Question: The 74ALS00 NAND gate output in Example 8-7 needs to be used to drive some 74ALS inputs in addition to the load inputs described in

The 74ALS00 NAND gate output in Example 8-7 needs to be used to drive some 74ALS inputs in addition to the load inputs described in Example 8-7. How many additional 74ALS inputs could the output drive without being overloaded?

Data from Example 8-7

A 74ALS00 NAND gate output is driving three 74S gate inputs and one 7406 input. Using data from Table 8-7, determine if there is a loading problem.

Table 8-7

Outputs IOH -0.4 mA -1 MA -0.4 mA -2mA TTL Series 74 74S 74LS 74AS 74ALS 74F *Some devices may have different

Outputs IOH -0.4 mA -1 MA -0.4 mA -2mA TTL Series 74 74S 74LS 74AS 74ALS 74F *Some devices may have different input or output current ratings. Always consult the data sheet. IOL 16 mA 20 mA 8 mA 20 mA 8 mA 20 mA -0.4 mA -1 MA Inputs IIH 40 A 50 A 20 20 A 20 A 20 A IL -1.6 mA -2 mA -0.4 mA -0.5 mA -0.1 MA -0.6 mA

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