If you go out with your friends and your phone will not be able to find the adapter when it is almost out of power, then **** can only buy another *****

With the popularity of various digital devices, especially mobile phones and tablets, the number of USB devices around us has gradually increased. Every mobile phone and tablet requires an adapter (charging head) to charge. However, although these devices use USB interface , the data cables of these devices are not exactly the same. If you go out with your friends, mobile phone cannot find the adapter when it is almost out of power, then can only buy new one. After all, there are many brands of . . These data cables are the same at one end of the PC, but when connecting to the device, they usually use various different interfaces for size considerations. Even if you look at the interfaces of the devices in your hands now, can you really call them their names? Make up for these possible missed knowledge today. Below and . Learn about the common USB, micro USB, and Type-Ch definition and the difference ! ! !

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The three commonly used interfaces

(1)Type-A: Standard version of USB interface

Type-A is our most common type of USB interface, commonly used on computers. But it has some significant problems: there are directional requirements. The connector (male port) must be inserted into the interface (female port) from a specific direction, but because the two sides of the USB male port are very close, this insertion process often goes wrong.

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(2) Micro: USB standard for mobile devices

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

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(3) Type-C: It may become the mainstream

Type-C Although it has appeared for a short time, it can be foreseen that with the maturity of USB Type-C technology, various notebooks, tablets and even smartphones in the future will begin to popularize USB Type-C interface.

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USB

USB, (English: Universal Serial Bus, abbreviated as USB), and the general serial bus is a serial bus standard connecting computer systems to external devices . It is also a technical specification for input and output interfaces. It is widely used in information and communication products such as personal computers and mobile devices. It is an interface technology applied in the PC field. The USB interface supports the device's plug-and-play and hot-swap functions. USB was jointly proposed by Intel , Combat , IBM, Microsoft and other companies at the end of 1994.

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The complicated interface system, coupled with the limitation that drivers need to be installed and restarted before they can be used, will inevitably cause trouble for users. Therefore, it is inevitable to create a unified and hot-swap external transmission interface. It is a data transmission line for computer-connected devices, including a dual-head computer-type USB universal serial bus and a computer-type and 1 mobile phone.

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Micro USB

Micro USB is a portable version of the USB 2.0 standard. It is smaller than the Mini USB interface used by some mobile phones, saves space, has a plug-in and unplugging life and strength of up to 10,000 times, and has a blind plug-in structure design. Micro-USB standard supports the current USB OTG function, that is, in the absence of a host (such as a personal computer), data transmission can be directly realized between portable devices, compatible with USB1.1 (low speed: 1.5Mb/s, full speed: 12Mb/s) and USB 2.0 (high speed: 480Mb/s), and provides data transmission and charging. It is especially suitable for high-speed (HS) or higher data transmission. It is the best choice for connecting small devices (such as mobile phones, PDAs, digital cameras, digital cameras, portable digital players, etc.). It can also provide convenience for the car. You only need a USB car charger and a MICRO USB data cable to charge the mobile phone emergency. And there is a 5V output interface directly on high-end cars and is connected to a MICRO USB cable to charge the phone. MICRO USB is widely versatile and easy to use.

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Micro-USB is the next generation specification of Mini-USB. The definition of the Micro series includes the Micro-B series slots used for standard equipment; the Micro-AB slots used for OTG equipment; Micro-A and Micro-B plugs, and cables. What's unique about the Micro series is that they include a stainless steel shell, and it's no problem to plug and unplug it tens of thousands of times.

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Type-Ch

Type-C interface, referred to as USB-C, is located at the bottom of a smartphone and is used for charging, data transmission and other purposes most of the time. The biggest feature of the Type-C double-sided pluggable interface is that it supports dual-sided insertion of USB interface, which officially solves the global problem of "USB can never be plugged in accurately", and plug in the front and back sides at will. At the same time, the USB data cable used with it must also be thinner and lighter.

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, USB Type-C 1. Ultra-thin appearance

Thinner body requires thinner ports, which is also one of the reasons why USB-C came into being. The USB-C port is 0.83 cm long and 0.26 cm wide. The old USB port is 1.4 cm long and 0.65 cm wide, it looks outdated. This also means that the end of the USB-C data cable will be one-third of the size of the standard USB-A type data cable plug.

