7420

From TechWiki
Jump to: navigation, search

Dual 4-input NAND gates

    +---+--+---+             +---+---+---+---*---+        ____
 1A |1  +--+ 14| VCC         | A | B | C | D |/Y |   /Y = ABCD
 1B |2       13| 2D          +===+===+===+===*===+
    |3       12| 2C          | 0 | X | X | X | 1 |
 1C |4  7420 11|             | 1 | 0 | X | X | 1 |
 1D |5       10| 2B          | 1 | 1 | 0 | X | 1 |
/1Y |6        9| 2A          | 1 | 1 | 1 | 0 | 1 |
GND |7        8| /2Y         | 1 | 1 | 1 | 1 | 0 |
    +----------+             +---+---+---+---*---+