5/1/2023 0 Comments Usb connector typesThis is done on purpose to first connect the power supply when connecting a USB device, and only afterwards establish the data connection. If you look carefully at the connector you will see that the pins for the power connection (pin 1 and 4) are slightly longer. Two pins are used for power and two pins are used for differential data transmission. ![]() In the standard USB A and B connectors specified in the USB 1.1 and USB 2.0 specification, four pins are defined. Standard A and B USB connectorsīecause of all these reasons, two USB connectors have been defined for basic use, the USB A connector which must be used on devices which provide power (mostly computers), and the USB B connector used on devices which receive power like most peripheral devices. As USB can power devices over the cable it is not only necessary that an USB connector can not be connected in the wrong orientation, but the design must also not allow that two power providing USB devices are connected with each other as this may cause one or both power supplies to be damaged. This is something which can happen for example with flat cable connectors and power connectors inside computers. People who have often disconnected and reconnected their VGA cable might have experienced that these densely populated connectors have very thin pins which bend easily.Īnother problem with bad connector design is that you may accidentally connect them wrong. The DB9 and DB25 connectors which are used for RS232 ports and parallel ports on computers often have problems with connection bolts falling out of the computer case if someone has accidentally tightened the screws of the connector to far. The old Centronics connectors for parallel printers were bulky and needed clips to connect them securely to the devices. ![]() Much effort has been put in the design of the several USB connectors to make them useful for their purpose. This document contains information about all known USB connector types and will help you to find the right cable to connect equipment to your computer. ![]() This is because especially for smaller equipment like cameras different models of USB connectors have been defined. Although the USB interface itself is standard, and you should be able to connect every device to a USB enabled computer if the appropriate driver exists, problems may arise to find the right cable. The USB interface is one of the most used interfaces at this moment to connect peripheral equipment to computers.
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