History of D-sub connector footprints

If you look carefully you will notice that 9 pin ones are 0.108" I have over a hundred D connectors in my library and still have to make new ones. There are lot of subtle variations between manufacturers.

Regards,

Boris Mohar

Got Knock? - see: Viatrack Printed Circuit Designs (among other things)

void _-void-_ in the obvious place

I'm in need of a little help in verifying the pin layout of an IRF9610. I downloaded the IR data sheet but it doesn't specify witch lead is which. Package is TO-220AB. From past experience with power MOS FET, with the front facing you, it is from left to right GDS, but I need to be sure because I don't want to find out that it's the other way around when it tries to switch 117 VAC @ half an amp.

Thanks Pete

You can take it for granted that the pin arrangement will be G - D - S left to right looking at the package from the front side.

Here is a Nelson Pass design which uses this device

On Tue, 07 Feb 2006 01:52:05 GMT, Pete put finger to keyboard and composed:

- Franc Zabkar

I seem to remember a story that it was a drafting mistake!. The draftsman setting out one of the original connectors, allowed 1.3", for 13 pins. Forgetting that there is one less 'gap', than the pin number. This then gives 0.10833" per pin, which seems to be 'right'...

Best Wishes

Thanks for the info. And BTW it's 117 VDC (typo on my part. ) :) Later. Pete

"Joel Kolstad" wrote in news: snipped-for-privacy@corp.supernews.com:

These connectors were designed many years ago. .109 is 7/64".

Hmm... the thread regarding "Why are PCBs 62.5 mils thick?" suggests that "years ago" it would have been atypical to use fractions smaller than a 32nd? I'll keep your explanation in mind... although I'd have to say I'm almost wishing the bit about "the draftsman for a DB-25 mistakenly draw 1.3" end to end," is true, due to its more colorful quality. :-)