TRUTH TABLE

INPUTS

OUTPUTS

ENABLE

SELECT

GL

G1

G2

C

B

A

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

X

X

H

X

X

X

HHHH

HHHH

X

L

XXXX

HHHH

HHHH

L

H

L

L

L

L

L

HHH

HHHH

L

H

L

L

L

H

H

L

H

H

HHHH

L

H

L

L

H

L

HH

L

H

HHHH

L

H

L

L

HH

HHH

L

HHHH

L

H

L

H

L

L

HHHH

L

HHH

L

H

L

H

L

H

HHHH

H

L

HH

L

H

L

H

H

L

HHHH

HH

L

H

L

H

L

HHH

HHHH

HHH

L

H

H

L

X

X

X

Outputs corresponding to stored address L: all others H

LOGIC DIAGRAM

M54/M74HC137

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