soldering SOIC to DIP

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Hi, I'm faced with soldering an SOIC chip to a SOIC/DIP adapter. Does
anyone have any suggestions/tips on how to go about doing this. My
past soldering experience has been with larger/less precise jobs.
Should I attempt this with a standard soldering iron? Toaster Oven?
Maybe there is a adhesive of sorts that I could just use a toothpick?
Any suggestions would be greatly appreciated. Thanks,

Kevin

 

[Spehro Pefhany]

Hi, I'm faced with soldering an SOIC chip to a SOIC/DIP adapter. Does
anyone have any suggestions/tips on how to go about doing this. My
past soldering experience has been with larger/less precise jobs.
Should I attempt this with a standard soldering iron? Toaster Oven?
Maybe there is a adhesive of sorts that I could just use a toothpick?
Any suggestions would be greatly appreciated. Thanks,

Kevin

An 0.050" pitch SOIC is *very* easy to solder with a standard
soldering iron tip. As someone else said, just tack a couple corners
down and go from there. It helps a bit if you flux the board first
with a flux pen and use nice rosin flux 63/37 solder. The tip doesn't
have to be especially fine, and neither does the solder. The finer
pitch (0.65mm and 0.5mm) parts are not that hard either, but you
should have some good desoldering braid on hand to clean up shorts.


Best regards,
Spehro Pefhany

 

[John Popelish]

Hi, I'm faced with soldering an SOIC chip to a SOIC/DIP adapter. Does
anyone have any suggestions/tips on how to go about doing this. My
past soldering experience has been with larger/less precise jobs.
Should I attempt this with a standard soldering iron? Toaster Oven?
Maybe there is a adhesive of sorts that I could just use a toothpick?
Any suggestions would be greatly appreciated. Thanks,

I hand solder an occasional SOIC chip with a 1/32 inch conical tip.
Anchor the board well, so you aren't chasing it around the bench.
Turn on a good light and wear your reading glasses.

I paint the under side of the pins with a flux pen. Then I tin one
corner pad with .020 63/37 tin lead flux core solder. Then heat that
to molten and slide the chip into place with fine curved point
tweezers. As long as only one pin is soldered, it is easy to look
things over and reheat to make any needed adjustment, including just
holding the chip down with the closed points of the tweezers and
reheating the pin to get everything down, flat.

Then I solder the opposite corner pin. After that, it is easy to
touch the tip to the end of each pin, and add a little solder on top.
If any pins get bridged, I clean up with a little solder wick.

 

[Bobo The Chimp]

.

should have some good desoldering braid on hand to clean up shorts.

Yeah! Can't be running around in dirty shorts! ;-P

Cheers!
Rich^H^H^H^HBoBo

 

[Ben Jackson]

Hi, I'm faced with soldering an SOIC chip to a SOIC/DIP adapter. Does
anyone have any suggestions/tips on how to go about doing this.

As others have said, just go for it. I've done down to SOT23-5 (to
a board I cut with an xacto knife!) by hand with a 1/32" conical tip.
It's much easier under a stereo microscope, but it's not necessary.
I've found that some experience using a microscope to do small parts
makes it easier to do them without the scope later because you can
visualize what's going on even if you can't see it.

I'd actually say SOJ and PLCC are trickier to do by hand, because if
you get a solder bridge it's tricky to get rid of (acrobatics with a
solder sucker) and you can't easily see the bridges in the first place.