online smt footprint database

[mikegw]

Short of trolling through supplier data sheets does anyone know of a good
online database for surface mount footprints, particularly low leg count
such as resistors and transistors? I am heading down the SMT path and my
cad program is kinda light on footprints.

Cheers

Mike

 

[David L. Jones]

mikegw wrote:

Short of trolling through supplier data sheets does anyone know of a
good
online database for surface mount footprints, particularly low leg
count
such as resistors and transistors? I am heading down the SMT path
and my
cad program is kinda light on footprints.

Cheers

Mike

Which PCB package are you using?, any half decent PCB package should
come with at least all the basic SMD footprints.
Are you looking at hand soldering or proper reflow machine soldering?,
as this may dictate what footprint you use.
As a general rule you should follow the component manufacturers
recommendation. If the boards are to be machine soldered then the
assembler may have their own unique requirements as well.
The IPC standard SM-782 has generic footprint recommendations for most
surface mount parts, although these standards are not often suitable
for many applications, depends on the application.

Dave

 

[TheRealAndy]

"David L. Jones" <tronnort@yahoo.com> wrote in message
news:cfv1eo$vqs@odah37.prod.google.com...

mikegw wrote:
Short of trolling through supplier data sheets does anyone know of a
good
online database for surface mount footprints, particularly low leg
count
such as resistors and transistors? I am heading down the SMT path
and my
cad program is kinda light on footprints.

Cheers

Mike

Which PCB package are you using?, any half decent PCB package should
come with at least all the basic SMD footprints.
Are you looking at hand soldering or proper reflow machine soldering?,
as this may dictate what footprint you use.
As a general rule you should follow the component manufacturers
recommendation. If the boards are to be machine soldered then the
assembler may have their own unique requirements as well.
The IPC standard SM-782 has generic footprint recommendations for most
surface mount parts, although these standards are not often suitable
for many applications, depends on the application.

Dave

Dont use any of the supplied foorprints. Create your own based on the
manufacturers spec. This is the only sure method of getting it right.

 

[Glenn Garrett]

mikegw wrote:

Short of trolling through supplier data sheets does anyone know of a good
online database for surface mount footprints, particularly low leg count
such as resistors and transistors? I am heading down the SMT path and my
cad program is kinda light on footprints.

Cheers

Mike

http://www.pcblibraries.com/
IPC-7351 SMD Land Pattern Calculator V3.8

Excel spreadsheet freeware three tier calculator for all types of SMD
Put in the component dimensions, read off the footprint dimensions,
construct in your PCB library editor.

You need to register
Link is named 'IPC-7351 LandCalc'

Regards
Glenn

 

[mikegw]

Dave wrote...

Which PCB package are you using?, any half decent PCB package should
come with at least all the basic SMD footprints.

I am using AUTOTRAX (the non protel one) it is a work in progress but I like
it.

Are you looking at hand soldering or proper reflow machine soldering?,
as this may dictate what footprint you use.
As a general rule you should follow the component manufacturers
recommendation.

Hand soldering, I have never touched SMD stuff before but I thought I had
just best leap in. As Autotrax is light on footprints (and to be honest the
supplied footprints are a bit econimical on copper for my liking) I am in
the process of making up my own library (for better or worse).

Mike

 

[Steve]

"mikegw" <mikegw20@hotmail.spammers.must.die.com> wrote in message news:cfut9p$giq$1@tomahawk.unsw.edu.au...

Short of trolling through supplier data sheets does anyone know of a good
online database for surface mount footprints, particularly low leg count
such as resistors and transistors? I am heading down the SMT path and my
cad program is kinda light on footprints.

Cheers
Mike

For anyone using Autotrax (the Protel one you can have
my library for the cost of telling me who you are by email,
through a sort of a sign up agreement on the website.
The library has a reasonably good selection of SMT based
on IPC SM-782, with all the pad dimensions (etc) on the
webpage at:

http://www.airborn.com.au/layout/autolib1.html

Regards
Steve
www.airborn.com.au