-The expansion pin is only an input. If it is not connected to the output of the previos stage, it must be grounded in order to get the "normal" gate behaviour.
-Ka is the three-state control for the output. -The logical functions are: Kb Kc Kd L L L NOR L H L OR H L L OR/AND (A+B+C+D)*(E+F+G+H) H H L OR/NAND ((A+B+C+D)*(E+F+G+H))' L L H AND L H H NAND H L H AND/NOR (ABCD+EFGH)' H H H AND/OR -Be careful: For static operation, everything workes fine. But old C-MOS is quite slow, and the connection of several gates via expand-input makes things worse: The inputs of the different stages have different propagation delay. -- Author: Steffen Maisch INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
