Electronics > Beginners
NAND outputs tied to ground
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David Hess:

--- Quote from: jmelson on June 11, 2019, 06:51:17 pm ---Actually there are THREE outputs tied to ground.  I suspect this is a very inventive circuit.  Pin 14 is connected to T41,   They are using a feature that putting a low on the input of the gates causes it to pull current from pin 14 to the grounded outputs, and that pin 14 then feeds some circuit.
--- End quote ---

They might also have picked which three to use to help present a better transmission line environment to the fast output.  Tektronix did this sort of thing with their own custom ICs to get maximum performance out of leaded packages.
amyk:
I suspect it may have a non-functional purpose: https://en.wikipedia.org/wiki/Trap_street
JuanGg:
Thanks to everyone. It makes for an intriguing topic.
    Juan
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