The USB B type connector is almost square in shape, but it has slightly bevel on the corners on the top ends of the connector. This had slightly different pinout arrangement. Notice the blue insert on the connector that generally indicates USB 3 USB type B connector outlinesĪ second connector type known as the Type B was often used for smaller peripherals. USB 2.0 Type A and USB 1.1 Type A connectors are often black, but this is not always the case.
USB 3.0 Type A connectors are often, but not always, the coloured blue - look for the plastic lip within the connector itself. There is some colour coding on these connectors in terms of their capabilities. computer, etc, whereas the male will be seen on items like flash memories, mouse connector, keyboard connector, etc. The female connector or receptacle is the type found on the host, e.g. What might be referred to as the socket, is the female connector or receptacle, although it is often referred to as the port. The USB Type A plug is the male version of the connector.
The USB A connector is flat and rectangular and larger than other types, and t is held in place purely by friction and this makes it very easy to connect and disconnect, although not good if it is likely to be used in an environment where the equipment will be subject to vibration. The USB-Type A connector is used for "downstream" connections as it is intended for use on host controllers and hubs. It is found on host controllers and computers as well as on memory sticks and a host of other items. The USB A Type connector is the format that is probably most familiar. The table below helps give an overview of the various types and formats. Types A and B have 4 pins within the connector, Mini and Micro A and B connectors generally have five pins. Later the USB C Type was introduced to provide a more robust system with better data transfer performance.Īs a result there are many USB connector types: USB Type A, USB Type B, Mini-A, Mini-B, Micro-A, Micro-B and Micro-AB. In the original system, it was designed so that a USB cable could have one of two forms: and these are designated as "A" and "B" connectors. Data transfer speeds have risen, and the requirement for smaller connectors has increased. USB connector typesĪs the concept of USB has developed, so too have the connectors. Do not be tempted to connect computers in this way. This type of A to A cable is not intended to connect two computers together or to connect a USB hub between two computers, especially because both computers would provide 5V to the power lines on the cables and this could result in both power supplies being connected together, and other issues.Ĭonnecting them may cause irreparable damage to the computers and may even present a fire hazard.
USB CONNECTOR PC
Note: Although they are not particularly common, USB A to USB A cables can sometimes been seen for use to connect USB devices with an A-style Female port to a PC or another USB device for data transfer between the two computer systems. This ensures that they can only be connected in the required direction, thereby eliminating the possibility of issues such as illegal loopback connections at hubs like downstream ports being connected to another downstream port. To prevent mis-connection, upstream and downstream connectors are not mechanically interchangeable. In turn hosts have downstream connections to remote devices. To achieve this, USB remote devices have what is termed an upstream connection to a host. It is important to ensure that USB connections are made correctly and are able to follow the required protocols. Like all connectors, those used for USB have male and female versions to ensure that devices are mated in the correct direction. As USB has developed, new connectors have been introduced, generally reducing the connector size.Īpart from the connectors that are standardised, the cable lengths are also defined: the maximum allowable length for an individual cable is 5 metres (3 metres for slow devices) and this allows the USB data acquisition module to be located remotely from the computer. There are a number of different types of USB connector that are used on different types of equipment and in different situations.
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