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Old 15th December 2014, 11:40 AM   #1
kroto is offline kroto  Indonesia
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Question Is this a fake LM4562NA?

Please take a look to the attachment.
I got this for about 2.5 US$/pcs from local supplier.
The strange thing is, if LM4562 has 10mA Quiescent current, why my NE5532(Iq=4.5mA) is more hot(warmer) than LM4562?
Is it new TI batch marking now have 8 digit? JR12AEE3 ??
Is the leg seems genuine?

The other strange thing if it fake is, why it sound more detail than my NE5532..
I'm sooo confused!
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File Type: jpg LM4562NA.jpg (205.7 KB, 110 views)
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Old 15th December 2014, 11:59 AM   #2
Mooly is offline Mooly  United Kingdom
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It looks dubious to me. The lettering isn't perfect for one thing, some appear to be at an angle and some out of line. The 5532 has a higher Iq than 4.5ma. 10 to 12 ma would be typical for the total combined current of the two amps in one package. A 4562 and 5532 probably run at around the same temperature from what I remember of them.
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Old 15th December 2014, 12:35 PM   #3
kroto is offline kroto  Indonesia
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Hi Mooly,

you see the right IC have a words on it: K O R E A 12 (and X in the midle)
the left IC have : K O R E A 13 (and X in the midle)
why are there have different bottom body mark/stamp for the same batch JR12AEE3 ?

but, I don't quite care anymore, they sound pretty good!
my ears don't eat number, they eat good music..

regards!
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Old 15th December 2014, 02:03 PM   #4
Mooly is offline Mooly  United Kingdom
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I got curious and so took some close ups of the 4562's I have and tbh the same things I criticise in yours are apparent in mine too.

They are physically a little different but in fairness having seen mine I wouldn't like to say.
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File Type: jpg DSCN0212.JPG (72.8 KB, 79 views)
File Type: jpg DSCN0213.JPG (93.0 KB, 76 views)
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Old 15th December 2014, 03:46 PM   #5
kroto is offline kroto  Indonesia
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according to TI batch numbering, my batch number JR..., the wafer fab plant should be made in Greenock, UK. and the Assembly Plant sub-con should be in Malaysia. but the bottom stamped Korea.
yours is 2B... that should be Taiwan & Thailand respectively.

I'm in total confuse!!
need to take a naap.....
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