Document Outline
- COVER
- TYPICAL CHARACTERISTICS
- FEATURES
- ORDERING INFORMATION
- PIN CONFIGURATION (TOP VIEW)
- EQUIVALENT CIRCUIT
- ABSOLUTE MAXIMUM RATINGS (TA = 25 degrees)
- RECOMMENDED OPERATING CONDITIONS (TA = 25 degrees)
- ELECTRICAL CHARACTERISTICS (TA = 25 degrees, VCC = 5 to 15 V)
- CHARACTERISTIC CURVES (TA = 25 degrees, TYP.)
- PIN FUNCTIONS
- APPLICATION CIRCUITS
- RECOMMENDED SOLDERING CONDITIONS
- REFERENCE
1986
The
PC1555 is a powerful integrated circuit. Adding a few external parts to it can turn it into various types of
timing signal generators, such as monostable and astable multivibrators. It has trigger, threshold, and control pins.
Inputting a signal to the reset pin can stop the circuit operation easily. In addition, the output can sink current as high
as 200 mA (maximum). So, it can be used to drive relays and lamps.
TYPICAL CHARACTERISTICS
FEATURES
Supply voltage
: 4.5 to 16 V
Monostable and astable oscillation
Circuit current (V
CC
= 5 V) : 3 mA
Interfacing directly with TTL-level signals
Output current capacity
: 200 mA
Variable duty cycle
Temperature stability
: 0.005%/
C
Rising and falling time
: 100 ns
ORDERING INFORMATION
PIN CONFIGURATION (TOP VIEW)
Part number
Package
PC1555C
8-pin plastic DIP (300 mil)
PC1555G2 8-pin plastic SOP (225 mil)
EQUIVALENT CIRCUIT
DATA SHEET
Document No.
G10649EJ6V0DS00 (6th edition)
(Previous No. IC-1979)
Date Published November 1995 P
Printed in Japan
TIMER CIRCUIT
MOS INTEGRATED CIRCUIT
Bipolar Analog Integrated Circuit
PC1555
1
GND
Trigger
Output
Reset
V
CC
Discharge
Threshold
Control voltage
2
3
4
8
7
R
COMP
COMP
R
R
V
REF
6
5
Flip-flop
Output
stage
V
CC
R
2
8
6
5
2
(3V
CC
)
1
2
4
7
GND
Q
5
R
4
R
5
Q
11
Q
6
Q
3
Q
2
Q
8
Q
15
Q
22
Q
27
Q
18
Q
19
Q
20
Q
23
Q
26
Q
16
Q
21
Q
17
Q
24
Q
28
Q
7
Q
12
Q
25
Q
14
Q
13
Q
10
Q
9
Q
1
Q
4
1 k
R
3
5 k
R
7
4.7 k
R
8
100
3.3k
R
10
120
R
6
7.5k
R
11
6.2
k
R
12
3
3.9
k
R
1
10 k
5 k
5 k
Output
Threshold
Control
Trigger
Reset
Discharge
R
9
2
PC1555
ABSOLUTE MAXIMUM RATINGS (T
A
= 25
C)
Notes 1. Be sure to use the product within the Power dissipation.
2. For T
A
25
C, the total loss is derated at T
J
MAX
= 125
C and 6 mW/
C.
(See the P
T
-T
A
characteristic curve.)
3. For T
A
25
C, the total loss is derated at T
J
MAX
= 125
C and 4.4 mW/
C.
(See the P
T
-T
A
characteristic curve.)
4. This is an external voltage that can be applied to the output pin without deteriorating the quality of the
product or causing damage to the product.
Be sure to use the product within the rated value under any conditions where coils are inserted or power
is turned on or off. The output voltage that can be obtained during normal operation is within the output
saturation voltage range.
RECOMMENDED OPERATING CONDITIONS (T
A
= 25
C)
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
Supply voltage
V
CC
4.5
16
V
Oscillation frequency
f
V
CC
= 5 to 15 V
0.1
100 k
Hz
Output pulse width
t
W (OUT)
V
CC
= 5 to 15 V
10
10
Sec
Input voltage (trigger, threshold)
V
IN
0
V
CC
V
Input voltage
Note 5
(control)
V
IN
3.0
V
CC
1.5
V
Reset voltage (high level)
V
reset H
V
CC
= 5 to 15 V
1.0
V
CC
V
Reset voltage (low level)
V
reset L
V
CC
= 5 to 15 V
0
0.4
V
Note 5.
This parameter defines the voltage that can be applied when a PWM mode application circuit is
configured by applying an external voltage to the control pin. Usually, a capacitance of 0.01
F is
connected as shown in the application circuit.
