LM555C
LM555C is Timer manufactured by National Semiconductor.
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 oscillator 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 m A 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 m A Y Output and supply TTL patible 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
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 m W 1180 m W
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 surface mount devices
Electrical Characteristics (TA e 25 C VCC e a5V to a15V unless othewise specified)
Limits
Parameter
Conditions
LM555
Min Typ Max...
