Less confusion if they're related.
They're probably in the "schematic is only a netlist" crowd.
More hours per repair doesn't increase profit. ;-)
Then the company doesn't care.
It only makes sense because they have no idea how you're going to use the part. If you create your own, you can target the symbol for that one application (to make the flow more readable).
We use solid, 75-mil diameter, Made in America connection dots. We've never had one fall off a page. You must be using cheap made-in-Taiwan ebay dots.
You probably have to use the 4k7 notation, for the same reason.
On a sunny day (Sun, 05 Jan 2014 08:33:05 -0800) it happened John Larkin wrote in :
Made in America like the JSF? Its magnets come from China... Exclusive: U.S. waived laws to keep F-35 on track with China-made parts;
who knows whats in it them dots..
Any special reason U70-A has the power up-side down ??
hamilton
When you create an opamp symbol, in the usual triangle form, you can have the V+ on the same side as IN+, or on the opposite side.
When I draw an inverting amp, I want IN- up. When I draw a follower, I want IN- down. So the power pins get flipped.
We have considered having two versions of every opamp symbol, which PADS allows, but that has its own problems. Flipping the power pins now and then seems to be the least evil. We check them *very* carefully.
I mean a formal bus, a big solid line with smaller lines entering and exiting. Some people treat them as sort of like Panduit ducts, a place that every wire is routed through.
Control systems and appliances often have unreadable schematics, with that kind of "bus". You have to get a bunch of highlighters and trace the wires in colors to untangle them.
We always create our own PADS symbols and decals, and we do FPGAs that way, by bank.
We have a PADS Part Creation Form that enters a new part into our system.
We attach the relevant pages of the data sheet (usually first page, and PCB footprint) and our hand-drawn schematic symbol, the way we want it. The form kicks off PADS part creation, MAX (inventory database) part record creation, and an initial purchase. The Brat takes over and makes it all happen.
The part data sheet and any notes/measurements/photos/appnotes/whatever go into the MAX database.
Yep. I avoid 4-way's completely. Even though, in my chip designs, we do a thorough LVS after layout, I still tend to live on the side of caution. ...Jim Thompson
Duh! Standard CAD programs have off-page symbols just for that task.
...Jim Thompson
I want them inverting input up, in either configuration but if you have complete control, why not two symbols?
Indeed.
Schematics have two uses... for people they need to be visually informative, but, for the PCB, they need to netlist accurately, so multi-symbols shouldn't be an issue, if done properly... I do it all the time. Once confirmed, a Template is forever >:-} ...Jim Thompson
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