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7412 Triple 3-INPUT NAND GATE
POSITIVE LOGIC

For other 7400 series TTL IC datasheets, CLICK HERE



The 7412 IC package contains three independent positive logic, three input NAND GATES. Pins 14 and 7 provide power for all three logic gates.

7412
74LS12 = Low Power Schottkey
74HCT12 = High Speed

74LS12, 74HCT12, 7412 Picture

For the QUAD Two-Input variant refer to 7400
7412 Triple 3-Input NAND Gate internal diagram
SOIC, DIP packages for the 7412 / 74LS12

7412 DATASHEET
Diagram below reveals a typical circuit application using a quad 2-input NAND gate IC.
Simple circuit made with 7400 IC
Outputs of one gate can be connected to inputs of another within the same chip or to another chip as long as they share the same ground. The figure to the left illustrates a basic circuit showing how to wire inputs and using LEDs to display outputs.

NAND GATE Logic-Rules:

The same basic rules apply for the triple input NAND gate as in other more common 2-input variants.

If the three inputs are labeled A, B, and C and the output = X, then the states can be modeled by the following chart:

A*B*C = X
0*0*0=1
0*0*1=1
0*1*0=1
0*1*1=1
1*0*0=1
1*0*1=1
1*1*0=1
1*1*1=0