January 1995

5

Philips Semiconductors

Product specification

Monostable/astable multivibrator

HEF4047B

MSI

FUNCTIONAL CONNECTIONS

Notes

1. Input pulse to RESET of external counting chip; external counting chip output to pin 4.

2. In all cases, external resistor between pins 2 and 3, external capacitor between pins 1 and 3.

DC CHARACTERISTICS

FUNCTION

PINS CONNECTED TO

OUTPUT

PULSE

FROM

PINS

OUTPUT

PERIOD

OR

PULSE WIDTH

INPUT

PULSE

astable multivibrator

free running

4, 5, 6, 14

7, 8, 9, 12

−

10, 11, 13

at pins 10, 11:

true gating

4, 6, 14

7, 8, 9, 12

5

10, 11, 13

at pin 13:

complement gating

6, 14

5, 7, 8, 9, 12

4

10, 11, 13

monostable multivibrator

pos. edge-triggering

4, 14

5, 6, 7, 9, 12

8

10, 11

neg. edge-triggering

4, 8, 14

5, 7, 9, 12

6

10, 11

at pins 10, 11:

retriggerable

4, 14

5, 6, 7, 9

8, 12

10, 11

14

5, 6, 7, 8, 9, 12

−

10, 11

V

SYMBOL

−40

+ 25

+ 85

MAX.

MIN.

MAX.

MAX.

Leakage current

15

0,3

−

0,3

1

µA

pin 3 at

pin 3; output

transistor OFF