Digital Design_ Principles and Practices, Chegg Solution Manual_parte_207

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Step 1 of 3 6.03DP The Function Table for a 74x27 3-input NOR gate is given in Table 1. INPUTS OUTPUT ABCZ 1 X X 0 X 1 X 0 X X 10 0001 Table 1 Step 2 of 3 In the Function Table, representation of symbols is given as follows: A-C: inputs to the gate Z: output of the gate 0: Low Voltage level 1: High Voltage level X: Don't care condition The output for the above NOR gate can be represented as: Z= = A+B+C =ABC = Thus, for 3-input NOR gate, the De-Morgan's equivalent equation is Z= ABC Step 3 of 3 The functional diagram and the DeMorgan equivalent symbol for a 74x27 3-input NOR gate is shown in Figure 1. Figure1 Thus, the DeMorgan equivalent symbol for a 74x27 3-input NOR gate is drawn.