What are the basic operation modes of the 555 timer?

What are the basic operation modes of the 555 timer?

The operating modes of a 555 timer are astable, bistable and monostable. Each mode of operation signifies with a circuit diagram and its output.

What are the features of 555 timer?


  • Direct replacement for SE556/NE556.
  • Timing from microseconds to hours.
  • Operates in both astable and monostable modes.
  • Replaces two 555 timers.
  • Adjustable duty cycle.
  • Output can source or sink 200mA.
  • Output and supply TTL compatible.
  • Temperature stability better than 0.005% per ˚C.

What are the applications of 555 Timer?

Applications include timers, missing pulse detection, bounce-free switches, touch switches, frequency divider, capacitance measurement, pulse-width modulation (PWM), and so on. Bistable (flip-flop) mode – the 555 operates as an SR flip-flop. Uses include bounce-free latched switches.

Why is it called 555 Timer?

The 555 Timer IC got its name from the three 5KΩ resistors that are used in its voltage divider network. This IC is useful for generating accurate time delays and oscillations.

How many different 555 timers are there?

There are two types of 555 timer based on its nomenclature – NE 555 Timer and SE 555 Timer. While NE 555 timer can be used in the temperature range from 0 to 70°C, the SE 555 Timer can be used in the temperature range from -55°C to 125°C and has a temperature stability of 0.005% per 0C..

What is the maximum voltage that can be given to a 555 timer?

555 supply (pins 1 and 8) The 555 timer can be used with a supply voltage (Vs) in the range 4.5V to 15V (18V is the absolute maximum). Pin 1 connects to 0V. Pin 8 connects to the positive supply +Vs.

What is a 555 timer and how does it work?

The 555 timer is a chip that can be used to create pulses of various durations, to output a continuous pulse waveform of adjustable pulse width and frequency, and to toggle between high and low states in response to inputs. By wiring the 555 timer with resistors and capacitors in various ways, you can get it to operate in three different modes:

What are different modes of 555 timer?

Operating Modes of 555 Timer IC Astable Mode Operation. In this mode, the circuit of the IC 555 timer produces the continuous pulses with exact frequency based on the value of the two resistors and capacitors. Monostable Mode Operation. In this mode, the circuit generates only single pulse when the timer gets an indication from i/p of the trigger button. Bistable Mode Operation.

What are the applications of 555 timer?

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