[sdiy] Tri-state outputs and CMOS inputs.

Dave Kendall davekendall at ntlworld.com
Fri Feb 20 16:56:22 CET 2009


Hi all.

I can't find a definite answer anywhere to this one - Do CMOS inputs 
need pull-up/down resistors if connected directly to the outputs of 
,say, a 3-state latch - which is not connected to anything else)
In my experiments, it *seems* to work OK, but there are too many 
variables in the rest of the circuit to be sure....

My gut feeling is that CMOS inputs *should* need resistors, but it'd be 
good to know for definite.

cheers,
Dave



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