Rated value
Parameter
Symbol
PC1555C
PC1555G
Unit
Supply voltage
V
CC
0.3 to +18
0.3 to +18
V
Input voltage
V
IN
0.3 to V
CC
+ 0.3
0.3 to V
CC
+ 0.3
V
(trigger, threshold, reset, control)
Applicable output voltage
Note 4
V
O
0.3 to V
CC
+ 0.3
0.3 to V
CC
+ 0.3
V
(output and discharge)
Output current
I
O
200
Note 1
200
Note 1
mA
Power dissipation
P
T
600
Note 2
440
Note 3
mW
Operating temperature
T
A
20 to +80
20 to +80
C
Storage temperature
T
stg
55 to +125
55 to +125
C
3
PC1555
ELECTRICAL CHARACTERISTICS (T
A
= 25
C, V
CC
= 5 to 15 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Supply voltage
V
CC
4.5
16
V
Supply current
I
CC
V
CC
= 5 V, R
L
=
, V
O
= "L"
Note 6
0
3
6
mA
V
CC
= 15 V, R
L
=
, V
O
= "L"
Note 6
0
10
15
mA
Threshold voltage
V
th
2/3 V
CC
V
Threshold current
I
th
Note 7
0
0.1
0.25
A
Trigger voltage
V
tr
V
CC
= 15 V
5
V
V
CC
= 5 V
1.67
V
Trigger current
I
tr
0.5
A
Reset voltage
V
reset
Note 8
0.4
0.7
1.0
V
Reset current
I
reset
0.1
mA
Control voltage
V
cont
V
CC
= 15 V
9.0
10
11
V
V
CC
= 5 V
2.6
3.33
4
V
Output saturation voltage "L"
V
OL
V
CC
= 15 V, I
SINK
= 10 mA
0
0.1
0.25
V
V
CC
= 15 V, I
SINK
= 50 mA
0
0.4
0.75
V
V
CC
= 15 V, I
SINK
= 100 mA
0
2.0
2.5
V
V
CC
= 15 V, I
SINK
= 200 mA
2.5
V
V
CC
= 5 V, I
SINK
= 5 mA
0
0.1
0.35
V
Output saturation voltage "H"
V
OH
V
CC
= 15 V, I
SOURCE
= 200 mA
12.5
V
V
CC
= 15 V, I
SOURCE
= 100 mA
12.75
13.3
15.0
V
V
CC
= 5 V, I
SOURCE
= 100 mA
2.75
3.3
5.0
V
Propagation delay (L
H)
t
PLH
200
ns
Propagation delay (H
L)
t
PHL
200
ns
Minimum trigger pulse width
t
W (tr)
V
CC
= 15 V, V
tr min.
= 2.5 V
25
ns
Minimum output pulse width
t
W (OUT)
V
CC
= 15 V, V
tr min.
= 2.5 V
6
s
t
W (tr)
= 3
s
Minimum reset pulse width
t
w (reset)
V
CC
= 15 V, V
tr min.
= 0 V
900
ns
Timing error
Astable multivibrator
Initial accuracy
R
A
, R
B
= 1 to 100 k
1
%
Temperature drift
C = 0.1
F
50
ppm/
C
Supply voltage drift
0.01
%/V
Notes 6. When the output is "H", the circuit current decreases by approximately 1 mA (when V
CC
= 5 V).
7. The maximum allowable value for R
A
+ R
B
is determined for a supply voltage of 15 V. The maximum
value is 20 M
.
8. When the reset pin is driven to a low level, discharge T
r
Q
14
is turned on, stopping oscillation (the output
state is undefined).
4
PC1555
CHARACTERISTIC CURVES (T
A
= 25
C, TYP.)
Minimum trigger pulse width characteristic
I
CC
-V
CC
characteristic
I
SOURCE
-(V
CC
-V
OUT
) characteristic
I
SINK
-V
OUT
characteristic
I
SINK
-V
OUT
characteristic
I
SINK
-V
OUT
characteristic
1.2
V
CC
= 15 V
1.0
0.8
0.6
0.4
0.2
0
1
2
3
4
5
6
T
J
= 125
C
T
I
= 25
C
Minimum trigger pulse width t
W (tr)
( s)
Minimum trigger pulse voltage V
tr min.
(V)
5
12
10
8
6
4
2
0
10
15
70
C
20
C
T
A
= 25
C
Supply voltage V
CC
(V)
Circuit current I
CC
(mA)
70
C
20
C
2
1
0
1
3
5
10
30 50
100
T
A
= 25
C
Output source current I
SOURCE
(mA)
Output saturation voltage V
CC
-V
OUT
(V)
10
0.1
1
0.01
1.0
3.0 5.0
10
30 50
100
V
CC
= 5 V
T
A
= 20
C
25
C
70
C
Output sink current I
SINK
(mA)
Output saturation voltage V
OUT
(V)
10
0.1
1
0.01
1.0
3.0 5.0
10
30 50
100
V
CC
= 10 V
25
C
70
C
20
C
T
A
= 25
C
70
C
20
C
Output sink current I
SINK
(mA)
Output saturation voltage V
OUT
(V)
10
0.1
1
0.01
1.0
3.0 5.0
10
30 50
100
V
CC
= 10 V
20
C
T
A
= 25
C
70
C
20
C
Output sink current I
SINK
(mA)
Output saturation voltage V
OUT
(V)
5
PC1555
Propagation delay characteristic
Discharge pin I
SINK
-V
SAT
characteristic
P
T
-T
A
characteristic
v
v
t
W
-t
W (tr)
characteristic
v
v
t
W
-t
tr min.
characteristic
5
4
3
2
1
0
2
4
6
V
CC
= 15 V
V
tr min
= 2.5 V
8
10
Trigger pulse width t
W (tr)
( s)
Minimum output pulse width -
trigger pulse width
v
t
W
( s)
700
600
500
400
300
200
100
10
20
C
G
40
60
80
100
Ambient temperature T
A
(
C)
Total loss P
T
(mW)
7
6
5
4
3
2
1
0
1
2
3
4
5
V
CC
= 15 V
t
W(tr)
= 5 s
Minimum trigger pulse voltage V
tr min.
(V)
Minimum output pulse width -
trigger pulse width
v
t
W
( s)
1.2
1.0
0.8
0.6
0.4
0.2
0
0.1
0.2
0.3
T
A
= 25
C
V
CC
= 5 V
V
CC
= 10 V,15 V
Minimum trigger pulse voltage (
V
CC
)
Propagation delay ( s)
V
CC
= 5 V
T
A
= 70
C
25
C
20
C
1000
100
10
1.0
0.01
0.1
1
10
100
Discharge pin (pin 7) sink current I
SINK
(mA)
Discharge pin saturation voltage V
SAT
(mV)
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