PSoc5 reliability on production ?

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PSoc5 reliability on production ?

Postby alphatronique » Mon Sep 23, 2013 9:06 am

Hi

looking for use PSoc5 on some of my product

i run a pcb assembly shop and in the past i was burned by PSoc1 issue
1-) many board was hard to program
2-) if board temp rise around 50 deg chip hang and this cause massive and expensive product recall
so end up to black list that chip from all my production

but PSoc5 was new thing and look really good ,did someone have it on volume production
and did it have some issue whit it ?

Best regard
Marc L.
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Re: PSoc5 reliability on production ?

Postby danadak » Mon Sep 23, 2013 12:03 pm

Curious, was chip failure a device failure or a software failure in hanging
on a hot measurement because bounds were not constructed as fail safe
in code ? Was a failure analysis run on chips ? If so problem found ?

A lot of PSOC 1's have been shipped http://www.cypress.com/?rID=52849
Not to imply you did not have a problem, just simply its a success in many designs.

You can check with local sales office but PSOC 5 I believe is a different process.
It is a relatively new part, but in working forums both at cypress and here I have
not read about any significant production issue to date.

All PSOC, in fact all CMOS, as you know has parasitic SCR issues, and hot is worse as
betas go up. Also CMOS analogt has a lot of drift issues with temp, if not compensated
for in HW or SW, designs can fail.


Regards, Dana.
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Re: PSoc5 reliability on production ?

Postby alphatronique » Mon Sep 23, 2013 1:16 pm

Hi

that PSoC1 design was not from me ,was assembled it for one of my customer
i have review schematic and code and not fin issue at that time chip was CY8C21334-24
but all 3 Design have same issue ,put a air dryer over it and 5-10 sec later code stop
and since it was for automotive application in hot summer day i a car trunk it easy to reach 50 deg
have ask customer to send it back for failure analysis but have never send it ..

i googel about this but never find something similar ,but some company hide well it failure

but as said PSoc5 look really nice for put on my own product but just try to not got surprise lather
got to many bad experience in the past (,AVR never go in prod chip ,LM3S9Bxx ,PSoC1)
so if move to new chip must sure it not varnish and work :mrgreen:

Best regard
Marc l.
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Re: PSoc5 reliability on production ?

Postby danadak » Mon Sep 23, 2013 3:52 pm

Its unfortunate your end customer did not find actual problem, was it his
software, a specific PSOC lot, external part coupled with software interp-
retation ? An automotive environment, especialy in light of load dump
transients, etc, a very difficult challenge to CMOS LV circuits. This leaves
so many questions un-answered and that customer vulnerable to a repeat
of design failure in a future design. But I understand sometimes the
expediency of business leaves behind incomplete analysis.

Regards, Dana.
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Re: PSoc5 reliability on production ?

Postby bobsanjose » Sat Oct 12, 2013 8:28 pm

Marc,
you are correct that PSoC 5 is relatively new. It uses an ARM Cortex-M3 core but it cannot be programmed with the market standard JTAG programmers U-Link and J-Link, so you might be in for trouble with reliable programming (again). It appears that Cypress did not follow the standards like pretty much every other vendor of Cortex-M based chips. If you have a J-Link, you can program TI, Atmel, NXP, ST and many more but you are out of luck with PSoC 5.
I can't comment about other reliability issues if there are any but the incompatibility with existing ARM tools is a fact.
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