10 USB Pinout Explained- USB A, B, C(Male and Female)

USB ports pinout

Last updated on April 5th, 2024 at 03:51 pm

Universal Serial Bus (USB) is an electronic device that gives us a universal medium for connecting peripherals. It can be a keyboard, printer, speaker, a storage device, or a mobile phone.

With time, USBs have evolved in type, functionality, and efficiency. So, it becomes important to select the best variant from the available types that perfectly suit our purpose. In this article, we will discuss the pinout of different USB ports or Connectors to get a better idea of their structure and connection.

Table of Contents

The USB pinout can be divided into two parts: USB Connector Pinout and USB port Pinout. The connector here refers to the device that goes into the USB port. For example, a wired Mouse is connected to the laptop by inserting its connector into the USB port.

Hence the terms Male version for Connector and Female version for the USB port are tossed.

USB type A and type B pinout(male and female)

USB Type-A is used to make a connection with a PC while Type B is used to connect smaller peripherals. In other words, Type A is a downstream connector, while Type B is an upstream connector.

The USB type A is rectangular, while type B has a square-like shape. Both of them have 4 pins. The figure below shows the Pinout of Male and Female versions of both USBs.

USB type A and B pinout

Both these USB types differ in purpose and shape, but their pin connections are the same. Pin 1 is dedicated to the supply and pin 4 is for ground connection. Even pin 2 and 3 take the data input in both these types.

The female port has the PINs in descending order, starting from the right-hand side, while the male connector has them in the reverse order. The table below shows the pinout of both USBs.

USB mini A and mini B

USB Mini was the first improvised version of the normal connectors. This version was launched for both Type A and Type B.

It’s a smaller version of Type A and B, which was extensively used with old mobile phones. The Mini B connector is more popular than the Mini A. The figure below shows the pinout of USB Mini B.

USB Mini B pinout

USB Mini B is thinner and more compact than Mini A. Hence it is used for PDAs, digital cameras, etc. Another significant development imposed on Type Mini is that it has an additional pin to support On-the-GO (OTG) connection. Thus it has 5 pins. The pin connections are given in the table below.

USB micro A and micro B

USB Micro A and B pinout

USB Micro is thinner and gives a higher data transfer speed than the USB Mini. It is often used for charging portable devices and comes in two shapes. Micro A is rectangular whereas Type Micro B has a camper shape.

The USB Micro also has 5 pins similar to that of the USB Mini, where the additional pin supports OTG connectivity. The table below shows the pinout of Micro-A and B.

USB standard 3

USB Standard 3 is widely known as the SuperSpeed Mode that brought a revolution in USB manufacturing. The models used in the third generation are highly advanced, offer faster data speed, have a compact design, and are easy to handle.

Features of USB standard 3

The standard 3 models are accepted globally due to the following benefits:

  • It is capable of transferring data with a speed of 5Gbps and above.
  • Since separate unidirectional paths are used to transmit and receive data, it has a larger bandwidth.
  • With predefined power management states, it offers better power management.
  • It allows the devices to notify about the data transfer, thereby improving the bus usage.

Standard 3 connectors come in the same physical configuration but with an additional 5 pins to handle these advancements. It includes additional ground and dedicated pins for transmission and reception which are called super-speed connections. ( learn more )

The pinout diagrams of the superspeed versions of different USB types are described in the following section.

USB type A 3.0 and type B 3.0

As discussed above, the normal Type A and Type B connectors have 4 pins. But the superspeed versions of Standard 3 have 9 pins which are visible in the figure below.

USB superspeed type A and B pinout

The table below shows the pinout of the superspeed versions.

Micro B 3.0

USB Micro B superspeed pinout

The superspeed version of Micro USB was introduced to Type B. Apart from the existing structure, the five additional pins are placed as an extension. Thus, it has a wider structure. The pinout of the Superspeed Micro B USB connector is given in the table below.

USB type c 3.0

Type C has been the game-changer among all the USB types. It supports data transmission as well as power delivery. Thus, it has become a universal connector for modern devices.

USB C 3.0 pinout

The major attraction of Type C USB is that it is flippable. The figure above shows the pin connections with their corresponding color. The pin connections at the top and bottom are similar, so we don’t have to bother to insert the connector in the correct direction.

It has an incredible data transfer speed of up to 5Gbps and is capable of replacing Ethernet ports to achieve higher data rates. The connection description is given in the table below.

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Usb pinout: the beginner’s guide.

Nowadays, it’s easy to complete projects that involve creating a physical connection between a host controller and several other bus-powered devices because of the USB interface.

USB stands for Universal Serial Bus and has since replaced its predecessors (FireWire, RS-232 serial, and even parallel) as the primary interface for connecting a host to a device.

Normally, the architecture of a USB system includes a host controller, USB ports, and a wide variety of devices. Also, there are cases where you can add additional USB network hubs to create a tree connection structure.

However, that’s just the surface of it all.

So, in this article, we’ll explain everything about the USB and give different USB examples for your circuits.

Let’s begin!

USB Flash drive

USB Flash drive

The USB has four shielded wires that work as pins. Two of these wires are for power supply, while the other two are for differential data signal pairs. Check out the table below for the full USB pinout.

How Does a USB Work?

plugging a USB pen drive on a laptop 

plugging a USB pen drive on a laptop 

Like all connectors, all types of USB connectors have male and female types, making sure you connect your devices in the right direction.

It’s essential to make correct USB connections to allow the system to follow the required USB protocol. So, to establish a connection, USB remote devices feature what we call an upstream connection. These remote devices use this upstream connection to connect to a host. 

