HCF4047B
LOW POWER MONOSTABLE/ASTABLE MULTIVIBRATOR
■ LOW POWER CONSUMPTION : SPECIAL
CMOS OSCILLATOR CONFIGURATION
■
MONOSTABLE (one - shot) OR ASTABLE
(free-running) OPERATION
■
■
■
■
TRUE AND COMPLEMENTED BUFFERED
OUTPUTS
ONLY ONE EXTERNAL R AND C REQUIRED
BUFFERED INPUTS
QUIESCENT CURRENT SPECIFIED UP TO
20V
■
■
■
■
■
STANDARDIZED, SYMMETRICAL OUTPUT
CHARACTERISTICS
5V, 10V AND 15V PARAMETRIC RATINGS
INPUT LEAKAGE CURRENT
I
I
= 100nA (MAX) AT V
DD
= 18V T
A
= 25°C
100% TESTED FOR QUIESCENT CURRENT
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
DIP SOP
ORDER CODES
PACKAGE
DIP
SOP
TUBE
HCF4047BEY
HCF4047BM1
T & R
HCF4047M013TR 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.
PIN CONNECTION
September 2001 1/12
HCF4047B
INPUT EQUIVALENT CIRCUIT
4
8
9
5
6
12
13
10,11
7
14
PIN DESCRIPTION
PIN No
1
2
3
SYMBOL NAME AND FUNCTION
C
R
RC COM-
MON
ASTABLE
External Capacitor
External Resistor
External Connection to (1) and (2)
Complement Astable
Pulse
ASTABLE True Astable Pulse
-TRIGGER Negative Trigger Pulse
+TRIGGER Positive Trigger Pulse
EXT. RESET External Reset
RETRIG-
GER
Retrigger Mode Pulse
OSC. OUT Oscillator Output
Q, Q
V
SS
V
DD
Q Outputs
Negative Supply Voltage
Positive Supply Voltage
BLOCK DIAGRAM
2/12
HCF4047B
FUNCTIONAL TERMINAL CONNECTIONS
FUNCTION* to V
TERMINAL CONNECTIONS
DD to V
SS
Input Pulse to
OUTPUT
PULSE
FROM
Astable Multivibrator
Free Running
True Gating
Complement Gating
4, 5, 6, 14
4, 6, 14
6, 14
7, 8, 9, 12
7, 8, 9, 12
5, 7, 8, 9, 12
-
5
4
10, 11, 13
10, 11, 13
10, 11, 13
Monostable Multivibrator
Positive - Edge Trigger
Negative - Edge Trigger
Retriggerable
4, 14
4, 8, 14
4, 14
5, 6, 7, 9, 12
5, 7, 9, 12
5, 6, 7, 9
8
6
8, 12
10, 11
10, 11
10, 11
External Countdown** 14 5, 6, 7, 8, 9,
12
-
* 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.
10, 11
LOGIC DIAGRAM
OUTPUT PERIOD OR
PULSE WIDTH t
A
(10,11) = 4.40RC
t
A
(13) = 2.20RC
t
M
(10,11) = 2.48RC
3/12
HCF4047B
DETAIL FOR FLIP-FLOPS FF1 AND FF3 (a) AND FOR FLIP-FLOPS FF2 AND FF4 (b)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
DD
V
I
I
I
P
D
Supply Voltage
DC Input Voltage
DC Input Current
Power Dissipation per Package
Power Dissipation per Output Transistor
-0.5 to +22
-0.5 to V
±
DD
10
200
100
+ 0.5
V
V mA mW mW
T op
T stg
Operating Temperature
Storage Temperature
-55 to +125
-65 to +150
°C
°C
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
Parameter Symbol
V
DD
V
I
T op
Supply Voltage
Input Voltage
Operating Temperature
Value
3 to 20
0 to V
DD
-55 to 125
Unit
V
V
°C
4/12
HCF4047B
DC SPECIFICATIONS
Test Condition Value
Symbol
V
V
I
V
I
I
V
L
OH
OL
IH
IL
OH
OL
Parameter
High Level Output
Voltage
Low Level Output
Voltage
High Level Input
Voltage
Low Level Input
Voltage
Output Drive
Current
Output Sink
Current
V
I
(V)
Quiescent Current 0/5
0/10
0/15
0/20
0/5
0/10
0/15
5/0
10/0
15/0
0/5
0/5
0/10
0/15
0/5
0/10
0/15
V
O
(V)
<1 5 4.95
<1 10 9.95
<1 15 14.95
<1
<1
5
10
3.5
7
11
0.05
0.05
0.05
<1 15
0.5/4.5
<1 5
1/9 <1 10
1.5/13.5
<1 15
4.5/0.5
<1 5
9/1 <1 10
13.5/1.5
<1 15
2.5
4.6
9.5
<1 5 -1.36
-3.2
<1 5 -0.44
-1
<1 10 -1.1
-2.6
13.5
0.4
0.5
1.5
|I
O
|
(
µ
A)
V
DD
(V)
5
10
15
20
T
A
= 25°C
0.01
0.01
0.01
0.02
<1 15 -3.0
-6.8
<1 5 0.44
1
<1 10
<1 15
1.1
3.0
2.6
6.8
1
2
4
20
1.5
3
4
-40 to 85°C
4.95
9.95
14.95
3.5
7
11
-1.15
-0.36
-0.9
-2.4
0.36
0.9
2.4
30
60
120
600
0.05
0.05
0.05
1.5
3
4
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
4.95
9.95
14.95
