1/12
September 2001
s
LOW POWER CONSUMPTION : SPECIAL
CMOS OSCILLATOR CONFIGURATION
s
MONOSTABLE (one - shot) OR ASTABLE
(free-running) OPERATION
s
TRUE AND COMPLEMENTED BUFFERED
OUTPUTS
s
ONLY ONE EXTERNAL R AND C REQUIRED
s
BUFFERED INPUTS
s
QUIESCENT CURRENT SPECIFIED UP TO
20V
s
STANDARDIZED, SYMMETRICAL OUTPUT
CHARACTERISTICS
s
5V, 10V AND 15V PARAMETRIC RATINGS
s
INPUT LEAKAGE CURRENT
I
I
= 100nA (MAX) AT V
DD
= 18V T
A
= 25C
s
100% TESTED FOR QUIESCENT CURRENT
s
MEETS ALL REQUIREMENTS OF JEDEC
JESD13B " STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
DESCRIPTION
The HCF4047B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
The HCF4047B consist of a gatable astable
multivibrator with logic techniques incorporated to
permit positive or negative edge-triggered
monostable multivibrator action with retriggering
and external counting options. Inputs include
+TRIGGER -TRIGGER, ASTABLE, ASTABLE,
RETRIGGER, and EXTERNAL RESET. Buffered
outputs are Q, Q and OSCILLATOR. In all modes
of operation, an external capacitor must be
connected between C-Timing and RC-Common
terminals, and an external resistor must be
connected between the R-Timing and
RC-Common terminals.
For operating modes see functional terminal
connections and application notes.
HCF4047B
LOW POWER MONOSTABLE/ASTABLE MULTIVIBRATOR
PIN CONNECTION
ORDER CODES
PACKAGE
TUBE
T & R
DIP
HCF4047BEY
SOP
HCF4047BM1
HCF4047M013TR
DIP
SOP
HCF4047B
2/12
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
BLOCK DIAGRAM
PIN No
SYMBOL
NAME AND FUNCTION
1
C
External Capacitor
2
R
External Resistor
3
RC COM-
MON
External Connection to (1)
and (2)
4
ASTABLE
Complement Astable
Pulse
5
ASTABLE
True Astable Pulse
6
-TRIGGER
Negative Trigger Pulse
8
+TRIGGER
Positive Trigger Pulse
9
EXT. RESET External Reset
12
RETRIG-
GER
Retrigger Mode Pulse
13
OSC. OUT
Oscillator Output
10,11
Q, Q
Q Outputs
7
V
SS
Negative Supply Voltage
14
V
DD
Positive Supply Voltage
HCF4047B
3/12
FUNCTIONAL TERMINAL CONNECTIONS
* 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.
LOGIC DIAGRAM
FUNCTION*
TERMINAL CONNECTIONS
OUTPUT
PULSE
FROM
OUTPUT PERIOD OR
PULSE WIDTH
to V
DD
to V
SS
Input Pulse
to
Astable Multivibrator
Free Running
4, 5, 6, 14
7, 8, 9, 12
-
10, 11, 13
t
A
(10,11) = 4.40RC
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
t
A
(13) = 2.20RC
Monostable Multivibrator
Positive - Edge Trigger
4, 14
5, 6, 7, 9, 12
8
10, 11
Negative - Edge Trigger
4, 8, 14
5, 7, 9, 12
6
10, 11
Retriggerable
4, 14
5, 6, 7, 9
8, 12
10, 11
t
M
(10,11) = 2.48RC
External Countdown**
14
5, 6, 7, 8, 9,
12
-
10, 11
HCF4047B
4/12
DETAIL FOR FLIP-FLOPS FF1 AND FF3 (a) AND FOR FLIP-FLOPS FF2 AND FF4 (b)
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage values are referred to V
SS
pin voltage.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
DD
Supply Voltage
-0.5 to +22
V
V
I
DC Input Voltage
-0.5 to V
DD
+ 0.5
V
I
I
DC Input Current
10
mA
P
D