Now, the hosts also have downstream connections that allow them to connect to the remote devices.

Furthermore, you can’t use upstream and downstream connections interchangeably. This helps you avoid misconnections and makes sure you connect the USB cable only in the right direction. 

It also helps you avoid several issues like illegal loopback connections and connecting a downstream port to another downstream port.

How it really Works

First, a USB device will show its maximum speed by using pull-up resistors to draw the “D+” and “D-” terminals to 3.3V. Now, the host or hub will also use these pull-up resistors to detect when you connect a compound device to its port. Thus, without a pull-up resistor, the USB won’t detect your connected device or if you have a broken device or broken connector .

So, when you plug in an external device for the first time, the host device scans it and loads the correct driver version required to run the device. To do this, the host uses a product ID/vendor ID (PID/VID)—which the connected hardware or device supplies. Once the host completes the loading of necessary device drivers, the hardware/device will be ready for use. 

Note: USB host controllers have their specifications. We have the Universal Host Controller Interface (UHCI), which works for all USB types, the Open Host Controller Interface (OHCI), which works with USB 1.1, and the Enhanced Host Controller Interface (EHCI), which works with USB 2.0.

USB Connector Types

Originally, the USB cable could only be one of two types, and these two types included “Type A” and “Type B”. Afterward, we got the USB C type, which boasted a better data transfer speed with a more robust system.

Check out the table below for the full overview of the different USB types.

usb pin assignments

Type-A USB Connector Pinout

Type-A USB is the most popular type of USB connector. Plus, you can find them on host controllers, computers, flash drives, and several other items. Also, you can only make downstream connections with the Type-A USB as its sole use is for controllers and hubs.

Flash Drive

Flash Drive

Type-A USB connectors are bigger than other connectors and have flat and rectangular shapes. Plus, friction holds this connector in place, making it easy to connect and disconnect. However, using it in areas where your equipment might vibrate isn’t a great idea.

The Type-A USB has two versions: Male and female versions. The male version is the plug, while the female version is what we know as the socket or port.

Female connector versions are what we find on host controllers, while male connector versions are usually on devices like memory sticks, keyboards, mice, and other connections to storage devices.


  • Works in most personal computers.
  • Also works in television and music systems.
  • You can also find them on gaming consoles and almost all chargers for mobile portable devices.

Type-A USB Pinout

The older versions of the Type-A connector have four pins, while the newer versions have nine pins. Here’s a table showing all the pins of the Type-A connector.

usb pin assignments

Note: all generations of the Type-A USB connector have pins 1 to 4 while third-generation connectors have pins 5-9.

USB-B Pinout

The USB-B is the second connector type that mostly works for connecting peripherals like printers and scanners. Plus, their pinouts have a different arrangement.

It has an almost square shape with a slight bevel at the top end corners of the connector. Also, it uses friction to remain in place when connected.

The Type-B USB port is an upstream connector that you can only find on peripheral devices. Thus, most Type-B USB applications require A to B USB cables.

Here’s an interesting fact:

Type-B USB canceled out the chances of creating a connection between two host computers. Thus, helping to prevent damages.

This connector mainly works for peripherals like printers and scanners.

Like the Type-A USB, the older versions of Type-B have four pins, while the newer 3.0 versions have nine pins. Here’s a table showing all the pins:

usb pin assignments

Also, there is a second type of Type-B connector that has two extra pins:

Source: Wikimedia Commons

USB-C Connector

The USB Type-C is the USB specification that’s slowly replacing the USB-B. It’s a tiny 24-pin reversible plug that works for USB cabling and devices.

Type-C USBs can serve as connectors for both hosts and devices. Plus, you can find Type-C USBs in most recent mobile devices.

USB-C Connector Pinout

The Type-C USB has 24 pins which you can connect reversibly. Here’s a table showing the full list of pins:

usb pin assignments

Micro USB Pinout

A smaller connector became necessary as the technology required smaller USB sizes for many items like modern mobile phones and audio devices. Thus, the USB Microcontroller was born.

The micro USB has both Type-A and Type-B USB versions available, like the 1.0 micro-USB and 2.0 micro-USB. However, these versions are smaller, and you can use them for much thinner lines of equipment.

Additionally, the micro USB is the USB standard and offers better transfer rates from an external source.

Standard older micro USB connectors have five pins, while the less common 3.0 version has ten pins. Here’s a table showing the pins of the micro USB connector:

usb pin assignments

The fourth pin mode is what we call the USB on-the-go (OTG). It allows you to switch between the peripheral and host roles on your devices. It’s also what enables devices to decide which will act as a power source once connected. For instance, plugging an android phone into a laptop. The laptop will charge the phone if you have a charge-only cable, not the phone charging the laptop.

Wrapping Up

It’s worth mentioning that sometimes, it’s possible to use USB A to USB A cables to establish connections between a computer or USB device to another USB device with an A-style female port. So you can transfer data between both systems. 


However, you shouldn’t use the type A to A cable connection to create connections between two computers or a USB hub and two computers. Why? Well, creating such a connection would mean the cable would receive equal amounts of voltage (5V) from both computers. Thus, connecting both power supplies and causing irreparable damage and other issues. Sometimes, it may even cause a fire hazard. 

Well, that wraps up this article. Feel free to reach us if you have any questions, and we’ll be happy to help.

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USB Pinout: Everything You Need to Know

Introduction to usb pinout.

USB connects computers, smartphones, printers, cameras, and more. It has become a common data transport and charging interface since 1996. USB's pinout, which controls how the connector's pins transport data and power, is crucial.

