In digital electronics, a N
AND gate
A ∧ B ¯ displaystyle overline Aland B , where the symbol ∧ displaystyle land signifies AND and the bar signifies the negation of the expression under it: in essence, simply ¬ ( A ∧ B ) displaystyle displaystyle neg (Aland B) . Contents 1 Symbols 2 Hardware description and pinout 3 Implementations 3.1 Alternatives 4 See also 5 References 6 External links Symbols[edit]
There are three symbols for NAND gates: the MIL/
ANSI
MIL/
ANSI
Hardware description and pinout[edit]
NAND gates are basic logic gates, and as such they are recognised in
TTL and
CMOS
This schematic diagram shows the arrangement of NAND gates within a
standard 4011
CMOS
Implementations[edit]
The N
AND gate
NMOS NAND gate PMOS NAND gate
CMOS
TTL NAND gate The physical layout of a
CMOS
Die of a 74AHC00D quad 2input N
AND gate
Silicon implementation of 4 NAND gates in an integrated circuit Alternatives[edit]
Further information:
NAND logic
Desired gate NOR Construction See also[edit] AND gate OR gate NOT gate NOR gate XOR gate XNOR gate Boolean algebra Logic gate NAND logic Digital electronics References[edit] ^ a b Mano, M. Morris and Charles R. Kime. Logic and Computer Design Fundamentals, Third Edition. Prentice Hall, 2004. p. 73. External links[edit] TTL NAND and AND gates  All About Circuits Wikimedia Commons has media related to NAND gates. v t e Logical connectives Tautology/True ⊤ displaystyle top Alternative denial (NAND gate) ↑ displaystyle uparrow Converse implication ← displaystyle leftarrow Implication (IMPLY gate) → displaystyle rightarrow Disjunction (OR gate) ∨ displaystyle lor Negation (NOT gate) ¬ displaystyle neg Exclusive or (XOR gate) ↮ displaystyle nleftrightarrow Biconditional (XNOR gate) ↔ displaystyle leftrightarrow Statement Joint denial (NOR gate) ↓ displaystyle downarrow Nonimplication ↛ displaystyle nrightarrow Converse nonimplication ↚ displaystyle nleftarrow Conjunction (AND gate) ∧ displaystyle land Contradiction/False ⊥
