Nexperia

74HC393; 74HCT393

Dual 4-bit binary ripple counter

4. Functional diagram

001aad532

1CP

1

1

2

6

5

3

4

1MR

1Q0

1Q1

1Q2

1Q3

2CP

2

13

12

8

9

11

10

2MR

2Q0

2Q1

2Q2

2Q3

Fig. 1. Logic symbol

001aad533

CT = 0

CT

12

13

8

9

11

10

+

0

3

CT = 0

CT

2

1

6

5

3

4

+

0

3

CTR4

CTR4

Fig. 2. IEC logic symbol

001aad534

1CP

4-BIT

BINARY

RIPPLE

COUNTER

4-BIT

BINARY

RIPPLE

COUNTER

1

2

6

5

3

4

1MR

1Q0

1Q1

1Q2

1Q3

2CP

13

12

8

9

11

10

2MR

2Q0

2Q1

2Q2

2Q3

Fig. 3. Functional diagram

001aad535

0

15

14

13

12

1

2

3

4

5

6

7

11

10

9

8

Fig. 4. State diagram

001aad536

RD

FF

1

T

CP

Q

MR

RD

FF

2

T

Q

RD

FF

3

T

Q

RD

FF

4

T

Q

Q0

Q1

Q2

Q3

Fig. 5. Logic diagram (one counter)

74HC_HCT393

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 8 — 22 October 2021

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