Texas Instruments SN74S20IN TTL logic chip replacement?

Andy, with just the solder holding everything together, is there enough structural strength that you can insert/remove that chip and things will stay together?

Yes, if it's soldered properly. You're just using it like glue in this case. The leg you're cutting an using for the repair should overlap the stub that is on the chip.

That's why it's important to clean both sides of the joint with the sandpaper or file, to be sure the solder wets to both sides of the joint. Then you're just flowing the two pieces together.

It's no different than how the chips are being held to the PCB with solder.
 
Andy, with just the solder holding everything together, is there enough structural strength that you can insert/remove that chip and things will stay together?

Just curious. I usually shy away from just using solder to bind things together.

The right way to do it is to get a machine pin socket, clean the legs on the bad chip, insert it into the socket the solder it all together.

That way the new socket provides physical stability, not the solder.
 
The right way to do it is to get a machine pin socket, clean the legs on the bad chip, insert it into the socket the solder it all together.

That way the new socket provides physical stability, not the solder.


Then it sticks up and looks like ass. And it's overkill. That's only needed if you're fixing a chip where the pin broke flush with the package, not where you have a huge stub left to work with. If you repair just the broken leg with a surrogate leg, and you do it cleanly, you almost can't even tell it was broken.

Solder sticks to things. The leg isn't undergoing any tensile stress when it's in the socket. The solder is more than sufficient to hold two small pieces of metal together.

You know, like how solder works.
 
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