Nexperia

74HC390; 74HCT390

Dual decade ripple counter

4. Functional diagram

aaa-024291

Q0

÷2

÷5

CP0

CP1

1Q0

2Q0

1CP0

2CP0

1MR

2MR

1

15

1CP1

2CP1

4

12

2

14

3

13

Q1 1Q1

2Q1

5

11

Q3 1Q3

2Q3

7

9

Q2 1Q2

2Q2

6

10

MR

MR

Fig. 1. Logic symbol

aaa-024292

FF4

Q

CP

Q3

RD

Q2

Q1

Q0

FF3

Q

CP

RD

FF2

Q

CP

RD

FF1

MR

CP0

CP1

Q

CP

RD

Fig. 2. Logic diagram (one counter)

5. Pinning information

5.1. Pinning

74HC390

74HCT390

1CP0

VCC

1MR

2CP0

1Q0

2MR

1CP1

2Q0

1Q1

2CP1

1Q2

2Q1

1Q3

2Q2

GND

2Q3

aaa-024293

1

2

3

4

5

6

7

8

10

9

12

11

14

13

16

15

Fig. 3. Pin configuration for SOT109-1 (SO16)

74HC390

74HCT390

1CP0

VCC

1MR

2CP0

1Q0

2MR

1CP1

2Q0

1Q1

2CP1

1Q2

2Q1

1Q3

2Q2

GND

2Q3

aaa-024294

1

2

3

4

5

6

7

8

10

9

12

11

14

13

16

15

Fig. 4. Pin configuration for SOT403-1 (TSSOP16)

74HC_HCT390

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 5 — 18 October 2021

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