The.........logic family was an evaluation of a previous technology that used diodes and transistors for the basic NAND gate.
The transistor transistor logic family was an evaluation of a previous technology that used diodes and transistors for the basic NAND gate.
Transistor–transistor logic(TTL) is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"); it is the same naming convention used in resistor–transistor logic and diode–transistor logic.
TTL integrated circuits (ICs) were widely used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, and synthesizers.
A NAND gate is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW output results only if all the inputs to the gate are HIGH; if any input is LOW, a HIGH output results.