7404

The 7404 (variants 74LS04, 74HC04) is a 74-series logic IC with six independent inverters.

7404 Pinout

      .--\/--.
 1A --|01  14|-- +5V
 1Y --|02  13|-- 6A
 2A --|03  12|-- 6Y
 2Y --|04  11|-- 5A
 3A --|05  10|-- 5Y
 3Y --|06  09|-- 4A
Gnd --|07  08|-- 4Y
      `------'

Signal descriptions

Y is the logical inverse of A