" writes:

Our end customer is seeing failures of a intersil 82c87 Octal inverting
transceiver which is behaving like a non inverting transceiver (82c86).
We have opened up the component and the die is marked 82C86. The part
may have been marked incorrectly,rebadged or is counterfeit. Has anyone
else encountered this or can recommend a way of detecting counterfeit
components?

Have you contacted Intersil? Mistakes do happen.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.