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National Semiconductor Electronic Components Datasheet

LM555C Datasheet

Timer

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February 1995
LM555 LM555C Timer
General Description
The LM555 is a highly stable device for generating accurate
time delays or oscillation Additional terminals are provided
for triggering or resetting if desired In the time delay mode
of operation the time is precisely controlled by one external
resistor and capacitor For astable operation as an oscilla-
tor the free running frequency and duty cycle are accurately
controlled with two external resistors and one capacitor
The circuit may be triggered and reset on falling waveforms
and the output circuit can source or sink up to 200 mA or
drive TTL circuits
Features
Y Direct replacement for SE555 NE555
Y Timing from microseconds through hours
Y Operates in both astable and monostable modes
Y Adjustable duty cycle
Y Output can source or sink 200 mA
Y Output and supply TTL compatible
Y Temperature stability better than 0 005% per C
Y Normally on and normally off output
Applications
Y Precision timing
Y Pulse generation
Y Sequential timing
Y Time delay generation
Y Pulse width modulation
Y Pulse position modulation
Y Linear ramp generator
Schematic Diagram
C1995 National Semiconductor Corporation TL H 7851
TL H 7851 – 1
RRD-B30M115 Printed in U S A


National Semiconductor Electronic Components Datasheet

LM555C Datasheet

Timer

No Preview Available !

Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
a18V
Power Dissipation (Note 1)
LM555H LM555CH
LM555 LM555CN
760 mW
1180 mW
Operating Temperature Ranges
LM555C
LM555
0 C to a70 C
b55 C to a 125 C
Storage Temperature Range
b65 C to a150 C
Soldering Information
Dual-In-Line Package
Soldering (10 Seconds)
Small Outline Package
Vapor Phase (60 Seconds)
Infrared (15 Seconds)
260 C
215 C
220 C
See AN-450 ‘‘Surface Mounting Methods and Their Effect
on Product Reliability’’ for other methods of soldering sur-
face mount devices
Electrical Characteristics (TA e 25 C VCC e a5V to a15V unless othewise specified)
Limits
Parameter
Conditions
LM555
LM555C
Min Typ Max Min Typ Max
Supply Voltage
4 5 18 4 5 16
Supply Current
VCC e 5V RL e %
VCC e 15V RL e %
(Low State) (Note 2)
35
10 12
36
10 15
Timing Error Monostable
Initial Accuracy
Drift with Temperature
Accuracy over Temperature
Drift with Supply
RA e 1k to 100 kX
C e 0 1 mF (Note 3)
05
30
15
0 05
1
50
15
01
Timing Error Astable
Initial Accuracy
Drift with Temperature
Accuracy over Temperature
Drift with Supply
RA RB e 1k to 100 kX
C e 0 1 mF (Note 3)
15
90
25
0 15
2 25
150
30
0 30
Threshold Voltage
0 667
0 667
Trigger Voltage
Trigger Current
VCC e 15V
VCC e 5V
48 5
1 45 1 67
0 01
52
19
05
5
1 67
05 09
Reset Voltage
04 05
1 04 05
1
Reset Current
01 04
01 04
Threshold Current
(Note 4)
0 1 0 25
0 1 0 25
Control Voltage Level
Pin 7 Leakage Output High
VCC e 15V
VCC e 5V
9 6 10 10 4 9 10 11
2 9 3 33 3 8 2 6 3 33
4
1 100
1 100
Pin 7 Sat (Note 5)
Output Low
Output Low
VCC e 15V I7 e 15 mA
VCC e 4 5V I7 e 4 5 mA
150
70 100
180
80 200
Units
V
mA
mA
%
ppm C
%
%V
%
ppm C
%
%V
x VCC
V
V
mA
V
mA
mA
V
V
nA
mV
mV
2


Part Number LM555C
Description Timer
Maker National Semiconductor
Total Page 10 Pages
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