USB pinout connects and transfers data. Its pins transfer data, provide power and determine device orientation. Several USB connectors have different pin configurations. Type-A, Type-B, Mini-USB, and Micro-USB connectors are the most popular.

The most prevalent USB connector on computers and chargers is Type-A. It has two power and two data pins (D+ and D-) (VCC and GND). Printers, scanners, and other power-hungry equipment employ Type-B connectors. It contains five pins: two data, two power, and one ground.

Cameras, smartphones, and tablets employ Mini-USB and Micro-USB ports. They have a ground pin, two data pins, and two power pins. These connectors are more compact than Type-A and Type-B connectors.

USB type A – male and female port

USB pinout is crucial for data transfer, charging, and device performance. The pinout limits data transfer speed, power, and data type. So, understanding USB pinout is essential for troubleshooting and device communication.

Data transport and charging depend on USB pinout. Knowing USB connector types and pinouts helps troubleshoot and ensure device communication. To maintain device connectivity, keep up with USB pinout changes as technology evolves.

Understanding USB Pinout

Different types of USB ports

USB pinout is the connector's pin configuration and how it transfers data and power. Each USB connector has a unique pinout and function. Depending on the connector, USB has four or five pins. Type-A, Type-B, Mini-USB, and Micro-USB connectors are the most popular.

The most popular USB connector, the Type-A, contains four pins: two data pins (D+ and D-) and two power pins (VCC and GND). Power pins power devices, whereas data pins convey data.

Printers, scanners, and other power-hungry equipment employ Type-B connectors. It contains five pins: two data, two power, and one ground. The Type-B connector contains a ground pin and data and power pins like the Type-A connector.

Cameras, mobile devices, and tablets frequently use Mini-USB or Micro-USB charging and data transfer connections. Two power pins, two data pins, and a ground pin make up the standard configuration for these ports. Mini-USB and Micro-USB connectors have fewer data and power pins than Type-A and Type-B connectors.

USB port Pinout colours

USB connector data pins transfer digital signals. D+ and D- pins encode and decode data when transmitting. DC voltage powers linked devices through power pins.

USB pinout defines the connector's pin layout and how they transfer data and power. Troubleshooting and device connectivity require knowledge of USB connector types and pinouts.

USB Data Transfer

Data transferring speeds

USB data transmission is the process of exchanging information between two USB-enabled devices. Information stored digitally can take many forms, from static images to moving ones. The USB protocol defines the rules for data transfer between devices connected via USB.

The USB protocol's multi-layered architecture comprises the physical layer, data link layer, and application layer. Together, these layers provide error-free information exchange between gadgets. The USB cable and connector are part of the physical layer, which also specifies the signal's electrical characteristics. While the application layer specifies the nature of the data being exchanged, the data connection layer controls how that data moves between devices.

Bulk transmission, interrupt transfer, isochronous transfer, and control transfer are the many types of data transfer available over USB. While interrupt transfer is used for inputs from the keyboard and mouse, bulk transfer is utilized for larger data transfers like file transfers. Real-time data transfers, such as audio and video streams, employ isochronous transfer whereas device configuration and status updates use control transfer.

USB speeds vary by version. And USB 2.0 has 480 Mbps data transfer, while USB 1.1 has 12 Mbps.

USB 3.2 allows 20 Gbps data transferring speed. USB data transfer speed and reliability depend on USB cable quality. Several lengths and types of Type-A, Type-B, Mini-USB, Micro-USB, and USB-C cables are available.

USB Power Delivery

USB Power Delivery (USB-PD) lets devices charge faster through USB cables. USB-PD uses USB Type-C connectors and cables and extends the USB standard. The USB-PD protocol allows the host and device to negotiate power, delivering up to 100W across the USB cable. This is a big boost over USB 1.0 and 2.0's 2.5W and USB 3.0's 7.5W.

The USB-PD charges several devices simultaneously, laptops, and other high-powered devices faster. USB-PD lets devices negotiate power for optimal charging.

USB-PD supports USB Type-C connectors, a major benefit. Reversible USB Type-C connectors are easier to use. They can charge laptops and other high-powered gadgets due to their increased data transmission speeds and 100W power output.

USB Power Delivery also powers screens and connects peripherals. USB-PD powers screens without a power cord. USB-PD powers and connects docking stations and external hard drives.

USB Power Delivery lets devices charge faster using USB cables. USB Power Delivery uses USB Type-C connectors and cables and extends the USB standard. USB-PD charges several devices simultaneously, laptops, and other high-powered devices faster. USB-PD may also power screens and connect devices.

USB Pinout Diagram

Different USB ports and pins in them

A USB cable's wiring and connections can be visualized with the help of a pinout diagram. Type-A, Type-B, Mini-USB, Micro-USB, and USB-C are just a few of the varieties of USB connectors available. Pinout diagrams, which display the configuration and functionality of connectors, are specific to each variety.

USB Pinout: Type-A

The most used USB connector is the USB Type-A connector, which is used to link peripherals to a computer. The USB Type-A pinout consists of four pins labelled VBUS (power), D+ (data), D- (data), and GND (ground). The data transmission occurs between the device and the computer via the D+ and D- connections, while the VBUS pin provides power to the device. Electrical ground is provided through the GND pin. If you're having problems with your USB connections, data transfer, or power delivery, studying the USB Type-A pinout diagram should assist.

USB Pinout: Type-B

The USB Type-B connector is commonly utilized on devices like printers and scanners that are linked to a computer. The pinout diagram for USB Type-B comprises five pins, including VBUS (power), D+ (data), D- (data), GND (ground), and ID (identification).