Power Dissipation per Package
200
mW
Power Dissipation per Output Transistor
100
mW
T
op
Operating Temperature
-55 to +125
C
T
stg
Storage Temperature
-65 to +150
C
Symbol
Parameter
Value
Unit
V
DD
Supply Voltage
3 to 20
V
V
I
Input Voltage
0 to V
DD
V
T
op
Operating Temperature
-55 to 125
C
HCF4047B
5/12
DC SPECIFICATIONS
The Noise Margin for both "1" and "0" level is: 1V min. with V
DD
=5V, 2V min. with V
DD
=10V, 2.5V min. with V
DD
=15V
Symbol
Parameter
Test Condition
Value
Unit
V
I
(V)
V
O
(V)
|I
O
|
(
A)
V
DD
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
I
L
Quiescent Current
0/5
5
0.01
1
30
30
A
0/10
10
0.01
2
60
60
0/15
15
0.01
4
120
120
0/20
20
0.02
20
600
600
V
OH
High Level Output
Voltage
0/5
<1
5
4.95
4.95
4.95
V
0/10
<1
10
9.95
9.95
9.95
0/15
<1
15
14.95
14.95
14.95
V
OL
Low Level Output
Voltage
5/0
<1
5
0.05
0.05
0.05
V
10/0
<1
10
0.05
0.05
0.05
15/0
<1
15
0.05
0.05
0.05
V
IH
High Level Input
Voltage
0.5/4.5
<1
5
3.5
3.5
3.5
V
1/9
<1
10
7
7
7
1.5/13.5
<1
15
11
11
11
V
IL
Low Level Input
Voltage
4.5/0.5
<1
5
1.5
1.5
1.5
V
9/1
<1
10
3
3
3
13.5/1.5
<1
15
4
4
4
I
OH
Output Drive
Current
0/5
2.5
<1
5
-1.36
-3.2
-1.15
-1.1
mA
0/5
4.6
<1
5
-0.44
-1
-0.36
-0.36
0/10
9.5
<1
10
-1.1
-2.6
-0.9
-0.9
0/15
13.5
<1
15
-3.0
-6.8
-2.4
-2.4
I
OL
Output Sink
Current
0/5
0.4
<1
5
0.44
1
0.36
0.36
mA
0/10
0.5
<1
10
1.1
2.6
0.9
0.9
0/15
1.5
<1
15
3.0
6.8
2.4
2.4
I
I
Input Leakage
Current
0/18
Any Input
18
10
-5
0.1
1
1
A
C
I
Input Capacitance
Any Input
5
7.5
pF
HCF4047B
6/12
DYNAMIC ELECTRICAL CHARACTERISTICS (T
amb
= 25C, C
L
= 50pF, R
L
= 200K
, t
r
= t
f
= 20 ns)
(*) Typical temperature coefficient for all V
DD
value is 0.3 %/C.
APPLICATION INFORMATION
1 - CIRCUIT DESCRIPTION
Astable operation is enabled by a high level on the
ASTABLE input. The period of the square wave at
the Q and Q Outputs in this mode of operation is a
function of the external components employed.
"True" input pulses on the ASTABLE input or
"Complement" pulses on the ASTABLE input
allow the circuit to be used as a gatable
multivibrator. The OSCILLATOR output period will
be half of the Q terminal output in the astable
mode. However, a 50% duty cycle is not
guaranteed at this output. In the monostable
mode, positive-edge triggering is accomplished by
application of a leading-edge pulse to the
+TRIGGER input and a low level to the -TRIGGER
input. For negative-edge triggering, a trailing-edge
pulse is applied to the -TRIGGER and a high level
is applied to the +TRIGGER. Input pulses may be
of any duration relative to the output pulse. The
multivibrator can be retriggered (on the leading
edge only) by applying a common pulse to both
the RETRIGGER and +TRIGGER inputs. In this
mode the output pulse remains high as long as the
input pulse period is shorter than the period
determined by the RC components. An external
countdown option can be implemented by
Symbol
Parameter
Test Condition
Value (*)
Unit
V
DD
(V)
Min.
Typ.
