Układy CMOS i TTL

7427 – Trzykrotne, 3-wejściowe bramki NOR

1 Czas czytania (min)
    +---+--+---+             +---+---+---*---+       _____
 1A |1  +--+ 14| VCC         | A | B | C |/Y |  /Y = A+B+C
 1B |2       13| 1C          +===+===+===*===+
 2A |3       12| /1Y         | 0 | 0 | 0 | 1 |
 2B |4  7427 11| 3C          | 0 | 0 | 1 | 0 |
 2C |5       10| 3B          | 0 | 1 | X | 0 |
/2Y |6        9| 3A          | 1 | X | X | 0 |
GND |7        8| /3Y         +---+---+---*---+
    +----------+