Google thinks the 303A20 part number belongs to a Rogers or CCI 0.03uF capacitor in a package like a 20-pin DIP. I couldn't find any pictures of it, though. It looks like the part coding is <capacitor code>A<package code>: i.e. a 104 (100nF) in a DIP40-like package is a 104A40. No idea what the A stands for.Originally Posted by spiffed
The numbers I found could just be total coincidence, though. I've never seen one in my life.
Good luck with the search!
Torben
Guess this blue DIP-like part
- 22nd January 2008 06:36 AM #1spiffed
Guess this blue DIP-like part
This blue DIP16 size 4-pinned part showed up in a recent purchase. I have um, hundreds of them, and no idea what they are. Any guesses?
- 22nd January 2008 08:24 AM #2Torben 0
- 22nd January 2008 10:01 AM #3JimB
It looks like a capacitor which is intended to be installed UNDER a DIL IC package.
The active connections are pins 7 and 14 (or 8 and 16), the GND and Vcc connections of the average 74 series IC.
The idea of mounting the capacitor under the IC is to minimise the lead length and improve the high frequency decoupling of the supply lines.
JimB0Experience is directly proportional to the value of the equipment ruined.
- 22nd January 2008 02:21 PM #4justDIY
i agree with the capacitor theory, but I also hypothesize it may also be a heat sink of some sort.
what material is it made from spiffed?0If you don't have a planet, what good are gold bars?
want to contact me directly? gmail gordonthree
check out my project website: http://projects.dimension-x.net
Favorite numbers:
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
- 22nd January 2008 04:08 PM #5spiffed
After abusing the one on my desk, it's made of plastic, with two metal plates inside. This pretty much confirms the capacitor theory. When I find out who borrowed my RCL meter, I'll confirm that.
Thanks everyone.0
- 22nd January 2008 04:13 PM #6spiffed
OK, it's a capacitor. The RCL meter and this datasheet confirms it.
Now I just need to think of something that needs hundreds of decoupling caps.0
- 22nd January 2008 06:11 PM #7crusty
looks kinda like a security tag.
0
- 22nd January 2008 07:00 PM #8mvs sarma So Nice, Spiffed-- you brought it out nicely. I do recollect it now as being used in telecom PCBs particularly in digital microwave equipments. Originally Posted by spiffed 0Regards,
Sarma.
- 22nd January 2008 07:02 PM #9picbits
I was going to guess some kind of reed relay but you've already put that idea to bed..
0
- 22nd January 2008 08:50 PM #10Nigel Goodwin Super Moderator
Like JimB said, it's a decoupling capacitor for a DIL logic chip - I've never actually seen one, but I have seen them listed in catalogues.
0PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk
| Tags |
| Similar Threads | ||||
| Thread | Starter | Forum | Replies | Last Post |
| Alert on BLUE SHOWER Cleaner/Degreaser | B-o-b | General Electronics Chat | 2 | 23rd June 2005, 12:42 AM |
| Alert on BLUE SHOWER Cleaner/Degreaser spray | B-o-b | Members Lounge | 1 | 22nd June 2005, 07:44 PM |
| Blue ray disk. | lord loh. | General Electronics Chat | 5 | 13th May 2005, 09:11 AM |
| What would you call this part? | TV-Engineer | General Electronics Chat | 3 | 7th April 2005, 04:59 AM |
| How can i identify the part number | zofiof | Datasheets, Manuals or Parts | 1 | 4th July 2004, 11:50 PM |