INPUT EQUIVALENT CIRCUIT

LOGIC DIAGRAM

PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCT ION

1, 15

1G, 2G

Enable Inputs

2, 3

1A, 1B

Address Inputs

4, 5, 6, 7

1Y0 to 1Y3 Outputs

12, 11, 10,

9

2Y0 to 2Y3 Outputs

14, 13

2A, 2B

Address Inputs

8

GND

Ground (0V)

16

Positive Supply Voltage

TRUTH TABLE

INPUT S

OUTPUTS

ENABLE

SELECT

G

B

A

Y0Y1Y2

Y3

HX

X

H

H

H

H

L

LLL

H

H

H

LL

H

H

L

H

H

LH

L

H

HL

H

L

HHHH

H

L

X:Don’t Care

Thislogic diagram has notbe used to estimate propagation delays

74VHCT139A

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