HCC4047B Datasheet, PDF (2/15 Pages) STMicroelectronics – LOW-POWELOW-POWER MONOSTABLE/ASTABLE MULTIVIBRATOR

HCC/HCF4047B
BLOCK DIAGRAM
FUNCTIONAL TERMINAL CONNECTIONS
Function*
Terminal Connections
to V_DD
to V_SS
Input
Pulse to
Output
Pulse
From
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
Negative–Edge Trigger
Retriggerable
External Countdown**
4, 14
4, 8, 14
4, 14
14
5, 6, 7, 9, 12
5, 7, 9, 12
5, 6, 7, 9
5, 6, 7, 8, 9, 12
8
6
8, 12
–
10, 11
10, 11
10, 11
10, 11
* 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.
Output Period
or
Pulse Width
t_A (10, 11) = 4.40RC
t_A (13) = 2.20RC
t_M (10, 11) = 2.48RC
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