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LVPECL to PECL to LVPECL

Discussion in 'Electronic Design' started by Rene Tschaggelar, May 16, 2010.

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  1. The supply variety on ECL parts in general has ever
    been diminishing over the years, the variety is not
    even continuous. I should now connect an FPGA to a
    bunch of ECLs. The LVDS to LVPECL translation can be
    done with a 65LVDS100. Further I can only find a few
    ECL parts and finally I should connect to LVPECL
    again. I consider now lowering the Vcc for the PECL
    to 3.3V and set the associated GND to -1.9V for a blunt
    signal connection. The signals of (LV)ECL in general
    are referenced to the respective Vcc, so this should
    be doable.

    FPGA-LVDS -> 65LVDS100(3.3V,0V) -> PECL (+3.3V,-1.9V) -> LVPECL(3.3V,0V)

    Differential signal may have less problems than single
    ended in this configuration, I guess. A one point I'll
    have to go single ended though.


    Rene
     
  2. Andrew Holme

    Andrew Holme Guest

    MAX9375 is another option for LVDS to LVPECL
     
  3. Andrew Holme

    Andrew Holme Guest

    Not made in quantity, discontinued or not easy to buy through distribution?
    I got samples from Maxim quite recently.
     
  4. Guest

    They're Maxim. That's enough.
    Tell us how it works out for you when they can't (or won't) deliver real
    product. I think we have two Max parts designed in our products. They'll be
    gone the next time I touch the boards. I've had to train the disties not to
    use the 'M' word. ;-)
     
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