-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 >> There are named "land patterns" on maxim's website: >> http://www.maxim-ic.com/design/packaging/index.mvp?a=2&f= > > Yes, there are both land patterns and package outlines, > but there's an awful lot of them to go through ... > I know what you mean. I have a hard time navigating that maze. Still, for TDFN, there aren't that many. I'd be glad to harvest some information.
>>>> There's one thing that puzzles me - the Maxim datasheet lists two >>>> versions of the package for N=8 and three each for N=10 and 14, >>>> but unless I'm blind, all variants have identical dimensions ? >>> >> There are a few duplicates, but there are some 3x3mm TDFN packages and >> some 2x2mm packages. > > I've looked at some of the datasheets above, and I think the datasheet > http://pdfserv.maxim-ic.com/package_dwgs/21-0137.PDF is wrong > - the difference between the variants seems to be the size of > the exposed pad (D2,E2), but 21-0137.PDF lists them as identical. > I'm not sure what you mean. http://pdfserv.maxim-ic.com/package_dwgs/21-0137.PDF lists the size of the exposed pad as identical for variations of the same N. For N=14 D2 is 1.7mm instead of 1.5mm. >> I think there are also larger packages as well; > > Yes, much larger - up to 56 "pins" :-) > AFAIK, TDFN only goes to 14 pins. TQFN on the other hand, does go to 56. I think you're referring to TQFN. I'll look over the .dim and see if I can get some dimensions in (If I can't then I should probably try to fly to save the world from an idiot mind :p ). >> What do you want to do about the molex connectors? If I had the >> generator script, I could play around with it and see if I can get some >> work done on the connectors. It could also be of great help if we could >> convert IGES to VRML automatically. Worst case, I'd have to manually do >> it for 100+ connectors > > I've taken a quick look at the IGES file format, and > it's fortunately not binary, but (sort of) human readable > ASCII (in good ol' punched-card 80-colums fixed format :-) > > There's a Wiki page on IGES: http://en.wikipedia.org/wiki/IGES, > but it doesn't go into enough detail to be _really_ > useful (some of the info is there, but not all). > There are a few PDF files listed under "References" on the wikipedia page, which seem to deal with the standard. But at multi-hundred pages long, they shouldn't be read by anyone. I'll keep an eye out for a *readable* spec. > I haven't understood what all the numbers and fields means yet, but > as freecad can read IGES (*), the freecad source should also contain > some useful info for writing a script to convert IGES to VRML. > > (*): Well, sort of - freecad is definitely alpha code: > I've tried feeding the simple example on the Wiki to freecad, > and it gets the coloring wrong - the points, arcs and lines > should be yellow, red and green, but they're all shown in black. > Also, Wiki Ref 6: http://www.wiz-worx.com/iges5x/wysiwyg/f214x.shtml > is totally wrong (most of it is missing). > Fortunately, the missing stuff is 2D graphics, and the Molex > connectors shows up just fine (except for the coloring). > Hmm, I just noticed that IGES contains color information. If it's any consolation, not even Inventor can get the color right (well, except for the yellow lines). > As KiCad only understands VRML IndexedFaceSet and materials, > any 1D and 2D info (points, lines, arcs, etc.) in an IGES > file will get lost - only the 3D faces can be converted. > However, that should be enough for kicad, I think. > Yes, the 3D faces are all that's needed in kicad. I'm not sure how the pieces are supposed to be colored; Inventor displays the body and pins as one piece, in one color. Worst case scenario, there's also the possibility of converting PRO/E or STEP files, as molex provides all three variations (though I think STEP is binary). Alex -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJMdntNAAoJEOYeVCFxnjTcEawIAMH22QUluLvaKYeIgPEfK3Ro YtXNoycAujOLe1cEtgpsI92sLZzcip7tneakjwx0CvxgJS3Iucfm4Hm2voCfgP2d ApEw2LaZfm0gW3xxAd7sRhyisnRjUaqG7ZEwMPHfl+cHeYkI26+tv4nE+UqWETnd oGnr6JjShmK/N7V0x9jBjFzdQTDrbrsNg64yknl+saaBmBimd83jY0EKHbKrsLCL uqzyZ5Ol3Vcig+fXS2beUJmGNhfqlrWxtkaEhS1tS0H1VVPtDrNhRlNtMSGkzNvX EuKMAnALAWVzTmuBPLe5QO/sV1wUo4HrHit7ng/xMmj9xziOn8fXgI7WjyOc7CE= =E/QF -----END PGP SIGNATURE----- _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
