Let us first consider the working of the basic TTL gate. The circuit of the basic Transistor-Transistor Logic (TTL) gate is shown in the figure below. Working of Transistor-Transistor Logic (TTL) It is also known as T 2L family and was introduced by Texas Instruments in 1964. Transistor-Transistor Logic is the most popular and widely used IC logic family. The NAND gate is the basic building block of this logic family. It is a logic family implemented with bipolar process technology that combines or integrates NPN transistors, PN junction diodes, and diffused resistors in a single monolithic structure to get the desired logic function. TTL as outlined above stands for Transistor-Transistor Logic. Totem Pole Transistor-Transistor Logic (TTL):.Disadvantage of Single Output Stage TTL:.Working of Transistor-Transistor Logic (TTL).
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