Category:Printed circuit boards with integrated circuits from the 7400 series

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English: The ICs (integrated circuits) of the 7400 series have integrated transistor-transistor-logic (TTL) like AND, OR, NAND etc. and also more complex functions. In most early home and personal computers of the late 1970s and the 1980s (with the exception of, e.g., the Sinclair ZX 81), a plurality of these chips was directly mounted on the computer motherboard. Starting from about the second half of the 1980s, computer producers began to integrate the functionality of a large number of these 7400 chips in a few (or only one) larger ICs which were often produced according to the computer manufacturer's specifications (resulting finally in the so-called "Chipsets" for a certain microprocessor or microprocessor line). Thus, the number of ICs on computer motherboards went down, while the outer dimensions of the used chips increased on average, and large rows of the (relatively) rather small 7400 ICs were no longer seen - which had still kind of dominated the look of, e.g., the motherboards of the original IBM PC (introduced 1981) and the Apple II (introduced 1977).

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Media in category "Printed circuit boards with integrated circuits from the 7400 series"

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