CD74HC139M データシートの表示（PDF） - Harris Semiconductor

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CD74HC139M

High Speed CMOS Logic Dual 2-to-4 Line Decoder/Demultiplexer

Harris Semiconductor 

Functional Diagram

CD74HC139, CD74HCT139

2 (14)

A0

3 (13)

A1

1 (15)

E

4 (12)

Y0

5 (11)

Y1

6 (10)

Y2

7 (9)

Y3

Logic Diagram

TRUTH TABLE

INPUTS ENABLE SELECT

OUTPUTS

E

A1

A0

Y3

Y2

Y1

Y0

0

0

0

1

1

1

0

0

0

1

1

1

0

1

0

1

0

1

0

1

1

0

1

1

0

1

1

1

1

X

X

1

1

1

1

NOTE: X = Don’t Care, Logic 1 = High, Logic 0 = Low

2 (14)

A0

3 (13)

A1

1 (15)

E

4 (12)

Y0

5 (11)

Y1

6 (10)

Y2

7 (9)

Y3

2

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