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2 Simple Application Controllers
5.5
The NAND Block (Not AND)
The Output comes ON if any or all inputs are OFF.
If every input is ON, the Output turns OFF.
Unused Inputs are considered to be ON.
If no Input pin is used, the block output is OFF.
(This is equivalent to an AND block followed by a NOT block)
.
Table 5.6: NAND Logic gate
Input 1
On
Off
On
On
On
Off
On
On
On
Off
Off
Off
On
Off
Off
Off
1
01
Output
2
3
NAND
4
Input 2
Input 3
On
On
Off
Off
On
On
On
Off
Off
On
On
On
On
Off
Off
On
Off
Off
On
On
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
Input 4
Output
On
Off
Off
On
Off
On
On
On
On
On
On
On
Off
On
Off
On
On
On
Off
On
On
On
On
On
Off
On
Off
On
Off
On
On
On
The Logic Function Blocks 5
1
0 0
O
2
3
N A N D
4
5 - 5
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