mount anyway the "fake" in your amplifier and try it. If it works, the job is done and your IC was not fake. There is not proof that your lm4780 chips is fake.
Well here's the thing, I ran a continuity check and tested -v lines as well as positive pins according to the lm4780 datasheet and it does not match at all. The first and second row pins are inverted according to the data sheet. See attached picture.
Post a picture of that chip plz.
Here's an actual picture of the fakes. Odd pins should be short pins but they are long and on the first row.
An externally hosted image should be here but it was not working when we last tested it.
The odd pins are the long ones. Just as the LM3886. If you post a picture of the back of the chip, we might be able to tell real from fake by the shape of the metal on the back.
Either way, you're not going to find an LM4780 at any of the distributors. It was discontinued by TI 2-3 years ago.
Tom
Either way, you're not going to find an LM4780 at any of the distributors. It was discontinued by TI 2-3 years ago.
Tom
Do you still have them ?Hi, if you are still looking for LM4780, I have some (12 actually) left over from a project. They were ordered directly from Farnell, and are still in sealed bags.
Hello, Do you have any of those left over? I have a number of PCB's for this chip but no chips.Hi, if you are still looking for LM4780, I have some (12 actually) left over from a project. They were ordered directly from Farnell, and are still in sealed bags.
Send me a PM if you want...
LM4780 is available according to-
lm4780ta Stock and Price by Distributor
(findchips.com)
Mouser and TI
lm4780ta Stock and Price by Distributor
(findchips.com)
Mouser and TI
I have several tubes of LM3886, LM3875, LM4780 and LM4702, all ex-Digikey
Nonbelievers:
Attachments
Hello Jackinnj , I sent Pm regarding some chips,I have several tubes of LM3886, LM3875, LM4780 and LM4702, all ex-Digikey
Thanks ,
Gabe
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