Atmega32L 8au and Atmega32L 8ai

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What is the difference between atmega32L 8au and atmega32L 8ai?

Last Edited: Fri. Jun 26, 2020 - 10:29 PM
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Welcome to AVRFreaks!

 

What is driving your question?  Were are you finding the two markings?

 

I did not find the 8ai listed in the datasheet, but these normally indicate package style, temperature range, or location of manufacturer.

Why does it mater to you?

 

Jim

 

 

 

Keys to wealth:

Invest for cash flow, not capital gains!

Wealth is attracted, not chased! 

Income is proportional to how many you serve!

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Just to be clear what Jim was looking at is this part of the datasheet:

 

 

That admits to the existence of ATmega32L-8AU. It says it is the 8MHz 2.7V .. 5.5V version in this package:

 

 

But there is no mention of ATmega32L-8AI so where have you seen this product designation ?

 

(caveat: Microchip bought Atmel and in re-manufacturing they changed some details of package labelling so it's just possible that "8AI" is some new designation introduced by Microchip).

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clawson wrote:
it's just possible that "8AI" is some new designation

Also note the date on that datasheet: 

 

 

So, even though that is what's linked from the current Product Page, it is nearly a decade old!

 

surprise

 

It could also be that the OP has mis-read the markings - they can sometimes be hard to see!

 

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It is an obsolete product code.

 

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It looks very likely that between the 2003 d/s that kabasan showed and the 2011 one that I got from their website about 20 minutes ago that it was in 2008:

 

 

that the 8AI was removed.

 

Bottom line: it looks like you have some very old chips. Nothing to say that they are not as good as current ones, just "old" but silicon (unpowered) does not age.

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clawson wrote:

... Nothing to say that they are not as good as current ones ...

 

I guess quite likely that they have lead in them? 

 

So not an issue for hobby/lab use - but not suitable for production.

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ki0bk wrote:
these normally indicate package style, temperature range, or location of manufacturer.

So it was temperature range! 

 

Keys to wealth:

Invest for cash flow, not capital gains!

Wealth is attracted, not chased! 

Income is proportional to how many you serve!

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So, to directly answer the OP's question, These two chips are of the same speed grade, temperature range, and package.  I suppose it's possible there is a difference in errata (I didn't bother to check) if there has been significant time between their manufacture.  Also the 8AI could have lead (Pb) in them.

Letting the smoke out since 1978

 

 

 

 

Last Edited: Fri. Jun 26, 2020 - 07:21 PM
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ki0bk wrote:
So it was temperature range! 

Yes, I'm surprised you veteran AVR users didn't all pick up on the hints.  -pI is "industrial" temperature-rated; -pC is "commercial" temperature-rated.

 

There weren't that many available "automotive" temperature-rated.  Those could really get confusing; I remember T, X, and Z.

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Can we upload the flash data we read from the atmega32L 8AI processor to the atmega32L8 8AU processor via ISP?

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xmen14 wrote:
Can we upload the flash data we read from the atmega32L 8AI processor to the atmega32L8 8AU processor via ISP?

Try it and see!

Jim

 

 

Keys to wealth:

Invest for cash flow, not capital gains!

Wealth is attracted, not chased! 

Income is proportional to how many you serve!

Lets go Brandon!

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xmen14 wrote:
Can we upload the flash data we read from the atmega32L 8AI processor

not if it's locked, and/or damaged.

 

xmen14 wrote:
to the atmega32L8 8AU processor

To answer that, look at what digitalDan said:

In #9, digitalDan wrote:
These two chips are of the same speed grade, temperature range, and package.  I suppose it's possible there is a difference in errata (I didn't bother to check) if there has been significant time between their manufacture.  Also the 8AI could have lead (Pb) in them.

 

 

Presumably, the reason for the question is that you don't have the source code for the atmega32L 8AI ?

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