MC74HC390A Ver la hoja de datos (PDF) - ON Semiconductor

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MC74HC390A

Dual 4−Stage Binary Ripple Counter with ÷2 and ÷5 Sections

ON Semiconductor 

MC74HC390A

TEST CIRCUIT

TEST POINT

OUTPUT

DEVICE

UNDER

TEST

CL*

*Includes all probe and jig capacitance

Figure 5.

EXPANDED LOGIC DIAGRAM

CLOCK A 1, 15

CQ

DRQ

3, 13 QA

CLOCK B 4, 12

CQ

DQ

R

5, 11 QB

CQ

DRQ

6, 10 QC

RESET 2, 14

C

DRQ

7, 9 QD

TIMING DIAGRAM

(QA Connected to Clock B)

0

1

2

3

4

5

6

78

9

0

1

2

3

4

5

6

CLOCK A

RESET

QA

QB

QC

QD

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6

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