lm555 timer internal circuit block schematic diagramThe LM555 is a highly stable controller capable of producing accurate timing pulses. With a monostable operation, the time delay is controlled by one external resistor and one capacitor.

This device features: Adjustable Duty Cycle, Turn off Time Less Than 2μSec, Temperature Stability of 0.005%/°C, High Current Drive Capability (200mA) and Timing From μSec to Hours.

The LM555 timer is applicable for Precision Timing, Time Delay Generation, Sequential Timing and Pulse Generation. The above schematic shows the LM555 Timer Internal Circuit Block Diagram. The Absolute Maximum Ratings (TA = 25°C) of LM555 are as follows:

Parameter
Supply Voltage
Lead Temperature (Soldering 10sec)
Power Dissipation
Operating Temperature Range
Storage Temperature Range

Value
16V
300°C
600mW
(0 ~ +70)°C
(-65 ~ +150)°C



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