M54HC137

2/10

IEC LOGIC SYMBOLS

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

PIN N°

SYMBOL

NAME AND FUNCTION

1, 2, 3

A to C

Data Inputs

4GL

Latch Enable Input (Active

LOW)

5G2

Data Enable Input (Active

LOW)

6

G1

Data Enable Input (Active

HIGH)

9, 10, 11, 12,

13, 14, 15,

7

Y0 to Y7

Multiplexer Outputs

8

GND

Ground (0V)

16

Positive Supply Voltage

INPUTS

OUTPUTS

ENABLE

SELECT

GL

G1

G2

CBA

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

X

X

H

X

X

X

HHHHHHHH

X

L

XXXX

HHHHHHHH

L

H

LLLL

L

HHHHHHH

L

H

L

L

L

H

H

L

HHHHHH

L

H

L

L

H

L

HH

L

HHHHH

L

H

L

L

HH

HHH

L

HHHH

L

H

L

H

L

L

HHHH

L

H

HH

L

H

L

H

L

H

HHHHH

L

H

H

L

H

L

H

H

L

HHHHHH

L

H

L

H

L

HHH

HHHHHHH

L

H

H

L

X

X

X

Outputs corresponding to stored address L: all others H