What is the difference between NE555 and LM555?

Another difference is that in the original NE555, the trigger signal is given more priority, whereas in the LM555, the threshold signal is given more priority. Generally, in a 555 timer, the output goes high when pin 2 (trigger) goes lower than 1/3VCC, and the output goes low when pin 6 (threshold) goes above 2/3VCC.

What can I use instead of a 555 timer?

Another interesting replacement for the 555, Linear Technology’s (now Analog Devices) LTC6906, is a pulse oscillator with a frequency range of 10 kHz to 1 MHz—pretty much the range of the 555. It’s made from CMOS and uses only a single external resistor to set the frequency.

What are 555 timers used for?

The standard 555 timer IC is used in a variety of timer, pulse generation and oscillator applications. It can be used to provide time delays, as oscillators and as flip-flop elements. The 555 timer IC is an integral part of electronics projects.

How does the NE555 timer work?

The 555 timer works by using three 5 kΩ resistors to divide the supply voltage in three. Two comparators compare these voltages to the input voltage, then sets or resets a flip-flop accordingly.

Are all 555 timer the same?

Due to minor variations in process the CMOS chips can have variations in performances and speeds, but mostly they are interchangeable with each other, just like a standard 555 is usually interchangeable between manufacturers.

In which decade did the 555 timer IC start being used commercially?

The 555 timer IC is an integrated circuit (chip) used in a variety of timer, delay, pulse generation, and oscillator applications. Derivatives provide two (556) or four (558) timing circuits in one package. The design was first marketed in 1972 by Signetics.

Why is it called 555?

The 555 Timers name comes from the fact that there are three 5kΩ resistors connected together internally producing a voltage divider network between the supply voltage at pin 8 and ground at pin 1.

Why is it called a 555 timer?