7404
The 7404 is a hex inverter integrated circuit, part of the 7400-series TTL logic devices. It contains six independent inverting gates, each with one input and one output. The device is designed for operation from a standard 5-volt supply and is commonly packaged in a 14-pin DIP (DIL) with corresponding surface-mount versions such as SOIC-14 and TSSOP-14.
In operation, a high input yields a low output and a low input yields a high output.
Common applications include signal inversion, buffering, and level-shifting in hobbyist and industrial digital circuits. Because it
Variants and successors include 74LS04 (low-power Schottky TTL), 74HC04 and 74HCT04 (CMOS variants), and other logic-family
History: The 7404 was part of the original TTL 7400-series introduced in the 1960s and 1970s by