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Mail Archives: geda-user/2018/07/17/19:44:43

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From: John Doty <jpd AT noqsi DOT com>
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Subject: Re: [geda-user] How to define for an exposed pad to connect to 3
pins/pads
Date: Tue, 17 Jul 2018 19:43:32 -0400
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To: "Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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> On Jul 17, 2018, at 3:53 PM, Rob Butts (r DOT butts2 AT gmail DOT com) [via =
geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>=20
> So now I have an 8 pin mosfet where the D is pins 5 - 8.  The =
component has an exposed pad that goes across the pins 5 - 8.  How can I =
do the symbol net=3D"netname":"pin" so that pins 5-8 and the exposed pad =
(pin 9) are all connected?

For this case, net=3D attributes are clumsy. One way is to draw a symbol =
with as many pins as needed, and then move the pins that need to go to =
the same net to the same place, with their connection ends at the same =
point. This =E2=80=9Cshorts=E2=80=9D them together automatically. =
Here=E2=80=99s a symbol for a MOSFET in an 18 pin package:


John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com



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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jul 17, 2018, at 3:53 PM, Rob Butts (<a =
href=3D"mailto:r DOT butts2 AT gmail DOT com" class=3D"">r DOT butts2 AT gmail DOT com</a>) =
[via <a href=3D"mailto:geda-user AT delorie DOT com" =
class=3D"">geda-user AT delorie DOT com</a>] &lt;<a =
href=3D"mailto:geda-user AT delorie DOT com" =
class=3D"">geda-user AT delorie DOT com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D"">So now I have an 8 pin mosfet where the D is pins 5 - =
8.&nbsp; The component has an exposed pad that goes across the pins 5 - =
8.&nbsp; How can I do the symbol net=3D"netname":"pin" so that pins 5-8 =
and the exposed pad (pin 9) are all connected?<br =
class=3D""></div></div></blockquote><br class=3D""></div><div>For this =
case, net=3D attributes are clumsy. One way is to draw a symbol with as =
many pins as needed, and then move the pins that need to go to the same =
net to the same place, with their connection ends at the same point. =
This =E2=80=9Cshorts=E2=80=9D them together automatically. Here=E2=80=99s =
a symbol for a MOSFET in an 18 pin package:</div><div><br =
class=3D""></div><div></div></body></html>=

