Logic Gates and Related Devices
101
Figure 4.43 IEEE / ANSI symbols.
all the functional blocks or in other words similarly affect various individual but similar functions are
represented by a separate notched rectangle on the top of the main rectangle.
4.12.2 ANSI Symbols for Logic Gate ICs
Figure 4.44 shows the ANSI symbol for IC 7400, which is a quad two-input NAND gate. The figure
is self-explanatory with the background given in the preceding paragraphs. Any other similar device,
i.e. another quad two-input NAND gate belonging to another logic family, would also be represented
by the same ANSI symbol. As another illustration, Fig. 4.45 shows the ANSI symbol for IC 7420,
which is a dual four-input NAND gate.
101
Figure 4.43 IEEE / ANSI symbols.
all the functional blocks or in other words similarly affect various individual but similar functions are
represented by a separate notched rectangle on the top of the main rectangle.
4.12.2 ANSI Symbols for Logic Gate ICs
Figure 4.44 shows the ANSI symbol for IC 7400, which is a quad two-input NAND gate. The figure
is self-explanatory with the background given in the preceding paragraphs. Any other similar device,
i.e. another quad two-input NAND gate belonging to another logic family, would also be represented
by the same ANSI symbol. As another illustration, Fig. 4.45 shows the ANSI symbol for IC 7420,
which is a dual four-input NAND gate.