27 Sep
2005
27 Sep
'05
4:35 p.m.
If a tristate
buffer is enabled by its control line, but the input
to the buffer is at high-Z is there a typical output?
High, but with less noise
immunity then if you tied the input high.
The immunity could vary with the TTL family, but leaving unused
inputs floating was standard practice with "standard" TTL, for
instance.