Piggybacking 74LS logic chips to confirm a suspected fault

[Chuck Guzis]

On 12/22/2015 01:10 PM, Alexandre Souza wrote:
> It works if the gate is open. But if it is shorted to gnd/vcc, you're
> in trouble :)

In my experience, this is the case with a lot of 4000-series CMOS. 
Don't exactly understand why.

--Chuck