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Is this a fake LM4562NA?
Is this a fake LM4562NA?
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Old 12th July 2015, 11:00 PM   #21
kroto is offline kroto  Indonesia
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Quote:
Originally Posted by Alan0354 View Post
Is our hobby here really demand the volume that worth them counterfeit these parts? It's not like they sell millions......Thousands if they are lucky. I cannot imagine they can sell 1000 of this opamp. face it, this audiophile is a very small field.
well, they can relabel TL062 as anything they want, that is more than thousands I guess. A profit of more than 200%/pcs is very tempting

Quote:
Originally Posted by JensH View Post
I just took a couple of pictures of an LM4562. I got this one as a sample directly from National Semiconductor some years ago.
it looks very convincing
thanks.
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Old 13th July 2015, 04:42 AM   #22
mcandmar is offline mcandmar
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Quote:
Originally Posted by JensH View Post
I just took a couple of pictures of an LM4562. I got this one as a sample directly from National Semiconductor some years ago.
Looks the same as the one i got from Mouser back in March...
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Old 13th July 2015, 08:03 PM   #23
kroto is offline kroto  Indonesia
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Just checked my cheap LME49720HA (about US$7.7 I guess), and compared to my LM4562HA (maybe about US$13).
LME49720HA buy from china, LM4562HA from digikey.
You know what? The LME49720HA looks like an OLD Can OpAmp.. the body and the leg wasn't as clean as the LM4562HA. The marking not as bold as the LM4562HA.
LME49720HA has an Iq of less than 1mA total... !! Maybe its a second hand LM358H or the like..

From now on, I'm not gona buy too cheap OpAmp.. not worth at all.
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Old 15th July 2015, 12:17 PM   #24
kroto is offline kroto  Indonesia
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Default no edit button there, so I upload the picture here.

the two identical Cans OpAmp are "fake" LME49720HA, the other one is original LM4562HA (but a dead OpAmp because of oscillation).

the body & the seating plane of the fake LME49720HA looks dirty whereas it should be a new items.
Iq of less than 1mA, I guess it's a second hand LM358H or the like.

this is a proof, although they may be sell so little quantity, on a not-common type Op Amp, they do counterfeit them.

shame on me

sorry for my imperfect English
Attached Images
File Type: jpg LM49720HA Fake LM4562HA Ori.jpg (703.2 KB, 385 views)
File Type: jpg LM49720HA Fake.jpg (534.6 KB, 372 views)
File Type: jpg LM4562HA Ori.jpg (759.9 KB, 366 views)
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Old 15th July 2015, 01:13 PM   #25
mondogenerator is offline mondogenerator  England
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I got a few of these devices, in both HA and NA packaging, as TI samples.

Recently I checked to see who was cheapest FOR ME to order from.

Turns out TI were cheapest by far (I don't use mouser or digikey)
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Old 15th July 2015, 05:13 PM   #26
kroto is offline kroto  Indonesia
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that price ($8 & $13) is already with shipping & tax.
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Old 16th July 2015, 04:28 AM   #27
BrianL is offline BrianL  United States
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Is this a fake LM4562NA?
Kroto, if you look carefully at the first picture you posted, you can see what appears to be scrape marks on the top of the IC from the pin 1/8 end to the 4/5 end -- left-to-right in your picture. That makes me suspect that the original marking was 'sanded' off and replaced by new marking. Also, the molded "Korea" on the bottom is odd as I believe that National's assembly is in Malaysia, though it's possible that post-acquisition TI may have moved it.
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Old 28th August 2016, 01:25 PM   #28
mikaelmark is offline mikaelmark
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Quote:
Originally Posted by kroto View Post
that price ($8 & $13) is already with shipping & tax.
I just bought some LM4562MA at ebay from Hong Kong seller adeleparts2010 for less than a dollar each incl. shipping.

What do you think for the photo below, are they genuine National S. or Texas I. or are they maybe counterfeits? When I asked the seller, they told me not to worry, as they are new.

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Old 28th August 2016, 08:18 PM   #29
Mooly is offline Mooly  United Kingdom
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Is this a fake LM4562NA?
Quote:
Originally Posted by mikaelmark View Post
When I asked the seller, they told me not to worry, as they are new.
Well that's OK then

It can be hard to say for sure based on pictures alone... do some basic tests, current consumption and seeing what the HF response is like.
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Old 29th August 2016, 02:29 AM   #30
kroto is offline kroto  Indonesia
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Quote:
Originally Posted by mikaelmark View Post
I just bought some LM4562MA at ebay from Hong Kong seller adeleparts2010 for less than a dollar each incl. shipping.

What do you think for the photo below, are they genuine National S. or Texas I. or are they maybe counterfeits? When I asked the seller, they told me not to worry, as they are new.
hard to tell, but the the price is suspicious (so cheap).

I suggest you measure its supply current.

n.b (just to compare photos & price) : LM4562MA High Performance Audio Op Amp IC LM4562 1pcs | eBay
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