Is there a scale drawing of SMD package sizes as a design aid? This could be useful in schematic/layout stages of a project in when deciding to trade off size vs. cost.

  • \$\begingroup\$ Below answer is how I'd normally do it just be dropping onto a PCB layout, but I found a chart at chibi-sakura.org/images/smd_chart_v01.png that may be useful although it doesn't cover a great range of footprints. \$\endgroup\$ – PeterJ Jan 24 '13 at 2:43

TI has a nice pdf chart for their ic packages, at actual size. Organized by pin count and package type. This is Texas Instruments centered, but the information translates well between manufacturers.


In my experience, a printer is the most useful design aid / sanity check. For example, I use Eagle to design my PCBs, and there are reference packages available for a very large range of devices. Simply printing out the design 1:1 helps a lot. It can also help you see things like "Those parts look like they would be hard to solder/probe" and "These parts are too close/far away". It's also cheap and fast. Some manufacturers will put 1:1 footprint drawings in datasheets as well, and you can use those for reference.

As for a specific design aid, I also have the SparkFun Reference Board, which helps you see what holes, text, and common packages look like on a footprint. I find it useful at times, especially when I'm trying to figure out readability of text.

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    \$\begingroup\$ If you have time, order the parts before laying out the board. This will show you something about part availability. And you can see the physical part sitting on a 1:1 printout. It's surprising how sizes all look the same in the CAD program. \$\endgroup\$ – markrages Jan 24 '13 at 2:44
  • \$\begingroup\$ @markrages Absolutely, I recommend the same. It's also a great way to catch any pin pitch, width, and size mismatch between your footprint and the actual part. \$\endgroup\$ – W5VO Jan 24 '13 at 5:18

I know this is an old post but to add to the knowledge base (for those who google it around like me) I found the following link for SMD standard size chart


Hope this helps! :)

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    \$\begingroup\$ It would be best to edit a picture or two into the answer in case the repository ever goes away. \$\endgroup\$ – David Feb 7 '15 at 18:10

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