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v 20130925 2
T 600 500 5 10 0 0 0 0 1
device=NMOS_TRANSISTOR
T 600 500 5 10 0 0 0 0 1
numslots=0
T 600 500 5 10 0 0 0 0 1
description=generic N channel MOS transistor (enhancement type)
L 250 600 500 600 3 0 0 0 -1 -1
L 250 200 500 200 3 0 0 0 -1 -1
L 250 400 350 450 3 0 0 0 -1 -1
L 250 400 350 350 3 0 0 0 -1 -1
P 0 200 200 200 1 0 0
{
T 0 300 5 10 0 1 0 0 1
pinnumber=4
T 0 300 9 10 0 1 0 0 1
pinlabel=G
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pinseq=4
T 0 300 5 10 0 0 0 0 1
pintype=pas
}
P 500 600 500 800 1 0 1
{
T 300 700 5 10 0 1 0 0 1
pinnumber=15
T 300 700 9 10 0 1 0 0 1
pinlabel=D
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pinseq=15
T 300 700 5 10 0 0 0 0 1
pintype=pas
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P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=6
T 300 0 9 10 0 1 0 0 1
pinlabel=S
T 300 0 5 10 0 0 0 0 1
pinseq=6
T 300 0 5 10 0 0 0 0 1
pintype=pas
}
T 700 600 8 10 1 1 0 0 1
refdes=Q?
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L 250 475 250 325 3 0 0 0 -1 -1
L 250 275 250 125 3 0 0 0 -1 -1
L 200 600 200 200 3 0 0 0 -1 -1
L 250 400 400 400 3 0 0 0 -1 -1
L 400 400 400 200 3 0 0 0 -1 -1
T 200 1600 5 10 0 0 0 0 1
footprint=18LCC
T 200 1400 5 10 0 0 0 0 1
spice-prototype=X? #1 #4 #6 model-name@
T 200 1200 5 10 0 0 0 0 1
model-name=irfru220n
T 200 1000 5 10 0 0 0 0 1
value=IRFE220
P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=7
T 300 0 9 10 0 1 0 0 1
pinlabel=S
T 300 0 5 10 0 0 0 0 1
pinseq=7
T 300 0 5 10 0 0 0 0 1
pintype=pas
}
P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=8
T 300 0 9 10 0 1 0 0 1
pinlabel=S
T 300 0 5 10 0 0 0 0 1
pinseq=8
T 300 0 5 10 0 0 0 0 1
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P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=9
T 300 0 9 10 0 1 0 0 1
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P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=10
T 300 0 9 10 0 1 0 0 1
pinlabel=S
T 300 0 5 10 0 0 0 0 1
pinseq=10
T 300 0 5 10 0 0 0 0 1
pintype=pas
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P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=11
T 300 0 9 10 0 1 0 0 1
pinlabel=S
T 300 0 5 10 0 0 0 0 1
pinseq=11
T 300 0 5 10 0 0 0 0 1
pintype=pas
}
P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=12
T 300 0 9 10 0 1 0 0 1
pinlabel=S
T 300 0 5 10 0 0 0 0 1
pinseq=12
T 300 0 5 10 0 0 0 0 1
pintype=pas
}
P 500 200 500 0 1 0 1
{
T 300 0 5 10 0 1 0 0 1
pinnumber=13
T 300 0 9 10 0 1 0 0 1
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T 300 0 5 10 0 0 0 0 1
pinseq=13
T 300 0 5 10 0 0 0 0 1
pintype=pas
}
P 500 600 500 800 1 0 1
{
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pinnumber=16
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pinlabel=D
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pintype=pas
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{
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T 300 700 9 10 0 1 0 0 1
pinlabel=D
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P 500 600 500 800 1 0 1
{
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pinnumber=18
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pinlabel=D
T 300 700 5 10 0 0 0 0 1
pinseq=18
T 300 700 5 10 0 0 0 0 1
pintype=pas
}
P 500 600 500 800 1 0 1
{
T 300 700 5 10 0 1 0 0 1
pinnumber=1
T 300 700 9 10 0 1 0 0 1
pinlabel=D
T 300 700 5 10 0 0 0 0 1
pinseq=1
T 300 700 5 10 0 0 0 0 1
pintype=pas
}
P 500 600 500 800 1 0 1
{
T 300 700 5 10 0 1 0 0 1
pinnumber=2
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pinlabel=D
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pinseq=2
T 300 700 5 10 0 0 0 0 1
pintype=pas
}
P 0 200 200 200 1 0 0
{
T 0 300 5 10 0 1 0 0 1
pinnumber=5
T 0 300 9 10 0 1 0 0 1
pinlabel=G
T 0 300 5 10 0 0 0 0 1
pinseq=5
T 0 300 5 10 0 0 0 0 1
pintype=pas
}
T 200 2000 8 10 0 0 0 0 1
pins=18
T 200 1800 8 10 0 0 0 0 1
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style=3D"font: 12.0px Helvetica" class=3D"">John Doty<span =
class=3D"Apple-converted-space">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span><span =
class=3D"Apple-converted-tab">&nbsp; &nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span>Noqsi =
Aerospace, Ltd.</font></p><p style=3D"margin: 0.0px 0.0px 0.0px 0.0px" =
class=3D""><a href=3D"http://www.noqsi.com/" =
class=3D"">http://www.noqsi.com/</a></p><p style=3D"margin: 0.0px 0.0px =
0.0px 0.0px" class=3D""><font face=3D"Helvetica" size=3D"3" style=3D"font:=
 12.0px Helvetica" class=3D""><a href=3D"mailto:jpd AT noqsi DOT com" =
class=3D"">jpd AT noqsi DOT com</a></font></p><br =
class=3D"Apple-interchange-newline"></span></span>
</div>
<br class=3D""></body></html>=

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