Image:7400.jpg

The view and element placement of the popular chip 7400. The chip contains four logical elements AND-NOT (NAND). The two additional contacts supply power (+5 V) and connect the ground.

The former Soviet Union manufactured the analog K155ЛA3, where even contacts were placed identically (the voltage supply was also + 5 V, so at least in some cases the chips were replaceable). It was a very popular chip, widely used by amateurs.

Literature

• http://opencircuitdesign.com/xcircuit/tutorial/tutorial2.html
• http://faraday.physics.utoronto.ca/IYearLab/digital.pdf
• http://www.answers.com/main/ntquery;jsessionid=17u3oewpvufgk?tname=7400-series&curtab=2222_1&hl=logic&hl=families&sbid=lc06a
• http://focus.ti.com/lit/ds/symlink/sn7400.pdf

Used GFDL images from Commons

• Image:TI SN7400N.jpg
• Image:7400 vs 4011.png

Composed by Audrius Meskauskas.

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• Logic gate
• 7400 series