This symbol has no associated speed key names. (Use the full name of the symbol).
Signals
Digital inputs: <i1> through <i999>
Digital output: <out>
Description
The NAND (negated AND) symbol drives its output signal high if any one or more of the inputs are low and low if all the inputs are high. A NAND symbol with a single input is equivalent to a NOT symbol. That is, the output will be the complement of the input.
The NAND symbol can be expressed using a truth table, where low stands for logical 0 (false), and high stands for logical 1 (true). Thus the truth table for a two-input NAND has <out> = high for the rows where <i1> = low, <i2> = low, or both are low.
Truth table for two-input NAND:
|
<i1> <i2> |
<out> |
|
low low |
high |
|
low high |
high |
|
high low |
high |
|
high high |
low |