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Simple Application Controllers
The Logic Function Blocks 5
5 - 5
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 Input 2 Input 3 Input 4 Output
On On On On Off
Off Off Off Off On
On On On
Off On
On On
Off On On
On
Off On On On
Off On On On On
On On
Off Off On
On
Off On Off On
On
Off Off On On
Off On On Off On
Off On Off On On
Off Off On On On
On
Off Off Off On
Off On Off Off On
Off Off On Off On
Off Off Off On On
00
NAND
2
3
O
4
1
01
NAND
Output
1
2
3
4
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