3 Pin Configuration and Functions

Figure 3-1. CDx4AC/ACT574 DW Package, 20-Pin SOIC; N Package, 20-Pin PDIP (Top View)

Table 3-1. Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NO.

OE

1

I

Active low enable

1Q

2

O

Data output

1D

3

I

Data input

2D

4

I

Data input

2Q

5

O

Data output

3Q

6

O

Data output

3D

7

I

Data input

4D

8

I

Data input

4Q

9

O

Data output

GND

10

-

Ground pin

CLK

11

I

Clock pin

5Q

12

O

Data output

5D

13

I

Data input

6D

14

I

Data input

6Q

15

O

Data output

7Q

16

O

Data output

7D

17

I

Data input

8D

18

I

Data input

8Q

19

O

Data output

VCC

20

-

Power pin

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CD54AC574, CD74AC574, CD54ACT574, CD74ACT574

SCHS292A – DECEMBER 1998 – REVISED MAY 2024

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