Pinout micro usb connector

The initial development of USB-connectors was carried out in 1994 by American engineer Ajay Bhatt, as well as a whole team of qualified computer companies such as Intel, Microsoft, Apple, Hewlett-Packard and many others.

The developers were going to make it end up in an ultimately universal port that could be used for most modern devices when, after connecting certain equipment to a computer, it either began to work instantly, or immediately after the user installed the appropriate drivers. Pinout micro-USB and a standard connector allows you to completely replace the usual at the time COM and LPT-ports, while providing a data transfer rate of more than 115 kbit / s. In addition, the port was parallel so that it was possible to organize the connection of several sources to it, as well as use a “hot” connection that does not require a reboot or shutdown of the PC.

First start

The first non-industrial model of the port, which had a code index of 1.0s and a data transmission rate of no more than 12 Mbps, was released in 1995-1996. In mid-1998, a final revision was made using automatic speed support, ensuring a stable connection, as a result of which the port functioned normally at a speed of 1.5 Mbit / s. In a subsequent modification, a new USB 1.1 was released. The pinout of micro USB was not yet envisaged, and in general the devices were not yet so actively used, despite the fact that motherboards as well as various devices that had this connector had been actively produced since mid-1997.


pinout micro usb

In 2000, the first USB 2.0 was released, which was capable of supporting speeds of up to 480 Mbps. The basic principle of this development was that the device could be connected to the port of old devices that were based on USB 1.1. At the same time, the first 8 MB flash drive appeared, which was provided for this port. In 2008, development has progressed even further, USB 3.0 has already been released, the data transfer rate of which was already maintained at up to 4.8 Gbit / s.


pinout micro usb connector

Pinout micro USB is today quite popular. Most likely, you have once met with such a problem when you simply do not have the USB adapter you need right now. Situations can be very different - the device is broken, lost, not commercially available, its length is not enough and there are a number of others. Knowing the technology of how micro USB pinouts are performed, you can solve this problem completely by yourself.

If you know how to pin out, and also have the skills to work with a soldering iron, then in this case you will not have any problems with existing USB-connectors. At the moment, these are the most common connectors in modern digital technology, that is, today not only not a single mobile phone of the latest generation, but not a single gadget, can do without them.

Immediately it should be noted that, in addition to the most common, there is also another additional type of USB. One has only to remember what the adapter looks like from a scanner or a computer, because with the naked eye one can determine that the connectors on such an adapter are different.

The connector that will be connected to the computer is active and is indicated primarily by the letter A. The same connector that will be connected to the scanner is a passive device and is indicated by the letter B.

USB 2.0

micro usb connector pinout

In this case, there are several types of wires with different types of connection:

  • + 5I (red wire), is intended for power. The maximum current supply in this case does not exceed 500 mA.
  • D- (white wire) Data -.
  • D- (green wire) Data +.
  • GND (black) - is a common wire, which was originally intended for the ground.


pinout micro usb for charging

This connector is by far the most common if you need to connect any smartphone or tablet. They differ by an order of magnitude smaller in comparison with traditional USB-interfaces that are popular today, as a result of which the pinout of micro USB is somewhat more complicated. Another feature that distinguishes such a connector is to mention the fact that it has five different contacts.

Marking of such connectors is:

  • Micro-AM (BM) - male.
  • Micro-AF (BF) - female.

Features micro-USB

micro usb pinout samsung

It is worth noting that the feature that the pinout of a micro USB connector has affects not only the size of this device, but also the fact that it has an extra pin.

  • Red wire - VBUS.
  • White wire D- (Data -).
  • Green wire D + (Data +).
  • ID - in the passive connectors of format B it is not used. If we are talking about active type A connectors, then in this case it is locked to ground to maintain the OTG function.
  • The black wire is ground (GND).

Separately, it should be said that almost always the pinout of the micro USB connector also provides for the presence of a Shield wire in which no insulation is applied. In this case, the role of the screen is assigned to it, while it is not marked in any way, and also does not differ in some individual number.

Also worth noting is another concept. Most likely, each person understands approximately what constitutes an extension cord, and at the same time understands that different connectors are used there. As in all other types of connectors, the concept of male-female is also included in USB, where male is a plug and female is a jack.

How is the wiring?

micro usb pinout

There are two options for how to unplug the micro-USB connector.The pinout can be carried out just directly in front of the mirror when a connector is placed in front of it. However, at the same time, you should understand that you can just make a mistake in this way, or, in the end, you should not be able to solder what was needed. The second option is to just mentally flip the connector.

There is also another way how micro USB can be pinned out for charging or something else. This method is more relevant in the event that you do not have the opportunity to use a collapsible USB connector, which is not so often, but it is still found on sale today in various establishments. You have a USB - miniUSB cable, from which you need to make a USB - microUSB cable. In this case, you have the last type of cable, but at the other end is not a standard USB. In this situation, the best solution would be to simply solder the desired cable, connecting various wires together, and it is often the users who use the micro USB pinout. Samsung devices often do not have the required connector, so in this case this technology is also relevant.

How to connect?

pinout micro usb on the tablet

The original cable is taken, after which the miniUSB connector is cut off.The cut end is completely free of the screen, while the other four wires are stripped and tinned. Now we take a cable with a microUSB connector, after which we also cut off the excess from it and carry out the same procedure. It now remains to simply solder the wires together, after which the connection is isolated each separately. Then you can simply use some kind of insulation (for example, foil), and roll up already isolated connections all together. The resulting screen is finally wrapped with tape or tape to prevent it from flying off later.

The main thing to remember is that before such an unusual pinout of a micro USB cable is performed, you should not forget about pinouting the active and passive connectors as well. For this reason, it is recommended to initially determine what pinout is used on your cable.

Under charge

Any standard charge that is based on using USB, involves the use of only two wires - this is + 5V, as well as a common contact. That is why if you need to solder the first and fifth terminals, and the most important thing in this case, when energizing, is to do everything in accordance with the polarity of your equipment.

The most important thing: regardless of what exactly you pinout the USB connector for, you have to do everything very carefully and with the knowledge of technology. Always try to anticipate various errors in advance and perform every action in a measured way, because if some connectors are plugged in incorrectly or you don’t solder something, there is a possibility that the cable will not work properly and be used connecting multiple devices.

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