TTL became the base of computers and other digital electronics. The designation TTL is sometimes employed to mean TTL-compatible logic levels, even when not related directly with TTL integrated circuits, for illustration as a label on the inputs and outputs of the electronic instruments. TTL is noteworthy for being a widespread integrated circuit (IC) family employed in most of the applications like computers, test equipment industrial controls, instrumentation, and the consumer electronics, synthesizers, and so on. This is termed as transistor–transistor logic since both the logic gating function (example: AND) and the amplifying function are executed by the transistors (contrary with DTL and RTL). Transistor-transistor logic (TTL) is a class of digital circuits made from bipolar junction transistors (BJT) and resistors.
