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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. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor.
The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.
The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.
Bert
Reviewed in the United States on September 15, 2024
I have put these ICs through their paces with lots of connection mistakes on my breadboard when applying voltage, and they have held up strong without frying on me. I love these little guys and would 100% only buy this particular brand in the future for all my custom circuit builds. Great reliability and performance for general circuit building.
KZ
Reviewed in the United States on December 17, 2024
Works perfectly!!!
Tim Harwood
Reviewed in the United States on November 13, 2024
They are exactly what I need for the projects I'm working on
Danny D.
Reviewed in the United States on October 23, 2024
I have had a good experience with these particular 555's. They appear to be genuine TI branded timers, and the few I have tried performed perfectly.Would recommend!
Wayne Miller
Reviewed in Canada on November 21, 2020
Works as expected
Chris Marcellus
Reviewed in Canada on November 13, 2020
Great provider of chips needed. Good experience and will purchase from them again.
Mac
Reviewed in the United States on November 28, 2019
NE555P has multiple uses and is an urgent companion to OTHER ICs. When designing or repairing circuits, this puppy is Nearly Always a problem solver for both novice and professional.
Lioneheart
Reviewed in Canada on November 20, 2019
It is wat I expected thanks
Benoit Ouellet
Reviewed in Canada on September 28, 2017
Reçu en bonne condition. 1 sur 12 utilisée. En ordre.
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