TC74VHC138FN datasheet(2/10 Pages) TOSHIBA

Part #	TC74VHC138FN

Description	3-to-8 Line Decoder

Download	10 Pages

Scroll/Zoom	100%

Manufacturer	TOSHIBA [Toshiba Semiconductor]

Direct Link	http://www.semicon.toshiba.co.jp/eng

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2 / 10 page

TC74VHC138F/FN/FT/FK

2007-10-01

2

Pin Assignment

IEC Logic Symbol

Truth Table

Inputs

Outputs

Enable

Select

G1

A

2

G

B

2

G

C

B

A

0

Y

1

Y

2

Y

3

Y

4

Y

5

Y

6

Y

7

Y

Selected

Output

L

X

H

None

X

H

X

H

None

X

H

X

H

None

H

L

H

0

Y

H

L

H

L

H

1

Y

H

L

H

L

H

L

H

2

Y

H

L

H

L

H

3

Y

H

L

H

L

H

L

H

4

Y

H

L

H

L

H

L

H

5

Y

H

L

H

L

H

L

H

6

Y

H

L

H

L

7

Y

X: Don’t care

VCC

16

0

Y

15

14

13

12

11

10

1

2

3

4

5

6

7

2B

G

G1

7

Y

GND

8

9

(top view)

B

C

A

1

Y

2

Y

3

Y

4

Y

5

Y

6

Y

2A

G

7

EN

(1)

(3)

(2)

B

&

C

(6)

G1

(15)

(13)

(11)

(14)

(12)

(10)

2A

G

(4)

(5)

(9)

(7)

A

BIN/OCT

0

Y

1

Y

2

Y

3

Y

4

Y

5

Y

6

Y

7

Y

1

2

4

0

1

2

3

4

5

6

2B

G

7

(1)

(3)

(2)

B

&

C

(6)

G1

(15)

(13)

(11)

(14)

(12)

(10)

2A

G

(4)

(5)

(9)

(7)

A

0

Y

1

Y

2

Y

3

Y

4

Y

5

Y

6

Y

7

Y

0

2

0

1

2

3

4

5

6

2B

G

7

0

G

DMUX

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