Hi Trudell,

There are solderability issues that you might want to look at for old
parts.  In J-STD-001B, section 5.2 it tells you some of the requirements.
Hope this helps.
Janice



From: [log in to unmask] on 03/23/98 11:37 AM EST

Please respond to [log in to unmask]; Please respond to
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To:   [log in to unmask]
cc:    (bcc: Janice LePage/US/Centigram)
Subject:  [TN] Electronic Devices - Age Limits




I have seen guidelines for the maximum age (date code limitations) that
electronic devices can be in order to be purchased (purchasing guidelines)
and in order to be assembled (assembly guidelines). I've seen maximums in
the range of 1 year to 2 years based on date code, but I've never seen the
reasoning/data behind these limits. The guidelines that I've seen do not
differentiate between device technology.
If you have guidelines, what are they and what are your reasons for setting
them?
Yves Trudell
Quality System Engineering
Nortel, Wireless Networks Calgary
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