3.5
I
I
C
I
Input Leakage
Current
Input Capacitance
0/18 Any Input
Any Input
18 ±
10
5
-5 ±
0.1
7.5
±
1
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
7
11
-1.1
-0.36
-0.9
-2.4
0.36
0.9
2.4
30
60
120
600
0.05
0.05
0.05
1.5
±
3
4
1
Unit
µ
A
V
V
V
V mA mA
µ
A pF
5/12
HCF4047B
DYNAMIC ELECTRICAL CHARACTERISTICS (T amb
= 25°C, C
L
= 50pF, R
L
= 200K
Ω
, t r
= t f
= 20 ns)
Test Condition Value (*) Unit t t
Symbol
PLH
THL t r t
t
t
W
, t
PHL
TLH f
Propagation Delay
Time
Astable, Astable to Osc. Out
External Reset to Q, Q
Q or Q Deviation from 50% Duty
Factor
Parameter
Transition Time Osc. Out Q, Q
Input Pulse Width
Astable, Astable to Q, Q
+ or - Trigger to
Q, Q
Retrigger to Q, Q
+ Trigger
- Trigger
Reset
Retrigger
Input Rise and Fall Time All Inputs
V
DD
(V)
15
5
10
15
15
5
10
5
10
15
5
10
15
5
10
15
5
10
5
10
15
5
10
5
10
15
5
10
15
15
5
10
15
(*) 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
6/12
Min.
Typ.
Max.
100 200
50
40
100
80
200 400
80 160
50 100
100 200
50 100
30 60
300 600
115 230
75 150
200 400
100 200
80 160
350 700
175 350
125 250
500 1000
225 450
150 300
300 600
150 300
100 200
250 500
100 200
70 140
Unlimited
±
0.5
±
1
±
0.5
±
1
±
0.1
±
0.5
ns ns ns
µ s
% 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
HCF4047B 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
ASTABLE MODE WAVEFORMS 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 free-running (astable) operation.
) for t
V
V
DD
TR
+ V
TR t
V
DD
- V
2V
DD
- V
TR
(V t
3
= 2(t
1
+t
2
DD
TR
)(V
DD
+ V
TR
- V
)(2V
TR
DD
)
- V
TR
)
Typ : V
Min : V
TR
Max : V
TR
TR thus if t
A
= 0.5 V
DD
t
A
= 0.33 V
DD
= 0.67 V
DD
t
A
= 4.62 RC
t
= 4.40 RC
A
= 4.62 RC
= 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.
MONOSTABLE WAVEFORMS
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 one-shot (monostable) operation.
) for t
V
2V
TR
DD t
V
2
= -RC In —————
2V
DD
- V
TR
- V
TR t
(V
(2V
TR
DD
)(V
- V
DD
TR
- V
TR
)(2V
)
DD
)
7/12
HCF4047B
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
/2.
; succeeding durations are t
A
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
FIGURE A : Retrigger-mode waveforms 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).
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
8/12
HCF4047B
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
P = 4CV
2
2 f. (Output at Pin 13) f. (Output at Pin 10 and 11)
2
(2.9CV
) (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
TEST CIRCUIT
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
Ω
< R < 1M
Ω
.
C
R
R
L
L
= 50pF or equivalent (includes jig and probe capacitance)
= 200K
Ω
T
= Z
OUT
of pulse generator (typically 50
Ω
)
9/12
HCF4047B
DIM.
I
L
Z e e3
F a1
B
D
E b b1
MIN.
0.51
1.39
1.27
Plastic DIP-14 MECHANICAL DATA
mm.
TYP MAX.
1.65
MIN.
0.020
0.055
inch
TYP.
0.5
0.25
0.020
0.010
20
8.5
2.54
15.24
0.335
0.100
0.600
7.1
5.1
3.3
0.130
2.54
0.050
MAX.
0.065
0.787
0.280
0.201
0.100
P001A
10/12
DIM.
E e e3
C c1
D
A a1 a2 b b1
M
S
F
G
L
HCF4047B
MIN.
0.1
0.35
0.19
8.55
5.8
3.8
4.6
0.5
SO-14 MECHANICAL DATA
mm.
TYP MIN.
MAX.
1.75
0.2
1.65
0.46
0.25
0.003
0.013
0.007
0.5
8.75
6.2
45° (typ.)
0.336
0.228
1.27
7.62
4.0
5.3
1.27
0.68
8° (max.)
0.149
0.181
0.019
inch
TYP.
0.019
0.050
0.300
0.344
0.244
0.157
0.208
0.050
0.026
MAX.
0.068
0.007
0.064
0.018
0.010
PO13G
11/12
HCF4047B
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.
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