CD4047BM Datasheet PDF - National Semiconductor
| Part Number | CD4047BM | |
| Description | Low Power Monostable/Astable Multivibrator | |
| Manufacturers | National Semiconductor | |
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October 1993
CD4047BM CD4047BC Low Power
Monostable Astable Multivibrator
General Description
CD4047B is capable of operating in either the monostable
or astable mode It requires an external capacitor (between
pins 1 and 3) and an external resistor (between pins 2 and
3) to determine the output pulse width in the monostable
mode and the output frequency in the astable mode
Astable operation is enabled by a high level on the astable
input or low level on the astable input The output frequency
(at 50% duty cycle) at Q and Q outputs is determined by the
timing components A frequency twice that of Q is available
at the Oscillator Output a 50% duty cycle is not guaranteed
Monostable operation is obtained when the device is trig-
gered by low-to-high transition at a trigger input or high-to-
low transition at b trigger input The device can be retrig-
gered by applying a simultaneous low-to-high transition to
both the a trigger and retrigger inputs
A high level on Reset input resets the outputs Q to low Q to
high
Features
Y Wide supply voltage range
Y High noise immunity
Y Low power TTL
compatibility
3 0V to 15V
0 45 VDD (typ )
Fan out of 2 driving 74L
or 1 driving 74LS
SPECIAL FEATURES
Y Low power consumption special CMOS oscillator con-
figuration
Y Monostable (one-shot) or astable (free-running) opera-
tion
Y True and complemented buffered outputs
Y Only one external R and C required
MONOSTABLE MULTIVIBRATOR FEATURES
Y Positive- or negative-edge trigger
Y Output pulse width independent of trigger pulse dura-
tion
Y Retriggerable option for pulse width expansion
Y Long pulse widths possible using small RC components
by means of external counter provision
Y Fast recovery time essentially independent of pulse
width
Y Pulse-width accuracy maintained at duty cycles ap-
proaching 100%
ASTABLE MULTIVIBRATOR FEATURES
Y Free-running or gatable operating modes
Y 50% duty cycle
Y Oscillator output available
Y Good astable frequency stability
typical
e g2% a 0 03% C 100 kHz
frequency e g0 5% a 0 015% C 10 kHz
deviation (circuits trimmed to frequency
VDD e 10V g10%)
Applications
Y Frequency discriminators
Y Timing circuits
Y Time-delay applications
Y Envelope detection
Y Frequency multiplication
Y Frequency division
Block and Connection Diagrams
Dual-In-Line Package
C1995 National Semiconductor Corporation TL F 5969
TL F 5969 – 1
Top View
TL F 5969 – 2
Order Number CD4047B
RRD-B30M105 Printed in U S A
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Typical Performance Characteristics
Typical Q Q Osc Out Period
Accuracy vs Supply Voltage
(Astable Mode Operation)
Typical Q Q Pulse Width
Accuracy vs Supply Voltage
Monostable Mode Operation
fQ Q
A 1000 kHz
B 100 kHz
C 10 kHz
D 1 kHz
E 100 Hz
R
22k
22k
220k
220k
2 2M
TL F 5969 – 5
C
10 pF
100 pF
100 pF
1000 pF
1000 pF
Typical Q Q and Osc Out
Period Accuracy vs Temperature
Astable Mode Operation
tM
A 2 ms
B 7 ms
C 60 ms
D 550 ms
E 5 5 ms
R
22k
22k
220k
220k
2 2M
TL F 5969 – 6
C
10 pF
100 pF
100 pF
1000 pF
1000 pF
Typical Q and Q Pulse Width
Accuracy vs Temperature
Monostable Mode Operation
fQ Q
A 1000 kHz
B 100 kHz
C 10 kHz
D 1 kHz
R
22k
22k
220k
220k
Timing Diagram
Astable Mode
TL F 5969 – 7
C
10 pF
100 pF
100 pF
1000 pF
tM
A 2 ms
B 7 ms
C 60 ms
D 550 ms
R
22k
22k
220k
220k
TL F 5969 – 8
C
10 pF
100 pF
100 pF
1000 pF
Monostable Mode
TL F 5969 – 9
Retrigger Mode
TL F 5969 – 10
TL F 5969 – 11
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CD4047BM electronic component. |
| Information | Total 6 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CD4047BM.PDF Datasheet ] | |
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