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Ic date code

D

Doug

Member
I assume 8632 1986 32 week
What does the s:b mean?
Production plant?
Have some other in the ds series start with p and another b
Thanks
Doug
 

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Definitely a fab or lot identification.
I have some old TTL devices, some have the SB, others have an AJ or AK appendage to the date code.
 

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