74F151ASC datasheet(2/8 Pages) NSC

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Unit LoadingFan Out

54F74F

Pin Names

Description

Input IIH IIL

HIGHLOW

Output IOH IOL

I0–I7

Data Inputs

1010

20 mA b06 mA

S0–S2

Select Inputs

1010

20 mA b06 mA

Enable Input (Active LOW)

1010

20 mA b06 mA

Data Output

50333

1 mA20 mA

Inverted Data Output

50333

1 mA20 mA

Functional Description

The ’F151A is a logic implementation of a single pole 8-po-

sition switch with the switch position controlled by the state

of three Select inputs S0 S1 S2 Both assertion and nega-

tion 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 in-

puts The logic function provided at the output is

Z e E

(I0 S2 S1 S0 a I1 S2 S1 S0 a I2 S2 S1 S0 a

I3 S2 S1 S0 a I4 S2 S1 S0 a I5 S2 S1 S0 a

I6 S2 S1 S0 a I7 S2 S1 S0)

The ’F151A provides the ability in one package to select

from eight sources of data or control information By proper

manipulation of the inputs the ’F151A can provide any logic

function of four variables and its negation

Truth Table

Inputs

Outputs

XXX

LLL

LHL

HLH

HHH

H e HIGH Voltage Level

L e LOW Voltage Level

X e Immaterial

Logic Diagram

TLF9481 – 4

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

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