Microcontroller shelf-life
$begingroup$
Our purchasing department requested the AT32UC3B1256 and the supplier has a few thousand in storage. However, those trays have a date code from 2009.
While shelf-life is normally not much of an issue with integrated circuits, 10 years is quite a number.
I looked for some general info regarding shelf-life. For example TI states:
[...] TI’s standard shelf life for packaged products is two years from the time it was manufactured to the time it is delivered by TI or a TI authorized distributor.
TI also offers extended shelf life (ESL) of certain products for up to five years of total shelf life from the time it is manufactured to the time it is delivered by TI or a TI authorized distributor Product warranty is measured from the actual shipment date, not the date of manufacture.
According to supplier, the trays are sealed. What would be the limiting factor for shelf-life with respect to micro controllers? May those parts require long tempering before assembly?
tl;dr: Should we be concerned about buying 10 year old micro controller?
microcontroller lifetime
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
$endgroup$
add a comment |
$begingroup$
Our purchasing department requested the AT32UC3B1256 and the supplier has a few thousand in storage. However, those trays have a date code from 2009.
While shelf-life is normally not much of an issue with integrated circuits, 10 years is quite a number.
I looked for some general info regarding shelf-life. For example TI states:
[...] TI’s standard shelf life for packaged products is two years from the time it was manufactured to the time it is delivered by TI or a TI authorized distributor.
TI also offers extended shelf life (ESL) of certain products for up to five years of total shelf life from the time it is manufactured to the time it is delivered by TI or a TI authorized distributor Product warranty is measured from the actual shipment date, not the date of manufacture.
According to supplier, the trays are sealed. What would be the limiting factor for shelf-life with respect to micro controllers? May those parts require long tempering before assembly?
tl;dr: Should we be concerned about buying 10 year old micro controller?
microcontroller lifetime
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
$endgroup$
2
$begingroup$
I know moisture is a big worry. Often the trays have a moisture 'label' which changes colour. I would start with asking if they are present and if so what their status is.
$endgroup$
– Oldfart
32 mins ago
$begingroup$
Is it possible to buy some to test before the full order? Also depends on what level of guarantee your final product requires, e.g. medical or industrial may cause liability and/or certification issues.
$endgroup$
– Indraneel
27 mins ago
$begingroup$
The normal risk is moisture causing problems during reflow; the technique for dealing with these is to dry bake the chips at just above 100C for 24H.
$endgroup$
– pjc50
21 mins ago
add a comment |
$begingroup$
Our purchasing department requested the AT32UC3B1256 and the supplier has a few thousand in storage. However, those trays have a date code from 2009.
While shelf-life is normally not much of an issue with integrated circuits, 10 years is quite a number.
I looked for some general info regarding shelf-life. For example TI states:
[...] TI’s standard shelf life for packaged products is two years from the time it was manufactured to the time it is delivered by TI or a TI authorized distributor.
TI also offers extended shelf life (ESL) of certain products for up to five years of total shelf life from the time it is manufactured to the time it is delivered by TI or a TI authorized distributor Product warranty is measured from the actual shipment date, not the date of manufacture.
According to supplier, the trays are sealed. What would be the limiting factor for shelf-life with respect to micro controllers? May those parts require long tempering before assembly?
tl;dr: Should we be concerned about buying 10 year old micro controller?
microcontroller lifetime
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
$endgroup$
Our purchasing department requested the AT32UC3B1256 and the supplier has a few thousand in storage. However, those trays have a date code from 2009.
While shelf-life is normally not much of an issue with integrated circuits, 10 years is quite a number.
I looked for some general info regarding shelf-life. For example TI states:
[...] TI’s standard shelf life for packaged products is two years from the time it was manufactured to the time it is delivered by TI or a TI authorized distributor.
TI also offers extended shelf life (ESL) of certain products for up to five years of total shelf life from the time it is manufactured to the time it is delivered by TI or a TI authorized distributor Product warranty is measured from the actual shipment date, not the date of manufacture.