USB Pinout: Mini-USB

The Mini-USB connector is a more compact version of the USB Type-B connector. This connector is frequently found in mobile phones and other portable electronic devices. VBUS (power), D+ (data), D- (data), GND (ground), and ID are the five pins that are included in the pinout schematic for Mini-USB (identification).

USB Pinout: Micro-USB

USB connector is a smaller variant of the USB connector and is often utilized on small devices such as smartphones. It has five pins in its pinout diagram, which are VBUS (power), D+ (data), D- (data), GND (ground), and ID (identification).

USB Pinout: USB-C

Newer devices have USB-C connectors. It provides speedier data transfer and charging and may be plugged in either direction. USB-C has 24 power, data, and miscellaneous pins.

In conclusion, USB pinout diagrams provide a visual representation of a USB cable's wiring and connectors. There are numerous varieties of USB connectors, and each has its own pinout diagram. Understanding these diagrams might be useful for debugging USB connection problems or developing and constructing USB devices.

Troubleshooting USB Connections

Troubleshooting USB connections

Connection, data transfer, and charging issues are just some of the issues that might arise from a faulty USB pinout. To fix USB pinout problems, use these troubleshooting steps:

Step 1 - Check the condition of the cable

Make sure the USB cable you're using isn't broken and is in good working order. Worsening connection and data transfer challenges are bent or broken pins or cables. If the issue remains after trying a different USB cable, it may be time to call IT.

Step 2 - Check the USB port that you going to connect

Checking the USB port you're connecting to is the next step when resolving USB pinout difficulties. Verify that the USB port is undamaged and working properly; a broken USB port might disrupt connections and prevent data from being transferred. Swap out the USB port on your computer or gadget to see if that helps.

Make sure the gadget you're trying to connect is configured to work with the proper USB settings by checking its settings. USB connections and data exchanges might be affected by the various configurations available on various devices. Verify the right configuration of the equipment by consulting the handbook or the settings.

Step 3 - Check the power of the USB port

It's crucial to verify the device's power supply when addressing USB pinout difficulties. Verify the power supply if the USB device is not charging or is not getting enough juice. Verify that the gadget is set up to accept power through USB and that the power source is providing sufficient power. Problems with charging or powering may occur if the USB device's power needs exceed those of the present power supply. These problems may be fixed by checking the power supply and making any necessary modifications.

Step 4 - Check your device drivers are up to date

If you're having problems with the USB port, one good step is to see if there are any updated drivers available. Verify that you have the most recent USB drivers installed on your PC or another device. Problems with connectivity and data transfer can be caused by using outdated drivers. Check the manufacturer's website for updated drivers, and apply them if they're available. If your computer or device isn't fully compatible with the USB device you're trying to connect, this should help fix the problem and allow the devices to communicate.

Step 5 - Finally check with a different device

Testing the USB device on a different computer or device is a helpful troubleshooting step when dealing with USB pinout difficulties. Seeing if the issue persists after connecting the USB device to another device is one possible solution. If the USB device is functional with another computer or device, the issue may lie with the drivers or settings on your computer or device. This can help you zero in on the precise nature of the problem and get to its origin so you can address it effectively.

USB pinout difficulties can be frustrating, but there are various ways to fix them. Examining the USB cable, port, device USB settings, power source, and driver updates, and testing the USB device on another computer or device will help you find and fix the problem. These actions will ensure your USB devices work properly and prevent further troubles. To avoid future troubles, update your computer's USB drivers and utilize high-quality cables and devices.

The USB pinout is a crucial component of USB technology, facilitating accurate data transfer and power delivery among devices that use the USB standard. Familiarity with USB pinout diagrams and troubleshooting USB pinout issues can help you diagnose and resolve problems with USB connections, data transfer, and power delivery. Understanding the USB pinout is essential for maximizing the potential of USB technology, whether you are developing and constructing USB devices or utilizing USB technology to connect and charge your devices.

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USB Pinout | USB 2.0, USB 3.0, Type A, Type B, Mini-B, Micro-B, USB-C

  • April 12, 2024
  • By Leela Prasad

Universal Serial Bus or simply USB is a popular computer interface that we use to connect a variety of peripherals and devices. Some of the things that we connect using USB are Mice, Keyboard, Printers, Game Controllers , Audio Devices, and many more. Apart from computing devices (laptops, tablets, mobile phones), you can find USBs in cars, bikes, power banks, LED Lights, chargers etc. Depending on the type of application and need, there are several USB ports (USB Type A, Type B, micro-USB, Mini-USB, Type-C etc.). If you are working on anything related to USB, then a knowledge of the USB Pinout is crucial.

In this guide, let us take a quick look at the popular USB Ports and their pinouts. If you are interested in learning about different types of computers ports, then take a look at this 16 Different Types of Computer Ports guide.

A Brief Note on USB

Before the development of USB, we had to deal with separate ports for different types of devices. For example, mice and keyboards had PS/2 Ports, Modems has Serial Ports, Printers had Parallel Ports to name a few.

But with the introduction of USB, this has changed completely. You just need a single port to connect all the aforementioned and many other peripherals and devices to a computer.

From an end-user’s perspective, USB is an easy-to-use interface that supports many devices, is hot pluggable and no fiddling with configuration or settings. You plug-in a device and it just works.

All is not good and positive about USB. There are some negatives as well. For example, the main problem with USB is the different types of connectors it has for different devices (USB A, B, C, Micro, Mini etc.).

This is now changing with the development of USB Type C. We can use USB-C for data transfer, power and charging, connecting to displays, docking stations, etc. with a variety of devices (laptops, smartphones, tablets, computers, cars, external drives, power banks etc.). We believe that USB is finally living up to its “Universal” name with USB Type C.