Max.
t
PLH
t
PHL
Propagation Delay
Time
Astable, Astable
to Osc. Out
5
200
400
ns
10
100
200
15
80
160
Astable, Astable
to Q, Q
5
350
700
10
175
350
15
125
250
+ or - Trigger to
Q, Q
5
500
1000
10
225
450
15
150
300
Retrigger to Q, Q
5
300
600
10
150
300
15
100
200
External Reset
to Q, Q
5
250
500
10
100
200
15
70
140
t
THL
t
TLH
Transition Time Osc. Out Q, Q
5
100
200
ns
10
50
100
15
40
80
t
W
Input Pulse Width
+ Trigger
- Trigger
5
200
400
ns
10
80
160
15
50
100
Reset
5
100
200
10
50
100
15
30
60
Retrigger
5
300
600
10
115
230
15
75
150
t
r
, t
f
Input Rise and Fall Time All Inputs
5
Unlimited
s
10
15
Q or Q Deviation from 50% Duty
Factor
5
0.5
1
%
10
0.5
1
15
0.1
0.5
HCF4047B
7/12
coupling "Q" to an external "N" counter and
resetting the counter with the trigger pulse. The
counter output pulse is fed back to the ASTABLE
input and has a duration equal to N times the
period of the multivibrator. A high level on the
EXTERNAL RESET input assures no output pulse
during an "ON" power condition. This input can
also be activated to terminate the output pulse at
any time. In the monostable mode, a high-level or
power-on reset pulse, must be applied to the
EXTERNAL RESET whenever V
DD
is applied.
2 - ASTABLE MODE
The following analysis presents worst-case
variations from unit-to-unit as a function of
transfer-voltage (VTR) shift (33% - 67% V
DD
) for
free-running (astable) operation.
ASTABLE MODE WAVEFORMS
Typ : V
TR
= 0.5 V
DD
t
A
= 4.40 RC
Min : V
TR
= 0.33 V
DD
t
A
= 4.62 RC
Max : V
TR
= 0.67 V
DD
t
A
= 4.62 RC
thus if t
A
= 4.40 RC is used, the maximum
variation will be (+ 5.0%, -0.0%)
In addition to variations from unit-to-unit, the
astable period may vary as a function of frequency
with respect to V
DD
and temperature.
3 - MONOSTABLE MODE
The following analysis presents worst-case
variations from unit-to-unit as a function of
transfer-voltage (V
TR
) shift (33% - 67% V
DD
) for
one-shot (monostable) operation.
MONOSTABLE WAVEFORMS
V
TR
t
1
= -RC In ----------
V
DD
+ V
TR
V
DD
- V
TR
t
2
= -RC In ----------
2V
DD
- V
TR
(V
TR
)(V
DD
- V
TR
)
t
3
= 2(t
1
+t
2
)= -2RC In ----------------------
(V
DD
+ V
TR
)(2V
DD
- V
TR
)
V
TR
t
1
= -RC In ------
2V
DD
V
DD
- V
TR
t
2
= -RC In ----------
2V
DD
- V
TR
(V
TR
)(V
DD
- V
TR
)
t
M
= (t
1
+t
2
)= -RC In ------------------
(2V
DD
- V
TR
)(2V
DD
)
HCF4047B
8/12
Where tM = monostable mode pulse width. Values
for tM are as follows :
Typ : V
TR
= 0.5 V
DD
t
M
= 2.48 RC
Min : V
TR
= 0.33 V
DD
t
M
= 2.71 RC
Max : V
TR
= 0.67 V
DD
t
M
= 2.48 RC
Thus if t
M
= 2.48 RC is used, the maximum
variation will be (+ 9.3%, - 0.0%).
Note : In the astable mode, the first positive half
cycle has a duration of T
M
; succeeding durations
are t
A
/2.
In addition to variations from unit to unit, the
monostable pulse width may vary as a function of
frequency with respect to V
DD
and temperature.
