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Very first steps with Cadence PCB Editor/Design Entry HDL

First Layout

Hello,

 I'm starting with my first layout (master thesis: rf frontend) in Cadence SPB 15.7 and have a lot of questions. Here are some of them:

 1.) Before I start with the schematic, I think I have to create the schematic-symbols and the footprints of the ICs. I already followed a tutorial which showed how to make the padstacks and the footprints with assembly outline, silkscreen outline, package boundary. I startet with an easy footprint of the MAX4447 with SOIC 16 pins. But I have no tutorial which explains how to create the schematic-symbol and how to link it with my new footprint. Any idea where to find one?

2.)  The next parts, I have to create are TSSOP20, SOT-89, QFN-LP3, 20pin MCM, 56TQFN, SOT3, SOT-666, QFN-6.

It's a lot of work and I don't know if everything I do is correct. So are there downloadable footprint packages which contain some of my needed footprints? I think I have to compare every downloaded footprint with the datasheet of the part but it would speed up my work a lot.

3.) Any other hints? =)

 regards,

First_Layout

 

  • Khurram
    If you tell me which schematic software you are using with allegro then I could explain how to link schematic symbol with footprint, meanwhile I am attaching you a utility which have approximately 3000 footprint, it also include all necessary pad stacks/shapes/flashes/devices files. I have found this utility on internet. I have never used it professionally as we have lots of standard associated with footprint, may be it will be helpful to you. If you have any question regarding it, you can ask me and give me your feedback on it.

    Thanks
    Khurram
  • Khurram

    Sorry i forget to attached the utility, here it is .......

    FPM_0.080.zip
  • First Layout

     Thank you for the link, I downloaded the tool a few minutes before your post and I think it will help me a lot. 

     I have Cadence SPB 15.7 with "Design Entry HDL". When I start "Design Entry HDL" I have the choice between:

    "Allegro Design Entry HDL L"

    "Allegro PCB Design HDL L"

    "Allegro PCB Design HDL XL (PCB Design Expert)"

    "ConceptHDL (legacy)"

  • Khurram
    HI
     
    Go to part developer >>> open library >>> edit  >> add schematic symbol >> add footprint(dra) name in JDEC_TYPE. Save the library. This way you can add footprint in symbol.
     
    Regards
    Khurram
  • redwire

     Who would start a master's thesis on an expired toolset?  What university are you at?  What is your thesis?

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