7-903

CD4047BMS

TABLE 9. FUNCTIONAL TERMINAL CONNECTIONS

In all cases External resistor between terminals 2 and 3 (Note 1)

External capacitor between terminals 1 and 3 (Note 1)

FUNCTION

TERMINAL CONNECTIONS

OUTPUT PULSE

FROM

OUTPUT PERIOD OR PULSE

WIDTH

TO VDD

TO VSS

INPUT TO

ASTABLE MULTIVIBRATOR

Free Running

4, 5, 6, 14

7, 8, 9, 12

-

10, 11, 13

True Gating

4, 6, 14

7, 8, 9, 12

5

10, 11, 13

Complement Gating

6, 14

5, 7, 8, 9, 12

4

10, 11, 13

MONOSTABLE MULTIVIBRATOR

Positive Edge Trigger

4, 14

5, 6, 7, 9, 12

8

10, 11

tM (10, 11) = 2.48 RC

Negative Edge Trigger

4, 8, 14

5, 7, 9, 12

6

10, 11

Retriggerable

4, 14

5, 6, 7, 9

8, 12

10, 11

External Countdown (Note 3)

14

5, 6, 7, 8, 9, 12

-

10, 11

NOTES:

1. See text.

3. Input Pulse to Reset of External Counting Chip External Counting Chip Output to Terminal 4.

Logic Diagrams

FIGURE 1. CD4047BMS LOGIC BLOCK DIAGRAM

Q

Q

10

11

OSCILLATOR OUT

LOW POWER

ASTABLE

MULTIVIBRATOR

FREQUENCY

DIVIDER (

÷2)

ASTABLE

GATE

CONTROL

MONOSTABLE

CONTROL

RETRIGGER

CONTROL

13

2

1

3

R-TIMING

C-TIMING

RC

COMMON

R

C

-TRIGGER

ASTABLE

+TRIGGER

RETRIGGER

EXTERNAL

RESET

ASTABLE

12

9

8

6

4

5