehicle, only need USB car charger, and then add MICRO USB data line for mobile phone emergency charging. And on top of the high grade car, the 5V output interface is directly connected to the MICRO USB line to charge the mobile phone. MICRO USB is versatile and easy to use.

Micro-USB is the next generation specification of Mini-USB. The definition of Micro series includes Micro-B series slots for standard equipment, Micro-AB slot for OTG device, Micro-A and Micro-B plug, and cable. The unique feature of the Micro series is that they contain a stainless steel shell, which is not a problem for thousands of inserting.


The Type-C interface, called USB-C, is located at the bottom of the smartphone, most of the time used for charging, data transmission, and so on. The biggest feature of Type-C double faced plug-in interface is to support USB interface double entry. It solves the worldwide problem of "USB is never inserted". At the same time, the USB data line that is used with it must be finer and more portable.

← New generation of wireless charging standards IPhone8 wireless charging power is the highest only 7.5W →