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, no front and back

Like Apple's Lightning interface, the front and back of the USB-C port are the same. That is to say, no matter how you plug in this port, it is correct. Users don't have to worry about the positive and negative problems caused by traditional USB ports.

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, fast

Theoretically, the maximum transmission rate of the USB-C port is 10Gb per second. But Apple says the USB-C port of the new MacBook has a maximum transfer rate of 5Gbps. The maximum output voltage is 20 volts, which can speed up charging time. The USB-A model has so far the ultimate transmission rate is 5Gbps and the output voltage is 5V. The emergence of

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Type-C interface can be said to have saved obsessive-compulsive disorder and Virgo, and has also allowed headaches such as the "Law of Attraction" and "Murphy's Law" to disappear.

OK. Although I know what functions the Type-C interface can implement and what it is, many people may have a question like being stuck in their throat, that is, "Why is it called Type-C? Where did A and B go?" Indeed, where did A and B go? This is indeed a good question. In addition, the following will discuss the development of USB standards and interfaces in depth to let everyone understand clearly.

Find out all specifications USB interface

Since there is Type-C, there will definitely be Type-A and Type-B. What exactly Type-A and Type-B look like? You can see at a glance when you look at the picture below:

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From left to right, the standard Type-A interface, Type-B interface and Type-C interface. After reading the picture, you should suddenly realize: It turns out that the Type-A interface is the most commonly used standard USB interface! Indeed, the English name of the Type-A interface is "Standard Type-A USB", which means it is a standard USB interface, and other shapes of USB interfaces are its derivatives.

For Type-B USB interface, although its appearance rate is far less than that of the standard Type-A interface, I believe everyone is familiar with it, because many external USB devices such as printers, monitor USB HUBs and other external USB devices use Type-B USB interfaces. Generally speaking, the USB interfaces on PC are standard Type-A, while external devices mostly use Type-B.

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Finally, it is the brand new Type-C interface. It has a much smaller size than Type-A and Type-B, and its size is even comparable to Mini-USB and Micro-USB, making it the latest USB interface form factor standard. In addition, Type-C is an interface type that can be applied to both PC (master device) and external device (slave device), which is epoch-making.Let’s take a look at the Mini-USB and Micro-USB mentioned just now....

Don’t be dizzy after reading it: USB interface family photo

After the Type-C interface was released, a friend asked: “Is Mini-USB called Type-A, Micro-USB called Type-B, and the new one called Type-C?” In fact, the author has told you that this is not the case. After reading the family photo of the USB interface below, I believe everyone will understand.

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USB interface family portrait (except Type-C)

nothing is as intuitive as a picture. The Mini-USB and Micro-USB that we often use are all born based on the USB2.0 transmission protocol. What's amazing is that they are also divided into Type-A and Type-B respectively. In the USB3.0 era, due to the increase in transmission speed, only the Type-A USB3.0 interface remains the same as before, and both Type-B and Micro-USB have changed their appearance (increased in size).

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Since Apple's MacBook first used USB Type-C interface, the outside world has questioned whether Apple's radical use of such a "weird" interface will bring a lot of inconvenience to users? Unexpectedly, in less than a year, Android manufacturers launched devices using USB Type-C interfaces, and Apple once again successfully drove the development direction of the entire industry, like fingerprint recognition. To insert the USB flash drive at least 3 times before it can be successful? Do you have Apple fans and Android fans at home, and you can change the charging cable back and forth? Forgot to bring a converter when taking a tablet to a company meeting? Now, since the USB Type-C, these connection problems have not existed, after all, it may gradually become the mainstream interface in the next few years.

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USB, micro USB and Type-C

For friends who don’t know, it is easy to think that USB and Type-C are two either-or existences, but they are not.

What we usually call mobile phone USB interface refers to micro USB, which can transmit data and charge the mobile phone.

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This is also a data interface that mobile phones have been using in the past few years. This data transmission speed has been continuously improved, but the shape has not changed much.