5 Pin Configuration and Functions

1

2

3

7

4

5

6

14

13

12

8

11

18

17

GND

7Q

6D

5D

V

CC

15

16

1Q

1D

CLR

3Q

3D

CLK

6Q

5Q

2Q

2D

10

9

4D

4Q

8D

8Q

7D

20

19

PW or DGS Package

20-Pin TSSOP or VSSOP

(Top View)

VCC

CLK

GND

1Q

1D

2D

2Q

3Q

3D

4D

4Q

CLR

8Q

8D

7D

7Q

6Q

6D

5D

5Q

1

20

10

11

2

3

4

5

6

7

8

9

12

13

14

15

16

17

18

19

PAD

RKS Package

20-Pin VQFN

(Top View)

Table 5-1. Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NO.

CLR

1

Input

Clear for all channels, active low

1Q

2

Output

Output for channel 1

1D

3

Input

Input for channel 1

2D

4

Input

Input for channel 2

2Q

5

Output

Output for channel 2

3Q

6

Output

Output for channel 3

3D

7

Input

Input for channel 3

4D

8

Input

Input for channel 4

4Q

9

Output

Output for channel 4

GND

10

—

Ground

CLK

11

Input

Clock for all channels, rising edge triggered

5Q

12

Output

Output for channel 5

5D

13

Input

Input for channel 5

6D

14

Input

Input for channel 6

6Q

15

Output

Output for channel 6

7Q

16

Output

Output for channel 7

7D

17

Input

Input for channel 7

8D

18

Input

Input for channel 8

8Q

19

Output

Output for channel 8

VCC

20

—

Postive supply

Thermal Pad(1)

—

The thermal pad can be connect to GND or left floating. Do not connect to any other signal

or supply.

(1)

RKS package only.

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SN74HCS273

SCLS851D – MARCH 2021 – REVISED JANUARY 2023

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