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The female connector (receptacle) is typically embedded into a device while the male connector (plug) is generally free-hanging so it can be placed on the end of a cable assembly for two or more devices to be interconnected at a time.
With so many devices that use USB, it's easy to get confused by the different connectors. But fear not—we're going to demystify all of that today. When it comes to USB, there are really only four things that matter: form factor, transfer speeds, power delivery, and video delivery.
The USB device has only four pins that is why it’s really simple to wire up. Out of those four pins two (pin 1 and Pin 4) are used to provide power. And other two are used to transfer the data. A simple connection diagram of a USB device is shown below.
The USB port (also called a socket, jack or receptacle) is the part of the device that the USB connector plugs into. USB ports are sometimes referred to as “female”, as they accept a “male” connector. The different types of USB ports, for both the 2.0 and 3.0 versions, are listed in the table below:
Use the USB physical compatibility chart below to see which USB plug (male connector) is compatible with which USB receptacle (female connector). Some connectors changed from USB version to USB version, so be sure to use the correct one at either end.
The male USB connector - typically called the plug - is almost always found on the end of a cable, or sometimes physically attached to smaller accessories such as USB memory sticks. This inserts into the female port, usually located in the casing of a larger device.
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.