National Semiconductor sold the mil grade Logic business to Arrow in 2005. I suggest checking with Arrow Electronics to see if they still have stock.
The 54F86 is an industry standard part. It could be replaced with the SN54F86 as long as the package…
Other Parts Discussed in Thread: SN74AHCT86 , SN74F86 Is there a list of TI product with the corresponding ESD Rating?
I am currently looking for the ESD rating of 54F86/74F86
2-Input Exclusive-OR Gate
Thanks in advance