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Do all types of USB have the same functionality?

341 Views 5 Replies Latest reply: Jun 27, 2013 5:45 PM by MartinR RSS
jason.hartfield Calculating status...
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Jun 27, 2013 9:40 AM

Do all types of USB have the same functionality (Type A, B, Mini-B, Micro-AB, Micro-B)?

  • MartinR Level 6 Level 6 (14,560 points)

    They are just different size/shape connectors - they all have the same functionality.

  • ComputerFixer Level 3 Level 3 (720 points)
    Currently Being Moderated
    Jun 27, 2013 10:11 AM (in response to MartinR)

    Actually, not necessarily.   All USB of the same type, have the same functionality.   For instance, a cable plugged into USB 2.0, whether that be USB 2.0 A, USB 2.0 B, USB Micro, USB Mini, or USB to USB, will all function the same way, at a maximum speed of 480Mbit/s (which translates to a transfer speed of 35mb/s)

     

    HOWEVER, in a USB 3.0 system, whether that be USB 3.0 A, USB 3.0 B, USB3 Micro, USB3 Mini, or USB3 to USB3, you have a maximum transfer speed of 3.2Gbit/s (or a realized transfer speed of 400mb/s)

     

    So all types of CONNECTORS work the same way when plugged into the same port, but USB 2 and USB 3 are totally different, especially sicne USB2 has 4 pins, and USB3 has 9 pins.

  • ComputerFixer Level 3 Level 3 (720 points)

    As to your follow-up question, yes, all HDMI connectors are the same. There is only one kind of HDMI connector.

  • MartinR Level 6 Level 6 (14,560 points)

    Well, OP asked about the connectors, so the answer was good as is.

     

    I would expand on your reply even more ...

     

    USB3 & USB2 are not totally different, and USB 3 is backward compatible with USB 2 & USB 1.  So even if you connect a USB3 drive to a USB2 or 1 port, regardless of connector type, it will still work, although it will be limited to the slower data transfer speeds of USB2 or 1. 

     

    The 9-pin USB3 standard connectors can be used with the 4-line USB2 & 1 ports.    The extra 5 lines in the USB3 connectors are configured in such a way as to preserve the backward compatibility with USB2 & 1.  The extra lines are what enable the faster data transfer speed & bandwidth in a totally USB3 connection.

     

    Also, the nominal USB speeds that all the manufacturers quote are laboratory based burst speeds, not sustained data transfer speeds.

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