HCF4047B datasheet(2/15 Pages) STMICROELECTRONICS

部件名	HCF4047B

功能描述	LOW-POWELOW-POWER MONOSTABLE/ASTABLE MULTIVIBRATOR

PDF	15 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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2 / 15 page

BLOCK DIAGRAM

FUNCTIONAL TERMINAL CONNECTIONS

Terminal Connections

Function*

to VDD

to VSS

Input

Pulse to

Output

Pulse

From

Output Period

Pulse Width

Astable Multivibrator :

Free Running

True Gating

Complement Gating

4, 5, 6, 14

4, 6, 14

6, 14

7, 8, 9, 12

5, 7, 8, 9 ,12

–

10, 11, 13

tA (10, 11) = 4.40RC

tA (13) = 2.20RC

Monostable Multivibrator :

Positive–Edge Trigger

Negative–Edge Trigger

Retriggerable

External Countdown**

4, 14

4, 8, 14

4, 14

5, 6, 7, 9, 12

5, 7, 9, 12

5, 6, 7, 9

5, 6, 7, 8, 9, 12

8, 12

–

10, 11

tM (10, 11) = 2.48RC

* In all cases external capacitor and resistor between pins, 1, 2 and 3 (see logic diagrams).

Input pulse to Reset of External Counting Chip.

External Counting Chip Output to pin 4.

HCC/HCF4047B

2/15

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