Tag Archives: footprint

Component Footprint Rotation, Part II

I’ve noticed that a lot of CAD library footprints for two-pin polarized parts have pin one pointed up as zero degree rotation. According to IPC, pin 1 pointed to the left is zero degree rotation. Why is this such a … Continue reading

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QFN? QFP? QFWHAT?

The QFN (quad flat pack, no leads) has become my favorite integrated circuit package. It’s very compact, yet is easier to use than a µBGA. µBGAs of 0.5mm and smaller pitch become a bit more difficult and costly with more … Continue reading

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More Cautionary Tails

I recently wrote about the horrors of LED marking variations. Unfortunately, LEDs aren’t the only place to find inconsistencies in our world. Another part to keep a close eye on is the ubiquitous three-terminal voltage regulator. For just short of … Continue reading

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And Another Footprint Thing

 When you are creating a footprint in your favorite CAD program, or reusing someone else’s footprint, double check the zero orientation. This post discusses the IPC-7351 specified zero rotation orientation. This picture on the left shows a library component with … Continue reading

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