Different Types of USB Ports

We can divide USB connectors and ports into three types: Type A, Type B and Type C. In both Type A and Type B, there are again three different sizes of connectors intended for different classes of devices. They are: Regular, Mini and Micro.

The connectors are also different based on the version of the USB i.e., USB 1.1 and USN 2.0 have a similar connectors and ports but when it comes to USB3.0, they are completely different. USB Type C sorted this whole mess with a single connector.

Before looking at the USB pinout of different USB ports, here is an image of all the USB Connectors.

Let us now take a look at the pinouts of different USB Ports. We are mentioning the USB Pinout only for the female side of the connection. The pinout of the male side will be identical except that it will be a mirror image of the female side.

USB is the most popular type of connector at the moment. With USB Type C, it is very close to achieving the true “universal” stature for data, power display and many more. In this guide, we saw the basics of USB, different types of USB ports, USB Pinout of different connectors and receptacles.

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USB wiring diagram- Micro USB pinout, 7+ Images

If you are  searching for the USB wiring diagram, you are at the right place. The wiring diagram includes any combination of different types of USB connectors. The most common after USB-type A to USB- type C is “micro USB- type B ” to standard “ USB-type A ” which is generally presents in mobile phone chargers.

micro usb charger wiring diagram internal

USB wiring diagram comes in handy when USB port or connector either of them malfunctions or completely out of order, also for engineers and hobbyist who wants to explore the electronics wiring practically.

These cables breakdown occurs due to excessive use of USB wire (here excessive use means repetitive use of wire or connecting port in a short duration of time). Improper use like rugged applications, inappropriate inserting into port, i.e without checking port orientation.

Another practice is bending the wire greater than 90 degrees , which causes the copper wires in the bundle to get damaged due to its slightly brittle property. Copper is having one of the best malleability and ductility properties. And therefore copper is widely used as a conductor in a wire even having this property, the copper wire undergoes degradation.

Before wiring USB you need to know the pin-out diagram of USB. Below is the figure showing the pin-out diagram of the USB micro-B and USB-A wiring diagram.

Type-A USB pinout diagram, micro USB pinout diagram along with USB wiring diagram:

This cable is most commonly used in mobile charger for charging mobile phones and as a USB data cable to connect mobile devices to tranfer files and images between personal computers and phones.

usb wiring diagram micro usb pinout charger cable

Click here for the USB C 3.0 wiring diagram and charger cable internal wiring.

micro usb b pin out wiring, male USB A pinout wiring diagram

Description : USB wiring is simple but not that simple this is because on changing the frame of reference the pinout looks changed. It can be noticed that pin-out the front side be different than that of back side and thus it requires to check the connectivity of both ends with a digital multi-meter (above micro USB pinout made it simple for you).

Table of male USB-A pinout & USB-B pinout:

The table showing pin number and their nomenclature along with its function in short.

  • Pin no.1 showing the power supply ( +VDD ) through that pin the power is supplied to the device or any equipment which is also an indicator of handshake signal, means “the device is connected”.
  • According to the USB standard power supply is +5V .(but note that the capacity of the power supply is different for different USB versions)
  • Whereas, “ pin no. 2 ” ( -D ) is used as a differential data pin, similarly “ pin no. 3 ” ( +D ) is also used as a differential data pin.
  • The work of the differential data pin is to send and receive the data in a particular format called USB protocol.
  • Pin no. 4 is used as ground. The color code for the wire used in the USB cable red, white, green, grey, black for pin numbers 1, 2, 3, 4 and 5.
  • Please take note of type-A & type-B have the same pinout diagram after arranging on the basis of similarity of shape.

Also check, USB OTG wiring diagram & USB C pin diagram and wiring color code

USB pin-out and its connector:

There are the female connectors for each of the male connectors in practical having the same pin-out as that of the male connector. The most common types of connectors are displayed in this image.

Table of mini and micro USB pin-out type-b & type-a:

The pin-out diagram for the micro USB type-B very similar to USB type-A except for the last two pins 4 and 5 . Also, it is the same for micro USB type-a and micro USB type-b. The pin no.1 is +5V acts as a source to the device or source from the device.

Pin no.2 and pin no.3 are data lines (also called differential data lines because its application varies with the requirements).

The pin no. 4 ( ID ) is used for device identification especially in modern devices for OTG connections. For example, in as a smartphone OTG connector detection to connect a USB drive directly to the mobile phone. And the last pin no. 5 is a connection for ground signal which is pin no. 4 type USB-A through a wire.

How to find the USB wiring diagram manually?

Step1 : First of all find out the type of USB connector used in the cable.

Step2: After the identification of the type of USB connector used on both ends, note down the pinout diagram of that particular USB type.

Step3: Note down all the color of the cable and where it is connected to the actual USB connector on a page. (rough sketch diagram will work)

Step4: Now connect connector pin and wires from the clutter according to the color code and pinout of that particular USB connector on the page using a pen, and your USB wiring diagram is ready.

List of standard USB connectors available commercially in the market which you can buy:

1) USB A male to USB B male. 2) USB A male to USB B female. 3) USB A male to mini USB B male. 4) USB A male to micro USB B male. 5) USB A male to USB C male. 6) USB A female to USB C male. (USB C OTG)  and many more.

Micro USB pinout insight and USB-C:

  • The micro USB connector is most commonly used for charging mobile phones and various other portable devices like Bluetooth headset, Bluetooth speaker, Mini drones, Power Banks.
  • Some of the device manufacturers use their own standard of not connecting the data pin , as the cable is only made to work for charging purposes where only power bus/ wire is required to reduce the manufacturing cost.

