This is a question about the markings on LM3886TF chips.
I am looking at LM3886TF chips on ebay. The photos show NS cases, marked with two strings: "LM3886TF" in all cases; and then a second string which varies: "PM79AK", or "JM17AFE3", or "PM35AF".
The second string (the one that is not "LM3886TF"), might indicate production run or something else.
My question is does anyone know what that second string means and where I might find docs or discussion of the merits of one chip version over the other.
--
My question is motivated from that in the CPU world there have been times when a particular run of a CPU model was a superior over-clocker or had exceptional power consumption behaviour.
Perhaps this second string printed on the LM3886TF case carries info of a similar nature?
I am looking at LM3886TF chips on ebay. The photos show NS cases, marked with two strings: "LM3886TF" in all cases; and then a second string which varies: "PM79AK", or "JM17AFE3", or "PM35AF".
The second string (the one that is not "LM3886TF"), might indicate production run or something else.
My question is does anyone know what that second string means and where I might find docs or discussion of the merits of one chip version over the other.
--
My question is motivated from that in the CPU world there have been times when a particular run of a CPU model was a superior over-clocker or had exceptional power consumption behaviour.
Perhaps this second string printed on the LM3886TF case carries info of a similar nature?
no such thing as overclocking in audio chips....
there are two case types, TF ussually means totally encapsulated device...just the T means the heatsink tab is not encapsulated.
there are two case types, TF ussually means totally encapsulated device...just the T means the heatsink tab is not encapsulated.
when i type this link w-ww.chipdocs.com/manufacturers/NSC.html#df, it will become the words "National Semiconductor" in blue. so you will go to that webpage directly (but without - between w-ww) or click at that words.
Those are Lot manufacturing codes, to help trace possible quality issues to the actual source, instead of wondering "who the @#~€¬"·$%& made this cr*p?"
This is one example of a full label, as printed on the cardboard box:
Of course you don't have that much space on the component, so it gets a much simplified version.
For an *incredible* investigative work, read:
http://www.avnet-logistics.eu/fileadmin/user_upload/Date_Code_Collection/AL_DC_collection.xls
Personally, I'd download it and have it available for future use.
As of fakers, they can *print* whatever they want, can't they 😉
This is one example of a full label, as printed on the cardboard box:
An externally hosted image should be here but it was not working when we last tested it.
Of course you don't have that much space on the component, so it gets a much simplified version.
For an *incredible* investigative work, read:
http://www.avnet-logistics.eu/fileadmin/user_upload/Date_Code_Collection/AL_DC_collection.xls
Personally, I'd download it and have it available for future use.
As of fakers, they can *print* whatever they want, can't they 😉
- Status
- Not open for further replies.