ATmega328p: NRND !!

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westfw
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Posted by westfw: Wed. Oct 20, 2021 - 05:37 AM
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https://www.microchip.com/en-us/... says:

 

No links to the datasheet, or to any "suggested replacement" ??

(yes, I can find the datasheet via other paths.)

(Atmega168PA and ATmega88PA are still listed as "in production."  Website glitch of some kind?)

 

Tags:

AVR Microcontrollers, megaAVR and tinyAVR, PCN, Microchip Studio, microchipDIRECT, ATmega328P, atmega328pb, AVR32DA28, AVR32DA32, AVR32DB28, AVR32DB32
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ka7ehk
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Posted by ka7ehk: Wed. Oct 20, 2021 - 05:53 AM
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Replacement Mega328PB?

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

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grohote
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Posted by grohote: Wed. Oct 20, 2021 - 07:17 AM
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westfw wrote:
No links to the datasheet

 

Link is gone two weeks ago.

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Bronze Markawneil
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Posted by awneil: Wed. Oct 20, 2021 - 08:16 AM
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westfw wrote:
No links to the datasheet

Nor any app notes! surprise

That's changed in the last few days, then!

 

But they have been having problems with the Product Pages lately[1]

 

However:

 

 

 

EDIT

 

[1] see: https://www.avrfreaks.net/commen... - and following posts

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Last Edited: Wed. Oct 20, 2021 - 08:20 AM
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Gold Markclawson
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Posted by clawson: Wed. Oct 20, 2021 - 08:24 AM
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For a long time there it was the case that if you went to the 328P device page and downloaded the datasheet it was the Automotive one you would get. I had to go to non-Microchip sites whenever I wanted to look at the "normal" one.

 

Apart from the automotive thing I tend to agree that they might presumably consider the 328PB a better choice for folks to use?

awneil wrote:
But they have been having problems with the Product Pages lately
That too - you couldn't get to product pages and datasheets for the very newest chips the other day though that hiccup seems to have been fixed now.

 

The weird thing though is that I always thought that Microchip had a reputation for never EOL'ing MCUs and they'd go on making models as long as someone wanted to buy them. It does seem odd that a "big hitter" like 328P would be EOL'd. I wonder if this is actually an attempt to kill off the original Arduino Uno design as too many people go on to put a 328P in their design after having prototyped it on Arduino. If they could be persuaded to use Arduinos with more modern chips then they'd presumably become the popular choices ?

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avrcandies
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Posted by avrcandies: Wed. Oct 20, 2021 - 10:17 AM
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I remember our debates during design, we used the mega48, 88, and sometimes the 168.  Getting to use the 328 was like finally being approved to get an LCD monitor. 

 

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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Bronze Markawneil
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Posted by awneil: Wed. Oct 20, 2021 - 10:38 AM (Reply to #5)
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clawson wrote:
I always thought that Microchip had a reputation for never EOL'ing MCUs

Indeed - they do like to play on that.

 

I guess they would argue that marking it as "NRND" is not the same as "EOL" ?

 

Still seems ridiculous to remove all the documentation, though ...

 

frown

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gchapman
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Posted by gchapman: Wed. Oct 20, 2021 - 02:10 PM
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westfw wrote:
, or to any "suggested replacement" ??
Recommended replacement would be in an ATmega328P EOL PCN along with the LTB date.

westfw wrote:
Website glitch of some kind?)
More likely is right-hand doesn't know what the left-hand is doing; possibly understaffed due to the current "all hands on deck".

If you want to save that web page's instance then recommend you archive it.

 

P.S.

As a young man, I received bunny suit training for a contingency (a risk was low staffing)

Did one's manager ask the rhetorical question "Do you want to work at a wafer fab?"wink (Tempe's next door to Chandler)

 

How to search for Microchip PCNs

Product Change Notifications | Microchip

mega328P have a second wafer fab in Tempe; Gresham may be likely.

Tempe Fab 2, Gresham Fab 4 | AVR Freaks

 

Webpage archive

 

Bunny suit | encyclopedia article by TheFreeDictionary

🙄 not the last two

 

"Dare to be naïve." - Buckminster Fuller

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Bronze Markawneil
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Posted by awneil: Wed. Oct 20, 2021 - 02:13 PM (Reply to #8)
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gchapman wrote:
ATmega328P EOL PCN along with the LTB date.

But it's not EOL (yet); just NRND - so what is now the RND ?

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
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gchapman
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Posted by gchapman: Wed. Oct 20, 2021 - 02:34 PM (Reply to #5)
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clawson wrote:
I had to go to non-Microchip sites whenever I wanted to look at the "normal" one.
The datasheet's URL is in the erratum after a datasheet has completed the transition from Atmel-form to Microchip-form.

clawson wrote:
The weird thing though is that I always thought that Microchip had a reputation for never EOL'ing MCUs ...
There's a practice.

clawson wrote:
... and they'd go on making models as long as someone wanted to buy them.
Lately, seems the MCU EOL are due to manufacturing issues.

A guess is the current lead frame shortage is roosting.

clawson wrote:
It does seem odd that a "big hitter" like 328P would be EOL'd.
I'd <fill-in-the-blank> in my pants (trouserswink

 

Online Docs (web docs, Errata in pull-down menu, reference documents are in PDF [web docs may have glitched figures])

 

Our Practice on Product Longevity | Microchip Technology

 

GBNG-14CATI014 | Product Change Notification | Microchip

Title

eSign# E000072353: End of Life (EOL) of selected Atmel ATtiny13A, ATtiny25, ATtiny45 and ATtiny85 device families available in 8L SOIJ NiPdAu LF package.

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

 

"Dare to be naïve." - Buckminster Fuller

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gchapman
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Posted by gchapman: Wed. Oct 20, 2021 - 03:02 PM (Reply to #9)
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awneil wrote:
(yet)
An AVR's total EOL is relatively rare.

awneil wrote:
so what is now the RND ?
likely mega328PB though would require a low load capacitance high frequency crystal (reduced swing oscillator for less current); my RND is AVR32DA32 or AVR32DB32 (internal high frequency oscillator auto-tune, AVR32Dx28 in PDIP) with mega3208 as an alternative.

 

Device Notes | Device Support | Microchip Studio Release Note

 

Full Swing Oscillator | AT15007: Differences between ATmega328/P and ATmega328PB

Clock Sources | Migration from the megaAVR® to AVR® Dx Microcontroller Families (bottom)

Revision History | Selecting and Testing 32.768 kHz Crystal Oscillators for AVR® Microcontrollers (AVR Dx were added)

 

Lead Time | World's Largest Inventory of Microchip Products

mega328PB's lead time is 38 weeks automotive QFP in trays else 52 weeks.

AVR32Dx lead time can be as low as 19 weeks (package dependent)

 

"Dare to be naïve." - Buckminster Fuller

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Bronze Markawneil
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Posted by awneil: Thu. Oct 21, 2021 - 02:02 PM
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If you raise a support case on ATmega328P, you get this:

 

frown

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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