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| Sun, 28 Jun 2015 02:42:35 -0700 (PDT) | |
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| Date: | Sun, 28 Jun 2015 19:12:35 +0930 |
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| Subject: | Re: [geda-user] PCB footprint for rectangular QFN? |
| From: | "Erich Heinzle (a1039181 AT gmail DOT com)" <geda-user AT delorie DOT com> |
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--001a1137a7f6028e09051990cb12 Content-Type: text/plain; charset=UTF-8 Try this, I converted it from a kicad module using KicadModuleToGEDA I will put batch converting some QFN footprints and putting them on geda symbols on the to do list. You may need to fiddle with the pin names. It was converted from a kicad S-file format module and I think the naming in the source module is a bit hinky. The geometry is what matters/takes time though. Have fun. Cheers Erich. # Kicad module units: 0.1 mil # Footprint = module name: QFN-20-1EP_3x4mm_Pitch0.5mm # Text descriptor count: 1 # Draw segment object count: 11 # Draw circle object count: 0 # Draw arc object count: 0 # Pad count: 24 Element["" "REF " "" "" 0 0 0 -12795 0 100 ""] ( ElementLine[-7874 -9842 -7874 9842 196] ElementLine[7874 -9842 7874 9842 196] ElementLine[-7874 -9842 7874 -9842 196] ElementLine[-7874 9842 7874 9842 196] ElementLine[6397 -8366 6397 -6299 590] ElementLine[-6397 8366 -6397 6299 590] ElementLine[6397 8366 6397 6299 590] ElementLine[-6397 -8366 -4330 -8366 590] ElementLine[-6397 8366 -4330 8366 590] ElementLine[6397 8366 4330 8366 590] ElementLine[6397 -8366 4330 -8366 590] Pad[-6397 -4921 -4625 -4921 984 2000 1784 "GND" "1" "square"] Pad[-6397 -2952 -4625 -2952 984 2000 1784 "GND" "2" "square"] Pad[-6397 -984 -4625 -984 984 2000 1784 "GND" "3" "square"] Pad[-6397 984 -4625 984 984 2000 1784 "GND" "4" "square"] Pad[-6397 2952 -4625 2952 984 2000 1784 "GND" "5" "square"] Pad[-6397 4921 -4625 4921 984 2000 1784 "GND" "6" "square"] Pad[-2952 6594 -2952 8366 984 2000 1784 "GND" "7" "square"] Pad[-984 6594 -984 8366 984 2000 1784 "GND" "8" "square"] Pad[984 6594 984 8366 984 2000 1784 "GND" "9" "square"] Pad[2952 6594 2952 8366 984 2000 1784 "GND" "10" "square"] Pad[4625 4921 6397 4921 984 2000 1784 "GND" "11" "square"] Pad[4625 2952 6397 2952 984 2000 1784 "GND" "12" "square"] Pad[4625 984 6397 984 984 2000 1784 "GND" "13" "square"] Pad[4625 -984 6397 -984 984 2000 1784 "GND" "14" "square"] Pad[4625 -2952 6397 -2952 984 2000 1784 "GND" "15" "square"] Pad[4625 -4921 6397 -4921 984 2000 1784 "GND" "16" "square"] Pad[2952 -8366 2952 -6594 984 2000 1784 "GND" "17" "square"] Pad[984 -8366 984 -6594 984 2000 1784 "GND" "18" "square"] Pad[-984 -8366 -984 -6594 984 2000 1784 "GND" "19" "square"] Pad[-2952 -8366 -2952 -6594 984 2000 1784 "GND" "20" "square"] Pad[1624 1624 1624 3592 3248 2000 4048 "GND" "21" "square"] Pad[1624 -3592 1624 -1624 3248 2000 4048 "GND" "21" "square"] Pad[-1624 1624 -1624 3592 3248 2000 4048 "GND" "21" "square"] Pad[-1624 -3592 -1624 -1624 3248 2000 4048 "GND" "21" "square"] ) On Sun, Jun 28, 2015 at 3:16 PM, Dave McGuire (mcguire AT neurotica DOT com) < geda-user AT delorie DOT com> wrote: > > Hey folks! I'm thinking of using Linear Technology's LTC4099 chip > which comes in a rectangular 20-pad QFN, with four pads on two sides and > six pads on the other two. > > Has anyone done up a footprint for this somewhat unusual package? > > Thanks, > -Dave > > -- > Dave McGuire, AK4HZ > New Kensington, PA > --001a1137a7f6028e09051990cb12 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div><div>Try this,<br><br></div>I converted it from a kic= ad module using KicadModuleToGEDA<br><br></div>I will put batch converting = some QFN footprints and putting them on geda symbols on the to do list.