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ECL termination

Discussion in 'Electronic Design' started by [email protected], Aug 23, 2005.

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  1. Guest

    I want to Make a board that splits ECL signals into two. I want to use
    MC10EL11:5V ECL 1:2 Differential Fanout Buffer. Reading the datasheet,
    I got confused.
    I usually use 100ohm resistors across ECL signals before they go into
    some receiving device. But I am not sure if these chips (MC10EL11) need
    such resistors before their inputs. Also, do they need resistors after
    their outputs and before they leave the board? Any help will be
    appreciated.
     
  2. ECL termination can be 470 Ohms into -5.2V, or 50 Ohms
    into -2V for single signals. You're routing diferential
    signals ? There is an appnote on Onsemi about ECL
    termination, AND8020D, recommended.

    Rene
     
  3. Guest

    Thank you for your response. Yes, I am routing differential signals.
    Let me make sure that I understand correctly. So, I will need a 100ohm
    resistor between input signals, D and D-bar. I will also need 470ohm
    resistor between each output to Vee.
     
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