4 - RETRIGGER MODE
The HCF4047B can be used in the retrigger mode
to extend the output-pulse duration, or to compare
the frequency of an input signal with that of the
internal oscillator. In the retrigger mode the input
pulse is applied to terminals 8 and 12, and the
output is taken from terminal 10 or 11. As shown in
fig.A normal monostable action is obtained when
one retrigger pulse is applied. Extended pulse
duration is obtained when more than one pulse is
applied. For two input pulses, t
RE
= t
1
' + t
1
+ 2t
2
.
For more than two pulses, t
RE
(Q OUTPUT)
terminates at some variable time t
D
after the
termination of the last retrigger pulse. t
D
is variable
because t
RE
(Q OUTPUT) terminates after the
second positive edge of the oscillator output
appears at flip-flop 4 (see logic diagram).
FIGURE A : Retrigger-mode waveforms
5 - EXTERNAL COUNTER OPTION
Time t
M
can be extended by any amount with the
use of external counting circuitry. Advantages
include digitally controlled pulse duration, small
timing capacitors for long time periods, and
extremely fast recovery time.
A typical implementation is shown in fig. B. The
pulse duration at the output is
text = (N - 1) (t
A
) + (t
M
+ t
A
/2)
Where text = pulse duration of the circuitry, and N
is the number of counts used.
FIGURE B : Implementation of external counter option
HCF4047B
9/12
6 - POWER CONSUMPTION
In the standby mode (Monostable or Astable),
power dissipation will be a function of leakage
current in the circuit, as shown in the static
electrical characteristics. For dynamic operation,
the power needed to charge the external timing
capacitor C is given by the following formula :
Astable Mode :
P = 2CV
2
f. (Output at Pin 13)
P = 4CV
2
f. (Output at Pin 10 and 11)
(2.9CV
2
) (Duty Cycle)
Monostable Mode : P = --------------------
T
(Output at Pin 10 and 11)
The circuit is designed so that most of the total
power is consumed in the external components. In
practice, the lower the values of frequency and
voltage used, the closer the actual power
dissipation will be to the calculated value.
Because the power dissipation does not depend
on R, a design for minimum power dissipation
would be a small value of C. The value of R would
depend on the desired period (within the
limitations discussed above).
7 - TIMING-COMPONENT LIMITATIONS
The capacitor used in the circuit should be
non-polarized and have low leakage (i.e. the
parallel resistance of the capacitor should be an
order of magnitude greater than the external
resistor used). Three is no upper or lower limit for
either R or C value to maintain oscillation.
However, in consideration of accuracy, C must be
much larger than the inherent stray capacitance in
the system (unless this capacitance can be
measured and taken into account). R must be
much larger than the COS/MOS "ON" resistance
in series with it, which typically is hundreds of
ohms. In addition, with very large values of R,
some short-term instability with respect to time
may be noted.
The recommended values for these components
to maintain agreement with previously calculated
formulas without trimming should be :
C > 100pF, up to any practical value, for astable
modes ;
C > 1000pF, up to any practical value, for
monostable modes.
10K
< R < 1M
.
TEST CIRCUIT
C
L
= 50pF or equivalent (includes jig and probe capacitance)
R
L
= 200K
R
T
= Z
OUT
of pulse generator (typically 50
)
HCF4047B
10/12
DIM.
mm.
inch
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
a1
0.51
0.020
B
1.39
1.65
0.055
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
15.24
0.600
F
7.1
0.280
I
5.1
0.201
L
3.3
0.130
Z
1.27
2.54
0.050
0.100
Plastic DIP-14 MECHANICAL DATA
P001A
HCF4047B
11/12
DIM.
mm.
inch
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
1.75
0.068
a1
0.1
0.2
0.003
0.007
a2
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45 (typ.)
D
8.55
8.75
0.336
0.344
E
5.8
6.2
0.228
0.244
e
1.27
0.050
e3
7.62
0.300
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
0.68
0.026
S
8 (max.)
SO-14 MECHANICAL DATA
PO13G
HCF4047B
12/12
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
2001 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco
Singapore - Spain - Sweden - Switzerland - United Kingdom
http://www.st.com
PDF 
ZIP