74ACT151SC datasheet(2/9 Pages) FAIRCHILD

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Truth Table

= HIGH Voltage Level

= LOW Voltage Level

= Immaterial

Functional Description

The AC/ACT151 is a logic implementation of a single pole,

8-position switch with the switch position controlled by the

state of three Select inputs, S0, S1, S2. Both true and com-

plementary outputs are provided. The Enable input (E) is

active LOW. When it is not activated, the complementary

output is HIGH and the true output is LOW regardless of all

other inputs. The logic function provided at the output is:

= E • (I

0 • 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 + I 7 • S0 • S1 • S2)

The AC/ACT151 provides the ability, in one package, to

select from eight sources of data or control information. By

proper manipulation of the inputs, the AC/ACT151 can pro-

vide any logic function of four variables and its comple-

ment.

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

Inputs

Outputs

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