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


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.

Image

USB Pinout

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 2.0

Type A

Image

Pin Number Name Description Color
1 VBUS +5V Red or Orange
2 D– Data – White or Gold
3 D+ Data + Green
4 GND Ground Black or Blue

Type B

Image

Pin Number Name Description Color
1 VBUS +5V Red or Orange
2 D– Data – White or Gold
3 D+ Data + Green
4 GND Ground Black or Blue

Mini-A

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG (On-the-Go) Identification

Connected to Ground on Mini-A Port (Host)

No Wire
5 GND Ground Black

Mini-B

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG (On-the-Go) Identification

Not Connected on Mini-B Connector (Device)

No Wire
5 GND Ground Black

Micro-A

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG (On-the-Go) Identification

Connected to Ground on Type A Port (Host)

No Wire
5 GND Ground Black

Micro-B

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG (On-the-Go) Identification

Not Connected on Type B Connector (Device)

No Wire
5 GND Ground Black

Micro-AB

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG (On-the-Go) Identification

Connected to Ground on Type A Port (Host)

Not Connected on Type B Connector (Device)

No Wire
5 GND Ground Black

USB 3.0

Type A

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 GND Ground (Power Return) Black
5 StdA_SSRX– Super Speed Differential Pair for Receiving Blue
6 StdA_SSRX+ Yellow
7 GND_DRAIN Ground (Signal Return) None
8 StdA_SSTX– Super Speed Differential Pair for Transmitting Purple
9 StdA_SSTX+ Orange

Type B

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 GND Ground (Power Return) Black
5 StdA_SSTX– Super Speed Differential Pair for Receiving Blue
6 StdA_SSTX+ Yellow
7 GND_DRAIN Ground (Signal Return) None
8 StdA_SSRX– Super Speed Differential Pair for Transmitting Purple
9 StdA_SSRX+ Orange

Micro-A

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG Mode Detect Dark Blue
5 GND Ground (Power Return) Black
6 StdA_SSRX– Super Speed Differential Pair for Receiving Blue
7 StdA_SSRX+ Yellow
8 GND_DRAIN Ground (Signal Return) None
9 StdA_SSTX– Super Speed Differential Pair for Transmitting Purple
10 StdA_SSTX+ Orange

Micro-B

Image

Pin Number Name Description Color
1 VBUS +5V Red
2 D– Data – White
3 D+ Data + Green
4 ID OTG Mode Detect Dark Blue
5 GND Ground (Power Return) Black
6 StdA_SSTX– Super Speed Differential Pair for Receiving Blue
7 StdA_SSTX+ Yellow
8 GND_DRAIN Ground (Signal Return) None
9 StdA_SSRX– Super Speed Differential Pair for Transmitting Purple
10 StdA_SSRX+ Orange

USB Type C

Image

Pin Number Name Description Color
A1 GND Ground Return Tin Plated (Gray)
A2 SSTXP1 (TX1+) Super Speed Differential Pair #1 TX Positive Yellow
A3 SSTXN1 (TX1–) Super Speed Differential Pair #1 TX Negative Brown
A4 VBUS Bus Power Red
A5 CC1 Configuration Channel Blue
A6 DP1 USB 2.0 Data + Green
A7 DN1 USB 2.0 Data – White
A8 SBU1 Sideband Use Red
A9 VBUS Bus Power Red
A10 SSRXN2 (RX2–) Super Speed Differential Pair #4 RX Negative Blue
A11 SSRXP2 (RX2+) Super Speed Differential Pair #4 RX Positive Red
A12 GND Ground Return Tin Plated (Gray)
B1 GND Ground Return Tin Plated (Gray)
B2 SSTXP2 (TX2+) Super Speed Differential Pair #3 TX Positive White
B3 SSTXN2 (TX2–) Super Speed Differential Pair #3 TX Negative Black
B4 VBUS Bus Power Red
B5 CC2 Configuration Channel Yellow
B6 DP2 USB 2.0 Data + Green
B7 DN2 USB 2.0 Data – White
B8 SBU2 Sideband Use Black
B9 VBUS Bus Power Red
B10 SSRXN1 (RX1–) Super Speed Differential Pair #2 RX Negative Orange
B11 SSRXP1 (RX1+) Super Speed Differential Pair #2 RX Negative Green
B12 GND Ground Return Tin Plated (Gray)

Conclusion

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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