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What is backplane in 7106 7-segment driver IC ?

Discussion in 'Electronic Basics' started by Guest, Jul 16, 2003.

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  1. Guest

    Guest Guest


    I don't understand what is the meaning of pin 21 of the 7106 7-seg
    display driver IC. The Maplin picture says "backplane" , what does it
    mean. Can I use this chip as a voltmeter at all, and which one should
    I choose ? I understand that the 7106 has easier power supply
    requirement since it doesn't need a -5V supply as the 7107 does, but
    are there any other consideration ?
  2. Hi,

    You should connect pin 21 to the backplane pin of the LCD.

    The main difference between the 7106 and the 7107 is that the 7106 is meant
    for driving LCDs, while the 7107 can directly drive an LED display.


    Gert van den Heuvel
  3. Guest

    Guest Guest

    I need to drive three 7-segments led displays, which do I use?
  4. Mark Zenier

    Mark Zenier Guest

    The Maxim MAX138, it's a 7107 with a built in negative voltage
    generator. Or maybe it's the MAX139 or MAX140. They're all on
    one datasheet.

    Mark Zenier Washington State resident
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