Re: gEDA-user: pcb footprint for 100-pin TQFP, with 0.65mm pitch?

2008-05-09 Thread Ben Jackson
On Fri, May 09, 2008 at 03:43:18PM +0200, Stefan Salewski wrote: > Hello, > > I need a 100-pin TQFP footprint with 0.65mm pitch: > > 100-Pin Thin Plastic Quad Flat pack (14 x 20 x 1.4 mm) (51-85050) Perhaps the attached will be of use. I built a board using this symbol and package and it works.

Re: gEDA-user: pcb footprint for 100-pin TQFP, with 0.65mm pitch?

2008-05-09 Thread Dave N6NZ
DJ Delorie wrote: > > Then when you get the chip, print the land pattern on paper and put > the chip on it to make sure it all fits. This step is FAR more > important than relying on math and spec sheets. Especially if the spec sheet comes from Freescale -- their tech writers seem to like to i

Re: gEDA-user: pcb footprint for 100-pin TQFP, with 0.65mm pitch?

2008-05-09 Thread Rick Collins
I haven't looked in the library, but this part should be there. Instead of looking for a TQFP, look for a QFP or a PQFP. This is an old footprint and should be very common. If all else fails, you can download a footprint dimension library from PCB Libraries at http://www.pcblibraries.com/. T

Re: gEDA-user: pcb footprint for 100-pin TQFP, with 0.65mm pitch?

2008-05-09 Thread DJ Delorie
> http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cy7c1380d_8.pdf > > is the exact dimension of land pattern not given, and I was not able > to find it somewhere else. So my home made footprint will only be an > approximation. The specs on page 27 are enough to mak

gEDA-user: pcb footprint for 100-pin TQFP, with 0.65mm pitch?

2008-05-09 Thread Stefan Salewski
Hello, I need a 100-pin TQFP footprint with 0.65mm pitch: 100-Pin Thin Plastic Quad Flat pack (14 x 20 x 1.4 mm) (51-85050) In datasheet http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cy7c1380d_8.pdf is the exact dimension of land pattern not given, and I was no