CD4047BC Datasheet, PDF (2/9 Pages) Fairchild Semiconductor – Low Power Monostable/Astable Multivibrator

Connection Diagram
Pin Assignments for SOIC and DIP
Top View
Function Table
Terminal Connections
Function
To V_DD
To V_SS
Input Pulse
To
Astable Multivibrator
Free-Running
4, 5, 6, 14
7, 8, 9, 12
True Gating
4, 6, 14
7, 8, 9, 12
5
Complement Gating
6, 14
5, 7, 8, 9, 12 4
Monostable Multivibrator
Positive-Edge Trigger
4, 14
5, 6, 7, 9, 12 8
Negative-Edge Trigger
4, 8, 14
5, 7, 9, 12
6
Retriggerable
4, 14
5, 6, 7, 9
8, 12
External Countdown (Note 1) 14
5, 6, 7, 8, 9, 12 Figure 1
Output Pulse
From
Typical Output
Period or
Pulse Width
10, 11, 13
10, 11, 13
10, 11, 13
t_A(10, 11) = 4.40 RC
t_A (13) = 2.20 RC
10, 11
10, 11
10, 11
Figure 1
t_M (10, 11) = 2.48 RC
Figure 1
Note 1: External resistor between terminals 2 and 3. External capacitor between terminals 1 and 3.
Typical Implementation of External Countdown Option
t_EXT = (N − 1) t_A + (t_M + t_A/2)
FIGURE 1.
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