According to supplier, the trays are sealed. What would be the limiting factor for shelf-life with respect to micro controllers? May those parts require long tempering before assembly?
tl;dr: Should we be concerned about buying 10 year old micro controller?
microcontroller lifetime
microcontroller lifetime
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
asked 41 mins ago
Rev1.0Rev1.0
7,08443061
7,08443061
2
$begingroup$
I know moisture is a big worry. Often the trays have a moisture 'label' which changes colour. I would start with asking if they are present and if so what their status is.
$endgroup$
– Oldfart
32 mins ago
$begingroup$
Is it possible to buy some to test before the full order? Also depends on what level of guarantee your final product requires, e.g. medical or industrial may cause liability and/or certification issues.
$endgroup$
– Indraneel
27 mins ago
$begingroup$
The normal risk is moisture causing problems during reflow; the technique for dealing with these is to dry bake the chips at just above 100C for 24H.
$endgroup$
– pjc50
21 mins ago
add a comment |
2
$begingroup$
I know moisture is a big worry. Often the trays have a moisture 'label' which changes colour. I would start with asking if they are present and if so what their status is.
$endgroup$
– Oldfart
32 mins ago
$begingroup$
Is it possible to buy some to test before the full order? Also depends on what level of guarantee your final product requires, e.g. medical or industrial may cause liability and/or certification issues.
$endgroup$
– Indraneel
27 mins ago
$begingroup$
The normal risk is moisture causing problems during reflow; the technique for dealing with these is to dry bake the chips at just above 100C for 24H.
$endgroup$
– pjc50
21 mins ago
2
2
$begingroup$
I know moisture is a big worry. Often the trays have a moisture 'label' which changes colour. I would start with asking if they are present and if so what their status is.
$endgroup$
– Oldfart
32 mins ago
$begingroup$
I know moisture is a big worry. Often the trays have a moisture 'label' which changes colour. I would start with asking if they are present and if so what their status is.
$endgroup$
– Oldfart
32 mins ago
$begingroup$
Is it possible to buy some to test before the full order? Also depends on what level of guarantee your final product requires, e.g. medical or industrial may cause liability and/or certification issues.
$endgroup$
– Indraneel
27 mins ago
$begingroup$
Is it possible to buy some to test before the full order? Also depends on what level of guarantee your final product requires, e.g. medical or industrial may cause liability and/or certification issues.
$endgroup$
– Indraneel
27 mins ago
$begingroup$
The normal risk is moisture causing problems during reflow; the technique for dealing with these is to dry bake the chips at just above 100C for 24H.
$endgroup$
– pjc50
21 mins ago
$begingroup$
The normal risk is moisture causing problems during reflow; the technique for dealing with these is to dry bake the chips at just above 100C for 24H.
$endgroup$
– pjc50
21 mins ago
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
In my opinion the shelf-life might be more limited by whoever wants to take the responsibility to guarantee that the ICs still work rather than that there are technical reasons for the ICs to "expire". So more a legal responsibility than a technical issue.
I think it is very likely that the ICs will just work without issue as they were stored in a proper way, in a dry environment.
If the price of these ICs was considerably less than "new" ones and your company is willing to accept that there might be a small chance that there are issues with these ICs then it can be a good deal.
If you prefer "no risk" and "guaranteed to work" then you might need to use "new" ICs.
You do not mention what the supplier states about the fact that these ICs are 10 years old, do they still guarantee 10 years lifetime for example?
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
$endgroup$
add a comment |
$begingroup$
The concern is solderability.
If not stored correctly oxidation on the pins can cause problems in the solder process.
Try ordering a few to begin with and see how it goes.
Your EMS might have some tricks to deal with components that have been on the shelf too long.
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
$endgroup$
add a comment |
$begingroup$
I would not worry too much about the chips functioning.