<br>= <div><br></div><div>You may need to fiddle with the pin names. It was conve= rted from a kicad S-file format module and I think the naming in the source= module is a bit hinky. The geometry is what matters/takes time though. Hav= e fun.<br><br></div><div>Cheers<br></div><div>Erich.<br></div><div><br># Ki= cad module units: 0.1 mil<br># Footprint =3D module name: QFN-20-1EP_3x4mm_= Pitch0.5mm<br># Text descriptor count: 1<br># Draw segment object count: 11= <br># Draw circle object count: 0<br># Draw arc object count: 0<br># Pad co= unt: 24<br>Element["" "REF=C2=A0 " "" "&= quot; 0 0 0 -12795 0 100 ""]<br>(<br>ElementLine[-7874 -9842 -787= 4 9842 196]<br>ElementLine[7874 -9842 7874 9842 196]<br>ElementLine[-7874 -= 9842 7874 -9842 196]<br>ElementLine[-7874 9842 7874 9842 196]<br>ElementLin= e[6397 -8366 6397 -6299 590]<br>ElementLine[-6397 8366 -6397 6299 590]<br>E= lementLine[6397 8366 6397 6299 590]<br>ElementLine[-6397 -8366 -4330 -8366 = 590]<br>ElementLine[-6397 8366 -4330 8366 590]<br>ElementLine[6397 8366 433= 0 8366 590]<br>ElementLine[6397 -8366 4330 -8366 590]<br>Pad[-6397 -4921 -4= 625 -4921 984 2000 1784 "GND" "1" "square"]<b= r>Pad[-6397 -2952 -4625 -2952 984 2000 1784 "GND" "2" &= quot;square"]<br>Pad[-6397 -984 -4625 -984 984 2000 1784 "GND&quo= t; "3" "square"]<br>Pad[-6397 984 -4625 984 984 2000 17= 84 "GND" "4" "square"]<br>Pad[-6397 2952 -462= 5 2952 984 2000 1784 "GND" "5" "square"]<br>P= ad[-6397 4921 -4625 4921 984 2000 1784 "GND" "6" "= square"]<br>Pad[-2952 6594 -2952 8366 984 2000 1784 "GND" &q= uot;7" "square"]<br>Pad[-984 6594 -984 8366 984 2000 1784 &q= uot;GND" "8" "square"]<br>Pad[984 6594 984 8366 98= 4 2000 1784 "GND" "9" "square"]<br>Pad[2952 6= 594 2952 8366 984 2000 1784 "GND" "10" "square&quo= t;]<br>Pad[4625 4921 6397 4921 984 2000 1784 "GND" "11"= "square"]<br>Pad[4625 2952 6397 2952 984 2000 1784 "GND&quo= t; "12" "square"]<br>Pad[4625 984 6397 984 984 2000 178= 4 "GND" "13" "square"]<br>Pad[4625 -984 6397 = -984 984 2000 1784 "GND" "14" "square"]<br>Pa= d[4625 -2952 6397 -2952 984 2000 1784 "GND" "15" "= square"]<br>Pad[4625 -4921 6397 -4921 984 2000 1784 "GND" &q= uot;16" "square"]<br>Pad[2952 -8366 2952 -6594 984 2000 1784= "GND" "17" "square"]<br>Pad[984 -8366 984 -6= 594 984 2000 1784 "GND" "18" "square"]<br>Pad= [-984 -8366 -984 -6594 984 2000 1784 "GND" "19" "s= quare"]<br>Pad[-2952 -8366 -2952 -6594 984 2000 1784 "GND" &= quot;20" "square"]<br>Pad[1624 1624 1624 3592 3248 2000 4048= "GND" "21" "square"]<br>Pad[1624 -3592 1624 = -1624 3248 2000 4048 "GND" "21" "square"]<br>= Pad[-1624 1624 -1624 3592 3248 2000 4048 "GND" "21" &qu= ot;square"]<br>Pad[-1624 -3592 -1624 -1624 3248 2000 4048 "GND&qu= ot; "21" "square"]<br>)<br><br><br><br></div></div><div= class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sun, Jun 28, 2015 = at 3:16 PM, Dave McGuire (<a href=3D"mailto:mcguire AT neurotica DOT com">mcguire@= neurotica.com</a>) <span dir=3D"ltr"><<a href=3D"mailto:geda-user AT delori= e.com" target=3D"_blank">geda-user AT delorie DOT com</a>></span> wrote:<br><bl= ockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #= ccc solid;padding-left:1ex"><br> =C2=A0 Hey folks!=C2=A0 I'm thinking of using Linear Technology's L= TC4099 chip<br> which comes in a rectangular 20-pad QFN, with four pads on two sides and<br= > six pads on the other two.<br> <br> =C2=A0 Has anyone done up a footprint for this somewhat unusual package?<br= > <br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Thanks,<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 -Dave<br> <span class=3D"HOEnZb"><font color=3D"#888888"><br> --<br> Dave McGuire, AK4HZ<br> New Kensington, PA<br> </font></span></blockquote></div><br></div> --001a1137a7f6028e09051990cb12--
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