The 7400 series of TTL IC's bearing the historical importance of being the first family of Logic ICs for wide use. Was used in the construction of minicomputers and mainframes in the 1960s and 1970s. Several generations of descendants electrically compatible original family have become the de facto standard componentes1 electronics industry for over 40 years.
The 14-pin DIP seen next is an example of a component of the 7400 series. The IC contains four two-input NAND gates. Each port uses two pins for input and one for output pin, the two additional contacts used for the power supply (+5 V) and ground connection.
The 7400 series contains hundreds of devices that provide from basic logic gates, flip-flops and counters, the bus transceivers specific use and ALUs. Specific functions are described in a list of 7400 series integrated circuits.
The former Soviet Union produced the K155ЛA3 that was electrically compatible component manufactured in 7400 EUA.
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