The NE555 parts were commercial temperature range, 0 °C to +70 °C, and the SE555 part number designated the military temperature range, −55 °C to +125 °C.
These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network.
The NE555, SA555, and SE555 monolithic timing circuits are highly stable controllers capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor.
The result was the NE555: an eight-pin analog timer that could generate one-shots, square waves, and flip-flops depending on how you wired it. It operated from a single supply, featured a powerful output stage, and was tolerant in noisy environments.
The Nx555 and Sx555 devices are precision timing circuits capable of producing accurate time delays or oscillation. In time-delay or monostable operating modes, the timed interval is controlled by a single external resistor and capacitor network.
Learn how the NE555 timer works, datasheet, pinout, and basic stable multivibrator (Free-running) or square wave oscillator circuit.