Nexperia

74LVC138A

3-to-8 line decoder/demultiplexer; inverting

001aad035

74LVC138A

GND(1)

Y7

Y5

E3

Y4

E2

Y3

E1

Y2

A2

Y1

A1

Y0

Transparent top view

7

10

6

11

5

12

4

13

3

14

2

15

terminal 1

index area

(1) This is not a ground pin. There is no electrical or mechanical requirement to solder the pad. In case soldered,

the solder land should remain floating or connected to GND.

Fig. 6. Pin configuration SOT763-1 (DHVQFN16)

5.2. Pin description

Table 2. Pin description

Symbol

Pin

Description

A0, A1, A2

1, 2, 3

address input

E1, E2

4, 5

enable input (active LOW)

E3

6

enable input (active HIGH)

GND

8

ground (0 V)

Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7

15, 14, 13, 12, 11, 10, 9, 7

output

VCC

16

supply voltage

6. Functional description

Table 3. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care

Input

Output

E1

E2

E3

A0

A1

A2

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

H

X

X

X

X

X

H

H

H

H

H

H

H

H

X

H

X

X

X

X

H

H

H

H

H

H

H

H

X

X

L

X

X

X

H

H

H

H

H

H

H

H

L

L

L

L

H

H

H

H

H

H

H

H

L

L

H

L

H

H

H

H

H

H

L

H

L

H

H

L

H

H

H

H

H

H

H

L

H

H

H

L

H

H

H

H

L

L

H

H

H

H

H

L

H

H

H

H

L

H

H

H

H

H

H

L

H

H

L

H

H

H

H

H

H

H

H

L

H

L

L

H

H

H

H

H

H

H

H

H

H

H

L

74LVC138A

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 8 — 20 September 2021

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