You must have had thought of the question, why most of the devices use micro USB?

Most of the devices use micro USB due to the fact that it is compact than all of its precedents in shape and size. And after that, no other type of USB is able to replace it except USB-C ©.

USB-C is more complex micro USB-a than micro USB-b. The micro USB-C is simply called as USB-C.

The image and pinout of micro USB C are as follows:

  • You can see a noticeable difference between USB C and micro USB. As you can observe that USB C can be inserted from any of the orientation. On the contrary, micro USB is direction oriented and we have to give attention while inserting it into the device.
  • In case if USB  C port the Pin no. A1 to A12 is a mirror image of Pin no. B1 to B12. Thus, any functional allocation of pins from A shall be substituted to pins from B.
  • USB C has the advantage of orientation, on the other hand, it has the disadvantage of ring complex on the design level for the programmer and engineers.
  • Apart from this, micro USB comes in three variants (they have principally same micro USB pinout) as shown in the figure.
  • Type-C USB is a new connector system replacing the earlier micro USB. A lot of the new budget smartphones that are released  every few weeks have micro USB C ports, they are becoming more popular in the smartphone and gadget category.
  • These micro USB C cables are available in different assemblies in different USB versions for various purposes, from USB C charging/ data cable to USB C OTG cable. You can check USB C wiring diagrams and internal wirings of USB 3.0/ 3.1.

The image and pinout of USB b super speed are as follows:

The USB b Superspeed pinout is the combination of USB b and 5 auxiliary pins which are predominantly used in high-speed External Hard Drives . The description section of the table above is self-explanatory.

These variants along with USB wiring diagram are decided by the usb.org , which is a ‘USB standards organization’ that maintains USB standards and improvise the USB technology and its applications.

i) micro a ( USB 1.1 to 2): Previously in mobiles, now discontinued. ii) micro b ( USB 1.1 to 2): All current mobiles/ laptops/ desktop PC. iii) micro b ( USB 3.0): External hard drive/latest smartphone/ laptops.

Important things to consider about USB wiring diagram of cables:

usb shielding 5 bare cable usb ID pinout

  • Check that if you are USB cord has more than 4 wires then 5th one must be a bare/ open conductor. This open wire is generally surrounded to the four main wire from around. This arrangement is called as shielding .
  • To prevent external noise shielding is necessary. The most common practice is to ground shielding with the host and external device.
  • Shielding is generally avoided in low quality cheaply made USB cables, which is not in the favor of good quality USB cords. It is very important for the protection of data. Also for avoiding loss of data and hardware faults.

USB color code:

usb color code

Very few people know that the USB connector has a color code. This color code is given to the USB on the basis of its standards defined by its organization. The colors are white, black, blue, red/ yellow.

White : It was introduced in 1996 (now outdated). It has a very low speed. The version it came from is USB 1.XX.

Black : It was in the market since the year 2000. It’s under version USB 2.XX. Its speed is up to 480 Mbps.

Blue : It published under the version USB 3.XX in 2008. Its maximum speed is 5 Gbps.

Red/Yellow : It is very same as USB3.XX with an upgraded feature of “sleep and charge”. This means that your device with this feature will not stop power supply even if the host device is turned off. This is very helpful for charging the mobile phone according to our convenience.

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Usb-c (type-c) pinout.

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USB type-c details

Developed at roughly the same time as the USB 3.1 specification, but distinct from it, the USB Type-C Specification 1.0 defines a new small reversible-plug connector for USB devices. The Type-C plug connects to both hosts and devices, replacing various Type-B and Type-A connectors and cables with a standard meant to be future-proof, similar to  Apple Lightning and Thunderbolt . The 24-pin double-sided connector provides four power/ground pairs, two differential pairs for USB 2.0 data bus (though only one pair is implemented in a Type-C cable), four pairs for high-speed data bus, two sideband use pins, and two configuration pins for cable orientation detection, dedicated biphase mark code (BMC) configuration data channel, and VCONN +5 V power for active cables. Type-A and Type-B adaptors and cables will be required for older devices in order to plug into Type-C hosts; adaptors and cables with a Type-C receptacle are not allowed.

USB type-C pinout

Pins A2,A3,A10,A11,B2,B3,B10,B11 are not used with USB 2.0-only devices.

User uploaded image:

usb pin assignments

See also USB type C full-featured cable.

usb pin assignments

  • USB-C (type-C) full-featured cable pinout
  • USB-C (Type-C) to USB-A charge/data cable pinout
  • USB-C to micro-USB 2.0 cable pinout
  • USB-C to USB 3.2 cable pinout

USB-C (Type-C) diagram

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Micro USB Pinout Explained

USB cables come with one of five different basic types of USB connector: A, B, mini B, micro B, and C. The micro connector comes standard on most non-Apple mobile phones and many other portables, though USB-C connectors are slowly replacing them in the newest generation of devices.

The USB Standard

The standard micro connector is available only up to the second-generation USB standard, though a less common and much wider 3.0 version exists. The 3.0 version offers:

- Better transfer rates than 2.0, but it’s less practical than the smaller and faster USB-C connector.

- Receptacles that can accept older generation cables, but older receptacles cannot accept 3.0 cables.

The standard micro connector has five pins in its older generations and ten pins in the less common 3.0 generation:

usb pin assignments

What is USB OTG?

The fourth pin (mode detect) is also commonly referred to as USB “On-the-Go” or simply “OTG.” This pin allows devices to switch between host and peripheral roles. In a smartphone, for instance, the USB connection might allow the phone to perform as a mass storage device when connected to a computer, but as a host to read data from removable storage. This OTG pin is also what allows devices to “decide” which will draw power from the other – typically the host will supply power to the peripheral, though in some cases the roles may be re-negotiated.

