How to identify PCM1704?

[momokowut]

Could any body please tell me how to identify the grading of PCM1704 (say U,J or K) on the chip package?

 

[A 8]

Well, it is printed on the chip ie nothing-U, J-J, K-K

 

[momokowut]

My CD player claims that it use PCM1704-K, but only have "PCM1704" marked on the chip.
is it U grade?

 

[A 8]

It would seem so. Perhaps people here know more about you particular player if you tell us which one it is.

 

[Peter Daniel]

I bought PCM1704 K from Digi-Key. They do not have K markings, but two white dots.

 

[momokowut]

My CD player is Cxxy CD303/200 and no white dot on the chip.

so, it should be U grade, right?

 

[DaKi][er]

The 2 PCM1704's i got here have been marked with a J, though it isn't of the same material as the rest of the markings on it like it was done later on (as it probably would have been)

 

[Ruach]

I wrote to Texas Instrument regarding the dot markings.

Here is their reply to my query:

"In response to your query on PCM1704 kindly note that due to marking machine issue, we are marking grade rank by white dot on package.

J-grade is one white dot
K-grade is two white dot.

Hence two white dot pcm1704 parts are from TI and is really K-grade PCM1704."

 

[crt]

How about this CHIPS

http://cgi.ebay.com/DAC-IC-PCM1704-/110225607485?pt=LH_DefaultDomain_0&hash=item19a9f54b3d

They have 3 dots 😕

 

[SoNic_real_one]

On eBay you can find anything 🙂