TRUTH TABLE

INPUTS

OUTPUS

ENABLE

SELECT

GL

G2

G1

C

B

A

Y0Y1

Y2Y3

Y4Y5

Y6Y7

X

X

L

X

X

X

L

LL

LL

LL

L

X

H

X

X

X

X

LL

LL

LL

LL

L

L

H

L

L

L

H

L

LL

LL

LL

L

L

H

L

L

H

L

H

LL

LL

LL

L

L

H

L

H

L

LL

H

L

LL

LL

L

L

H

L

H

H

LL

L

H

LL

LL

L

L

H

H

L

L

LL

LL

H

L

LL

L

L

H

H

L

H

LL

LL

L

H

LL

L

L

H

H

H

L

LL

LL

LL

H

L

L

L

H

H

H

H

LL

LL

LL

L

H

H

L

H

X

X

X

OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L

X: Don’t Care

PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCTION

1, 2, 3

A, B, C

Data Inputs

4

GL

Latch Enable Input

(Active LOW)

5

G2

Data Enable Input

(Active LOW)

6

G1

Data Enable Input

(Active HIGH)

15, 14, 13,

12, 11, 10, 9,

7

Y0 to Y7

Decoder Outputs

8

GND

Ground (0V)

16

Positive Supply Voltage

IEC LOGIC SYMBOLS

INPUT AND OUTPUT EQUIVALENT CIRCUIT

M54/M74HC237

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