Micro USB Pinout Diagrams

Looking at the micro connector on a cable, all generations have pins numbered 1-4, ascending, from left to right on the main trapezoid. Third generation connectors have pins 6-10, ascending, from left to right, on the added side rectangle. You’ll find shielded wires on these connectors, and the data wires (positive and negative) are twisted pairs requiring no termination.

usb pin assignments

Fig 1: USB A and USB Micro B pinout

usb pin assignments

Fig 2: USB 3.0 Micro B pinout

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usb pin assignments

MCP2200 - USB 2.0 to UART Protocol Converter with GPIO


[Click the image to enlarge it]

The MCP2200 is a USB -to- UART serial converter chip developed by Microchip Technology. We can use MCP2200 to convert a USB connection to a serial interface. It supports 12mb/s speed and can send and receive 64 bytes. Unlike other USB to UART converters, MCP2200 has 8 general purpose I/O pins. Four of the pins have alternate functions to indicate USB and communication status. Only a few components are needed for the proper working of this IC. The integrated termination resistors in the MCP2200 make it a more convenient and cost-effective solution for adding USB connectivity to your UART-based devices. The MCP2200 also has 256 bytes of integrated user EEPROM. This IC is available in 20-lead VQFN (5x5 mm), 20-lead SOIC and 20-lead SSOP packages.

MCP2200 Pinout Configuration

Here are the pinout details for MCP2200. 

Features of MCP2200

MCP2200 USB to Serial converter has the following key features:

  • Supports Full-Speed USB (12 Mb/s)
  • Class 02h - CDC: USB-to-UART communications and I/O control
  • Class 03h - HID: I/O control, EEPROM access, and initial configuration
  • 64 byte transmit
  • 64 byte receive
  • Fully configurable VID and PID assignments, and string descriptors
  • Bus Powered or self powered USB Driver and Software Support
  • Windows XP(SP2 and later)/Vista/7
  • Configuration utility for initial configuration
  • Support baud rates: 300 - 1000k (baud)
  • Hardware flow control
  • UART signal polarity option General Purpose Input/Output (GPIO) Pins
  • Eight (8) general purpose I/O pins
  • 256 bytes of user EEPROM
  • USB activity LED outputs (TxLED and RxLED)
  • SSPND output pin
  • ULOAD output pin (indicates if requested current was allowed)
  • Operating voltage: 3.0 - 5.5 (V)
  • Oscillator input: 12 MHz
  • ESD protection > 4kV HBM
  • Industrial (I) Operating Temperature: -40°C to +85°C

Manufacturers of MCP2200:

The MCP2200 is manufactured by Microchip Technologies . There are no alternative manufacturers for the same part number as of the date of writing this article.

MCP2200 Variants and Identification

The MCP 2200 comes in 3 different packages VQFN, SOIC and SSOP. MCP2200- I/MQ and MCP2200T- I/MQ come in 20Pin QFN package, while MCP2200- I/SO and MCP2200T- I/SO come in SOIC package and MCP2200- I/SS and MCP2200T- I/SS come in SSOP packages.

MCP2200 Variants

MCP2200 Equivalents

If you are looking for an equivalent or replacement for MCP2200, we weren’t able to find any other chip that is pin-to-pin compatible.

MCP2200 Alternatives

If you are looking for an alternative for MCP2200 you can look at the other IC from these.

CH340 , MA112AS16 , FT230x , CP2102 , PL2303HX , CH9102 , CH343 , CH341 , CP2110, FT232

Note: Complete technical details can be found in the MCP2200 datasheet at this page’s end.

MCP2200 Schematics

The following image shows the typical circuit diagram for MCP2200 .

 MCP2200 Circuit Diagram

This circuit shows the basic configuration of the MCP2200 IC as you can see, we can connect the D+ and D- pins of the IC directly to the USB data pins. The capacitors connected across the power supply is to stabilise the voltage and reduce the noise. the reset pin is held high for normal operation with a 1K pull-up resistor (R6) and an internal 3.3volt regulator supplies the USB peripheral, it requires an external 470nF capacitor (C2). Here we used a 12Mhz crystal(Y1) and two 27pF capacitors (C3, C4) to provide the clock signal to MCP2200. This is necessary to provide a stable clock pulse to MCP2200 for proper working. We can connect the Tx and Rx lines of MCP2200 to any microcontroller or similar circuits. Remember to connect the Tx to the Rx of the receiver and the Rx to the Tx of the receiver.

Problems with using MCP2200?

I made a USB-to-serial converter using MCP2200 but I am unable to communicate?

It's due to several reasons but you can check these:

  • Double-check all connections between the MCP2200 chip and the other components of your circuit. Make sure that the TX and RX lines are connected correctly to the devices you are trying to communicate with.
  • Check that the voltage levels of the signals (TX, RX, etc.) are compatible with the devices you are connecting to. 
  • Sometimes, the issue could be with the USB cable itself. Try using a different USB cable to see if that resolves the problem.
  • Make sure you have selected the correct baud rate and other settings.

How can I test if my MCP2200 is working properly?

Make sure that the serial settings (baud rate) on your computer match those of the device you are trying to communicate with. Try connecting the TX and RX pins of the MCP2200 together (a loopback test). Send some data from your computer, and if it's received correctly, it indicates that the MCP2200 is working.

My computer is not recognizing the MCP2200 circuit.

