Skip navigation

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...
Currently Being Moderated
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.


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.