ATXMEGA marking?

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#1
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What do the letters U-TW mean in the marking?

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My guess is that the silicon was fabbed in Taiwan.

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Can I trust such a chip?

Previously it was ...A1U-AU, and now ...A1U-U-TW.

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But the "other numbers" you see on chips tend to be just batch numbers, date codes, and other internal data used by the manufacturer to track production/stock.

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Now all the new chips will be so marked?

Package 100A is now simply U and not AU?

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Not really sure of the point you are making. Surely the only important (to the end user) marking on that chip is:

 

That to me says this is an Xmega128A1U. End of story. It does not really need code letters to say it is a QFP - you can see it is a QFP!

 

The only things that might concern me slightly (though they might just be artefacts of the photo?) are that the official part number certainly always used to be ATXEMGA... and I can't quite read the "AT" at the start of that. Also the Atmel logo on that looks very low quality. Maybe it's just because it is printed very small but it looks almost "italic" in that image. Which seems a bit odd.

Last Edited: Wed. Feb 14, 2018 - 01:07 PM
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Nо artefacts. AT is not present.

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Are there any markings on the back?

 

Steve

Maverick Embedded Technologies Ltd. Home of the wAVR: WiFi AVR ISP/PDI/uPDI Programmer. http://www.maverick-embedded.co.uk/

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The lack of AT prefix (ATmel after all!) is presumably something to do with the transition from Atmel to Microchip but odd that they retained the actual logo.

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In case you missed it, Microchip have taken over Atmel and ALL product marking is subject to change. If you search the Microchip site you can find the PCN (product change notices) that document the changes.

"This forum helps those that help themselves."

"How have you proved that your chip is running at xxMHz?" - Me

"If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand." - Heater's ex-boss

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"Dare to be naïve." - Buckminster Fuller

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scdoubleu wrote:

Are there any markings on the back?

On the back there is no any text.

 

Last Edited: Sat. Feb 17, 2018 - 10:52 AM
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agentXMEGA wrote:

scdoubleu wrote:

Are there any markings on the back?

On the back there is no any text.

That would seem to tie in with the new markings described in the docs linked above by gchapman.

 

Steve

Maverick Embedded Technologies Ltd. Home of the wAVR: WiFi AVR ISP/PDI/uPDI Programmer. http://www.maverick-embedded.co.uk/