The 7400 series of transistor-transistor logic (TTL) integrated circuits are historically important as the first widespread family of TTL integrated circuit logic. It was used to build the mini and mainframe computers of the 1960s and 1970s. Several generations of pin-compatible descendants of the original family have since become de facto standard electronic components.
Read more about 7400 Series: Overview, 7400 Series Derivative Families, History, Part Numbering Scheme, Second Sources in Europe and The Eastern Bloc
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