  • Make sure that you have the correct drivers installed for the MCP2200 chip on your computer. The drivers are necessary for the computer to recognize and communicate with the chip.
  • In Windows, check the Device Manager to see if the MCP2200 is recognized correctly without any error messages. If there are errors, it could indicate a driver issue or a problem with the hardware connection.

Design choices to be considered with MCP2200

What are the design considerations when designing a PCB using MCP2200?

  • Place the USB port near the MCP2200 IC, and the data lines track should route straight forward. The D+ and D- signal lines are placed close to the parallel wiring, and ground or copper should be provided on both sides to reduce signal interference from the other parts.
  • Minimize the via count in data lines.
  • Should use filter capacitors and also keep all components tightly.

Applications of MCP2200

  • Microcontroller Programming
  • Debugging and Testing
  • Industrial Control Systems
  • DIY Electronics Projects
  • Legacy Device Support
  • Automation and Robotics

Footprint information and dimensions of MCP2200

Here you can find the mechanical drawings of MCP2200 along with its dimensions. The dimensions can be used to create custom footprints of the IC and be used for PCB or CAD modelling.

MCP2200 2D Model

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    The USB cable schematic diagram typically includes information about the pin assignments and functions of the four standard USB cable wires: VCC (power), D+ (data), D- (data), and GND (ground). These wires carry power and data signals between USB devices, enabling communication and charging. The schematic diagram also shows the wiring ...

  10. USB A Pinout

    Structure of USB A Pinout. The USB A pinout consists of four pins, each with a unique function: VCC (Pin 1): This is the power supply pin, providing a +5V voltage to the connected device. D- (Pin 2): This is the Data Minus pin, responsible for carrying data. D+ (Pin 3): This is the Data Plus pin, working together with Pin 2 for data transmission.

  11. Guide to USB-C Pinout and Features

    The USB Type-C has interesting features. It supports a blazing fast data transfer speed of up to 10 Gb/s and high power flow of up to 100 W. These along with a flippable connector can make the USB Type-C a truly universal standard for the modern devices. To see a complete list of my articles, please visit this page.

  12. USB wiring diagram- Micro USB pinout, 7+ Images

    Table of mini and micro USB pin-out type-b & type-a: The pin-out diagram for the micro USB type-B very similar to USB type-A except for the last two pins 4 and 5. Also, it is the same for micro USB type-a and micro USB type-b. The pin no.1 is +5V acts as a source to the device or source from the device.

  13. USB-C (Type-C) pinout diagram @ pinoutguide.com

    USB type-c details. Developed at roughly the same time as the USB 3.1 specification, but distinct from it, the USB Type-C Specification 1.0 defines a new small reversible-plug connector for USB devices. The Type-C plug connects to both hosts and devices, replacing various Type-B and Type-A connectors and cables with a standard meant to be future-proof, similar to Apple Lightning and Thunderbolt.

  14. USB Type B Connectors & Pinouts

    USB Type B Pinout. The Type B connector has four pins in its older generations and nine pins in standard 3.0: Looking at the Type B connector on a cable, the pins are numbered 1-4, ascending, clockwise from top left in the central rectangular portion of all generations. The third generation adds a row of pins above, numbered 9-5 descending from ...

  15. Micro USB Pinout

    Third generation connectors have pins 6-10, ascending, from left to right, on the added side rectangle. You'll find shielded wires on these connectors, and the data wires (positive and negative) are twisted pairs requiring no termination. Fig 1: USB A and USB Micro B pinout. Fig 2: USB 3.0 Micro B pinout. Article tags.

  16. USB TYPE-C Connector Pinout, Features, and Datasheet

    USB TYPE-C Connector. USB TYPE-C is a new port designed for high speed data exchange and high power deliver capability. The first thing to realize is that USB TYPE-C is not a new USB standard like USB1.0, USB2.0, USB3.0, and USB3.1. Those are protocols defining speed and other features, whereas USB TYPE-C is all about physical connection.

  17. Configuring Pin Assignments on USB Type-C Connecto ...

    The EZ-PD Configuration Utility makes use of the USB-Serial device to access the Type-C device. Double click on CypressDriverInstaller.exe to start the installation. a. Click Next to continue. b. Click "I agree" after reviewing the license terms. c. Click Install after selecting the destination folder. d.

  18. PDF USB Type-C and Power Delivery DisplayPort Alternate Mode

    Pin assignments E and F are used with USB Type-C to DisplayPort adapter plugs or receptacles. DisplayPort can use either two or four of the USB-C differential high speed lanes ML0, ML1, ML2 and ML3 for payload data transmission, and the DisplayPort AUX Channel is routed using the USB-C Sideband (SBU) signal

  19. FRONTX

    Diagram 1: On most motherboards, the USB header/pin-out consists of 9 pins arranged in 2 rows; and each header allows for 2 USB connections (i.e. USB1 and USB2). Normally, the pins for USB1 and USB2 are in seperate rows. Diagram 2: Simply plug the connector onto the header, in such that; the wires are correctly connected to the appropriate pins ...

  20. MCP2200 USB-to-UART Serial Converter: Features, Pinout, and

    MCP2200 Pinout. The MCP2200 is a USB -to- UART serial converter chip developed by Microchip Technology. We can use MCP2200 to convert a USB connection to a serial interface. It supports 12mb/s speed and can send and receive 64 bytes. Unlike other USB to UART converters, MCP2200 has 8 general purpose I/O pins.

  21. Pin assignments

    The pin assignment figures and tables describe the pinouts for the product variants of the chip. The nRF52840 device provides flexibility regarding GPIO pin routing and configuration. However, some pins have limitations or recommendations for pin configurations and uses. ... USB 3.3 V regulator supply decoupling ...