3 Pin Configuration and Functions

Figure 3-1. CDx4AC/ACT374, CD74AC534

Figure 3-2. CDx4AC/ACT374, CD74AC534

Table 3-1. Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NO.

OE

1

I

Enable pin

1Q

2

O

Output 1

1D

3

I

Input 1

2D

4

I

Input 2

2Q

5

O

Output 2

3Q

6

O

Output 3

3D

7

I

Input 3

4D

8

I

Input 4

4Q

9

O

Output 4

GND

10

–

Ground pin

CLK

11

I

Clock pin

5Q

12

O

Output 5

5D

13

I

Input 5

6D

14

I

Input 6

6Q

15

O

Output 6

7Q

16

O

Output 7

7D

17

I

Input 7

8D

18

I

Input 8

8Q

19

O

Output 8

VCC

20

–

Power pin

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CD74AC374, CD54AC374, CD54ACT374, CD74ACT374, CD74AC534

SCHS290A – DECEMBER 1998 – REVISED MARCH 2024

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