Digital integrated circuits often contain several logic gates in one package. ... The 7420 contains only two NAND gates because each one has four inputs and there are only 14 pins ... Figure 11-15 compares static controls with relay controls.
|Title||:||Industrial electronics and robotics|
|Author||:||Charles A. Schuler, William L. McNamee|
|Publisher||:||Gregg/Community College Div - 1986|