555 Timer IC

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  • 555 timers are monolithic ICs that provide signals to a digital system to change its state. They also can be used as a multivibrator or a form of oscillator, which has two stages and can be output by either of the states. In essence, it’s two amplifier circuits arranged with regenerative feedback.
  • High Current Drive Capability (200mA)
  • Adjustable Duty Cycle
  • Temperature Stability of 0.005%/ °C
  • Timing From µSec to Hours
  • Turn off Time Less Than 2 µSec
  • Precision Timing
  • Pulse Generation
  • Time Delay Generation
  • Sequential Timing

The 555 Timer has three modes of Operation which are

  • Monostable
  • Astable
  • Bistable Mode


  • The 555 Timer IC is an integrated chip used in a variety of timer, pulse generation, and oscillator applications.
  • The 555 Timer IC is used to provide time delays, as an oscillator, and as a flip-flop element.