Replacement for ATXMEGA64D4-AU

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I have a product using this chip and I just got an order after a long while. I knew there might be problems with some components, but it seems this one is out of stock everywhere with 40-50 weeks lead time.

 

If someone knows where to get at least 30 of these or preferably 100, please let me know.

 

What could be used instead? Mouser seems to have ATXMEGA64D4-AN in stock. It has the same package. What's the difference? I couldn't find much info about AN in the datasheet or from Microchip site.

 

What about ATXMEGA128D4-AU? Can it be used with the same firmware or does it need to be recompiled? Any differences otherwise?

Last Edited: Mon. Aug 16, 2021 - 05:40 AM
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Go for ATXMEGA64D-AN, only difference I think is the operating temperature range, it has -40C - 105C, whereas ATXMEGA64D-AU is -40C - 85C.

“Everyone knows that debugging is twice as hard as writing a program in the first place. So if you're as clever as you can be when you write it, how will you ever debug it?” - Brian W. Kernighan
“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” - Antoine de Saint-Exupery

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jmaja1 wrote:
... this one is out of stock everywhere ...
Some stock at lesser tier distributors and possible stock at NRND/EOL distributors.

jmaja1 wrote:
... with 40-50 weeks lead time.
XMEGA availability is an issue; XMEGA may not be wafer fab'd by Microchip.

jmaja1 wrote:
What could be used instead?
AVR Dx may be considered as a follow-on to XMEGA D (respin PCBA) though more so megaAVR.

 


Inventory Search Tool - Ewing Components Inc.

Rochester Electronics (en-US) : Search for ATXMEGA64D4 (BGA)

 

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"Dare to be naïve." - Buckminster Fuller

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I forgot the "4" in the part number (edited the original post). At the moment I'm looking for a drop in replacement for ATXMEGA64D4-AU, which would use the same PCB and the same firmware.

 

Later on when I need to make a new PCB anyway due to another chip being out of production I will need to think what would be the best MCU for the future. But I still have that another chip (quite expensive) for 100 products and I want to use them with the current PCB and firmware.

 

So ATXMEGA64D4-AN should be fine. What about ATXMEGA128D4-AU?

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Depending of the size of your binary, even the ATXMEGA32D4-A or ATXMEGA16D4-a would fit.

In the same respect, the ATXMEGA32C4-A or ATXMEGA16C4-A is also, at least, pin-compatible.

A bit more expensive is the A/AU family, for example ATXMEGA64A(U)-A etc.

The best MCU for the future? Every vendor has superb variants. Only that you cannot purchase them at the moment.

ATSAMD2x seems to me a good choice. Still available at normal prices.

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I tried octopart.com...

 

Sure the authorized distributors all seem to be out of stock but I wonder if some of the "non-authorized" are worth exploring ?

 

You might also want to try findchip.com who might have other leads?

 

EDIT: actually it seems all findchip.com can offer is:

 

Last Edited: Mon. Aug 16, 2021 - 08:22 AM
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rammon wrote:
The best MCU for the future?
Is a moving target.

Semiconductors, especially some IC, are long lead-time (stock reels and trays)

Be able and willing to respin and requal PCBA.

Continually and proactively monitor the BOM.

rammon wrote:
ATSAMD2x seems to me a good choice. Still available at normal prices.
One series of Microchip MCU that has recent manufacturing adjustments though isn't wafer fab'd by Microchip; recommend MCU wafer fab'd by Microchip (AVRe, AVRe+, some AVRxt; in general, 8b MCU)

SAMD and SAML are one path of redesign away from AVR; PIC32CM is another.

 


ATMEL parts are running out of stock due to wafer shortage ? | AVR Freaks

 

RMES-29FWOL613 | Product Change Notification | Microchip

 

...

 

Title

CCB 3265.002 Final Notice: Qualification of UMC Fab 8N (U08N) as an additional fabrication site for selected ATSAMD20E1x, ATSAMD20G1X, ATSAMD20J1x and ATSAMD20E14 device families available in various packages.

 

...

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I did check Octopart before I wrote here and I did notice there were some parts with some non-authorized distributors not familiar to me.  Are they worth exploring and will they even sell to a small company in Finland?

