Gopal,
I don't know what the difference is because I don't use canned
libraries. However I know that Protel used to have a paper that described their
naming conventions for footprints. I did a quick search and couldn't find it
for you but maybe you could look for it yourself on their website.
Other than that place the parts and compare them. I suspect you will
find differing pad sizes and or differing pin 1 locations.
Sincerely,
Brad Velander
Senior PCB Designer
Northern Airborne Technology
1925 Kirschner Rd.,
Kelowna, BC, V1Y 4N7.
tel (250) 763-2329 ext. 225
fax (250) 762-3374
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Gopalakrishnan
Narayanan
Sent: Tuesday, February 01, 2005 9:24 AM
To: [email protected]
Subject: [PEDA] 64 TQFP
Hello i have just started using protel99se and I got a
problem.I am making a pcb for atmega169 which says it
is 14mm*14mm 64 pin 1mm height etc.But when looking
for footprint protel has 3 types of 64pin TQFp with
QFP14*14-G64/N
QFP14*14-G64/N/Y1.9N
QFP14*14-G64/N/Y1.55N
can somebody explain the difference between them.
Thank you
Regards
Gopal
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