You told your boss that it would be no problem to upgrade the design in Drill to 74AHCT components. But then you discover two problems: 1) there is no 74AHCT20, and 2) there is no room on the board to add another part! Luckily for you, the other half of the ’20 is unused, so you can replace the entire part with something else. However, your purchasing department emphatically states that only the parts listed in Table 6-2 are available. Find the fastest solution that uses only the gates in a single package. Then repeat Drill using your new design.
Drill
Using the information in Tables 6-2 and 6-3 for 74LS components, determine the maximum propagation delay from any input to any output in the 32-to-l multiplexer circuit of Figure 6-62. You may use the “worst-case” analysis method.
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