 

I tried with Atmel Studio 7 and the simulator to program different "devices". Says "File contents does not fit within the device memory for programming Flash" for ATxmega16D4 and ATxmega32D4. Programs just fine with ATxmega64D4, ATxmega128D4 and ATxmega64A4U. But does that mean everything works identically?

 

I don't know would ATxmega32D4 work with recompiling? Atmel Studio says "Flash 24KB, Flash 1KB, Flash 3 KB, EEPROM 172bytes, Fuses 3bytes, Fuses 2bytes and Lock bits 1bytes". Shouldn't that fit into ATxmega32D4?

 

But I really wouldn't like to recompile. Firmware was made in 2015 and has worked flawlessly. Now I have different compiler versions etc. and I would need to do a lot of testing before I could deliver the products.

 

I asked Mouser what are the differences between -AU and -AN and they promised to find out.

 

About the "best MCU for the future" I meant best for my purpose. Not the most capable etc. MCU. I don't really need more than ATxmega64D4 can offer. Now (well maybe 2022 or 2023) I need to make a totally new PCB, since another component is out of production. So best MCU for the future could be ATxmega64D4, if it will be available at least 10 years.

 

But that is not something I need to decide now.

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jmaja1 wrote:
Are they worth exploring and will they even sell to a small company in Finland?
Wait?

Some ATxmega64D4 relief is arriving soon (enough?) in minimums of one tray (160)

jmaja1 wrote:
Programs just fine with ATxmega64D4, ATxmega128D4 and ATxmega64A4U. But does that mean everything works identically?
No as XMEGA AU has a pipelined ADC.

jmaja1 wrote:
Now I have different compiler versions etc.
Archive contains older compilers and Atmel Studio.

jmaja1 wrote:
So best MCU for the future could be ATxmega64D4, if it will be available at least 10 years.
May be though the best answer will be by a Microchip Technology applications engineer (yes, no, doesn't answer, IDK or the answer flies above one's headwink

Though there hasn't been much XMEGA EOL, ATxmega64D4-AN did EOL.

Am uncertain XMEGA is wafer fab'd by Microchip; older wafer fabs will eventually be decommissioned (therefore, XMEGA will EOL "sometime")

AVRxt AVR Dx will be alive for quite sometime.

 


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The best MCU for a product you are afraid to even recompile for (let away touching the sources)...

is the current MCU. 

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rammon wrote:

The best MCU for a product you are afraid to even recompile for (let away touching the sources)...

is the current MCU. 

 

Yes, I understand it sound weird. For this batch of 30 I want to minimize all the hassle. I haven't been using the tools since 2015, so I'm sure it would take some time to recompile, especially if I would do that with the version I used in 2015. I don't have that time right now, since I'm busy with other projects.

 

A lot will change when a new PCB is made, since the sensor the product is based on is changed and it will have totally different interface etc. Then I need to start more or less from scratch and will have more than a year to develop and test.

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 this one is out of stock everywhere with 40-50 weeks lead time.

Sometimes this is a "placeholder"  check in 2 weeks from now & it will say 15 days leadtime, or even in stock!  ....maybe you will be in luck!

 

 

 

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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A partial reel is arriving 31-Aug'21 to Mouser; can add a notification.

microchipDIRECT lead-time report is by subscription and arrives in one's e-mail on Mondays (IIRC, before sun rise CONUS)

microchipDIRECT probably sources to distributors though distributors may have a clearinghouse (distributors, PCBA manufacturers, etc)

 

ATXMEGA64D4-AUR Microchip Technology / Atmel | Mouser

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jmaja1 wrote:

rammon wrote:

The best MCU for a product you are afraid to even recompile for (let away touching the sources)...

is the current MCU. 

 

Yes, I understand it sound weird. For this batch of 30 I want to minimize all the hassle. I haven't been using the tools since 2015, so I'm sure it would take some time to recompile, especially if I would do that with the version I used in 2015. I don't have that time right now, since I'm busy with other projects.

 

A lot will change when a new PCB is made, since the sensor the product is based on is changed and it will have totally different interface etc. Then I need to start more or less from scratch and will have more than a year to develop and test.

In this case it is really a chance to upgrade the design to another MCU. I won't name a MCU anymore. Since you have other projects, you can choose something related.