# NAND gate

The NAND gate, also called NAND logic, is a Boolean product of a non-AND operation between the two inputs" E1" and "E2".

Circuit-wise, such a logic can be formed as a series connection of an AND gate and a NOT gate. The inverter function is represented by a small circle at the output.

The output "A" is "0" if all inputs are "1". The output is "1" if at least one input is "0", this applies equally to two or more inputs. The value table corresponds to a negated truth table of an AND gate.

Circuit families for NAND gates are the 7400 in TTL logic and 4011 in CMOS.