I have a requirement for an inverting 3-to-8 decoder circuit (i.e. all 8 output high except the selected one being low), but with an option to have all the outputs go low.
The 74HC137 or 74HC138 is close to what I need, but it's three reset conditions all have all outputs high.
Does anyone know of a real-estate-conserving solution (i.e. not a lot of components)?
EDIT: Desired truth table:
A B C R 7 6 5 4 3 2 1 0
0 0 0 0 H H H H H H H L
0 0 1 0 H H H H H H L H
0 1 0 0 H H H H H L H H
0 1 1 0 H H H H L H H H
...
1 1 1 0 L H H H H H H H
X X X 1 L L L L L L L L
R represents some sort of reset input that enables all the outputs (lines 0-7). A, B, and C are the address inputs.