What I would be relatively concerned about is solderability- that’s the main reason behind the relatively short “shelf life” numbers. A more aggressive flux may help- there may be some recommended procedures used by low volume high-rel folks who may have little choice about using NOS parts. At the other extreme, I’m told one car maker has a 6-month limit on parts - reflecting the perceived risk of unreliable PCBs vs. their ability to dominate suppliers.
Also, if you are not 100% sure they were stored in a low humidity cabinet, a specified bake procedure is called for to drive moisture out of the plastic packages and prevent damage in the reflow process- it’s unnecessary for hand soldering.
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
$endgroup$
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
In my opinion the shelf-life might be more limited by whoever wants to take the responsibility to guarantee that the ICs still work rather than that there are technical reasons for the ICs to "expire". So more a legal responsibility than a technical issue.
I think it is very likely that the ICs will just work without issue as they were stored in a proper way, in a dry environment.
If the price of these ICs was considerably less than "new" ones and your company is willing to accept that there might be a small chance that there are issues with these ICs then it can be a good deal.
If you prefer "no risk" and "guaranteed to work" then you might need to use "new" ICs.
You do not mention what the supplier states about the fact that these ICs are 10 years old, do they still guarantee 10 years lifetime for example?
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
$endgroup$
add a comment |
$begingroup$
In my opinion the shelf-life might be more limited by whoever wants to take the responsibility to guarantee that the ICs still work rather than that there are technical reasons for the ICs to "expire". So more a legal responsibility than a technical issue.
I think it is very likely that the ICs will just work without issue as they were stored in a proper way, in a dry environment.
If the price of these ICs was considerably less than "new" ones and your company is willing to accept that there might be a small chance that there are issues with these ICs then it can be a good deal.
If you prefer "no risk" and "guaranteed to work" then you might need to use "new" ICs.
You do not mention what the supplier states about the fact that these ICs are 10 years old, do they still guarantee 10 years lifetime for example?
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
$endgroup$
add a comment |
$begingroup$
In my opinion the shelf-life might be more limited by whoever wants to take the responsibility to guarantee that the ICs still work rather than that there are technical reasons for the ICs to "expire". So more a legal responsibility than a technical issue.
I think it is very likely that the ICs will just work without issue as they were stored in a proper way, in a dry environment.
If the price of these ICs was considerably less than "new" ones and your company is willing to accept that there might be a small chance that there are issues with these ICs then it can be a good deal.
If you prefer "no risk" and "guaranteed to work" then you might need to use "new" ICs.
You do not mention what the supplier states about the fact that these ICs are 10 years old, do they still guarantee 10 years lifetime for example?
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
$endgroup$
In my opinion the shelf-life might be more limited by whoever wants to take the responsibility to guarantee that the ICs still work rather than that there are technical reasons for the ICs to "expire". So more a legal responsibility than a technical issue.
I think it is very likely that the ICs will just work without issue as they were stored in a proper way, in a dry environment.
If the price of these ICs was considerably less than "new" ones and your company is willing to accept that there might be a small chance that there are issues with these ICs then it can be a good deal.
If you prefer "no risk" and "guaranteed to work" then you might need to use "new" ICs.
You do not mention what the supplier states about the fact that these ICs are 10 years old, do they still guarantee 10 years lifetime for example?
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
answered 29 mins ago
BimpelrekkieBimpelrekkie
48k240105
48k240105
add a comment |
add a comment |
$begingroup$
The concern is solderability.
If not stored correctly oxidation on the pins can cause problems in the solder process.
Try ordering a few to begin with and see how it goes.
Your EMS might have some tricks to deal with components that have been on the shelf too long.
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
$endgroup$
add a comment |
$begingroup$
The concern is solderability.
If not stored correctly oxidation on the pins can cause problems in the solder process.
Try ordering a few to begin with and see how it goes.
Your EMS might have some tricks to deal with components that have been on the shelf too long.
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
$endgroup$
add a comment |
$begingroup$
The concern is solderability.
