74LS151 Datasheet | Motorola Semiconductor

DESCRIPTION The LS151 is a logical implementation of a single pole, 8-position switch with the switch position controlled by the state of three Select inputs, S0, S 1, S2. Both assertion and negation outputs are provided. The Enable input (E) is active LOW. When it is not activated, the negation output is HIGH and the assertion output is LOW regardless of all other inputs. The logic function provided at the output is: Z = E ⋅ (I0 ⋅ S0 ⋅ S1 ⋅ S2 + ⋅ I1 ⋅ S0 ⋅ S1 ⋅ S2 + I2 ⋅ S0 ⋅ S1 ⋅ S2 + I3 ⋅ S0 ⋅ S1 ⋅ S2 + I4 ⋅ S0 ⋅ S1 ⋅ S2 + I5 ⋅ S0 ⋅ S1 ⋅ S2 + I6 ⋅ S0 ⋅ S1 ⋅ S2 + I7 ⋅ S0 ⋅ S1 ⋅ S2). The LS151 provides the ability, in one package, to select from eight sources of data or control information. By proper manipulation of the inputs, the LS151 can provide any logic function of four variables and its negation. TRUTH TABLE E H L L L L L L L L L L L L L L L L S2 X L L L L L L L L H H H H H H H H S1 X L L L L H H H H L L L L H H H H S0 X L L H H L L H H L L H H L L H H I0 X L H X X X X X X X X X X X X X X I1 X X X L H X X X X X X X X X X X X I2 X X X X X L H X X X X X X X X X X I3 X X X X X X X L H X X X X X X X X I4 X X X X X X X X X L H X X X X X X I5 X X X X X X X X X X X L H X X X X I6 X X X X X X X X X X X X X L H X X I7 X X X X X X X X X X X X X X X L H Z H H L H L H L H L H L H L H L H L Z L L H L H L H L H L H...