The truth table for the NAND gate is commonly written in one of the
two forms below, where the true state **T** is represented by **1** and
the false state **F** is represented by **0**.

A: | B: | C: | A: | B: | C: | |
---|---|---|---|---|---|---|

(in) | (in) | (out) | (in) | (in) | (out) | |

F | F | F | 0 | 0 | 0 | |

F | T | F | 0 | 1 | 0 | |

T | F | F | 1 | 0 | 0 | |

T | T | T | 1 | 1 | 1 |

The AND operation has the usual logical significance -- the outcome is true if, and only if, both inputs are true. The symbol for AND looks like the "dot" representing the usual multiplication of two numbers; note that the truth table looks correct for multiplication of "0"s and "1"s.

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Last updated Oct. 27, 1998.

Copyright George Watson, Univ. of Delaware, 1998.