If not stored correctly oxidation on the pins can cause problems in the solder process.
Try ordering a few to begin with and see how it goes.
Your EMS might have some tricks to deal with components that have been on the shelf too long.
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
$endgroup$
The concern is solderability.
If not stored correctly oxidation on the pins can cause problems in the solder process.
Try ordering a few to begin with and see how it goes.
Your EMS might have some tricks to deal with components that have been on the shelf too long.
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
answered 15 mins ago
Peter KarlsenPeter Karlsen
53629
53629
add a comment |
add a comment |
$begingroup$
I would not worry too much about the chips functioning.
What I would be relatively concerned about is solderability- that’s the main reason behind the relatively short “shelf life” numbers. A more aggressive flux may help- there may be some recommended procedures used by low volume high-rel folks who may have little choice about using NOS parts. At the other extreme, I’m told one car maker has a 6-month limit on parts - reflecting the perceived risk of unreliable PCBs vs. their ability to dominate suppliers.
Also, if you are not 100% sure they were stored in a low humidity cabinet, a specified bake procedure is called for to drive moisture out of the plastic packages and prevent damage in the reflow process- it’s unnecessary for hand soldering.
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
$endgroup$
add a comment |
$begingroup$
I would not worry too much about the chips functioning.
What I would be relatively concerned about is solderability- that’s the main reason behind the relatively short “shelf life” numbers. A more aggressive flux may help- there may be some recommended procedures used by low volume high-rel folks who may have little choice about using NOS parts. At the other extreme, I’m told one car maker has a 6-month limit on parts - reflecting the perceived risk of unreliable PCBs vs. their ability to dominate suppliers.
Also, if you are not 100% sure they were stored in a low humidity cabinet, a specified bake procedure is called for to drive moisture out of the plastic packages and prevent damage in the reflow process- it’s unnecessary for hand soldering.
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
$endgroup$
add a comment |
$begingroup$
I would not worry too much about the chips functioning.
What I would be relatively concerned about is solderability- that’s the main reason behind the relatively short “shelf life” numbers. A more aggressive flux may help- there may be some recommended procedures used by low volume high-rel folks who may have little choice about using NOS parts. At the other extreme, I’m told one car maker has a 6-month limit on parts - reflecting the perceived risk of unreliable PCBs vs. their ability to dominate suppliers.
Also, if you are not 100% sure they were stored in a low humidity cabinet, a specified bake procedure is called for to drive moisture out of the plastic packages and prevent damage in the reflow process- it’s unnecessary for hand soldering.
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
$endgroup$
I would not worry too much about the chips functioning.
What I would be relatively concerned about is solderability- that’s the main reason behind the relatively short “shelf life” numbers. A more aggressive flux may help- there may be some recommended procedures used by low volume high-rel folks who may have little choice about using NOS parts. At the other extreme, I’m told one car maker has a 6-month limit on parts - reflecting the perceived risk of unreliable PCBs vs. their ability to dominate suppliers.
Also, if you are not 100% sure they were stored in a low humidity cabinet, a specified bake procedure is called for to drive moisture out of the plastic packages and prevent damage in the reflow process- it’s unnecessary for hand soldering.
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
answered 11 mins ago
Spehro PefhanySpehro Pefhany
206k5155411
206k5155411
add a comment |
add a comment |
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2
$begingroup$
I know moisture is a big worry. Often the trays have a moisture 'label' which changes colour. I would start with asking if they are present and if so what their status is.
$endgroup$
– Oldfart
32 mins ago
$begingroup$
Is it possible to buy some to test before the full order? Also depends on what level of guarantee your final product requires, e.g. medical or industrial may cause liability and/or certification issues.
$endgroup$
– Indraneel
27 mins ago
$begingroup$
The normal risk is moisture causing problems during reflow; the technique for dealing with these is to dry bake the chips at just above 100C for 24H.
$endgroup$
– pjc50
21 mins ago