Another extension to the series is the xxx variant, representing mostly the bit wide counterpart of otherwise 8-bit-wide "base" chips with the same three ending digits. In a few instances, such as the andthe same suffix in different families do not have completely equivalent logic functions. Not all functions are available in all families. Conversely, the Wikipedia series has "borrowed" from the series - such as the CD and CD being pin-for-pin functional replacements for 74C and 74C A few alphabetic characters to designate a specific logic subfamily may immediately follow the 74 or 54 in the part number, e. See Wikipedia:list of series integrated circuits. A short-lived 64 prefix on Wikipedia:Texas Instruments parts indicated an industrial temperature range this prefix had been dropped from the TI literature by Surface mount parts with a single gate often in a 5-pin or 6-pin package are prefixed with G instead of Some manufacturers released some equivalent CMOS circuits with a 74 prefix, for example the 74HC was a replacement for the with slightly different electrical characteristics different power supply voltage ratings, higher frequency capabilities, lower "on" resistances in analog switches, etc.
These parts are prefixed with 54 instead of 74 in the part number. Some TTL logic parts were made with an extended military-specification temperature range. Just the base numbers are listed below, that is: parts are listed here as if made in the basic, standard power and speed, TTL form, although many later parts were never manufactured with that technology. Because of the popularity of these parts, they were second-sourced by other manufacturers who kept the sequence number as an aid to identification of compatible parts.Īs well, compatible TTL parts originated by other manufacturers were second sourced in the TI product line under a 74xxx series part number. The following is a list of Wikipedia series digital logic Wikipedia:integrated circuits.
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