The most popular IC of all time – 555 Timer

This timer IC was designed in 1971 by Hans R. Camenzind under contract to Signetics, which was later acquired by Philips. Can be used as a timer, flip-flop or oscillator. Guestimated 10^9 units are made annually making this perhaps most popular IC of all time. Read more via web link to Wiki or interview with Mr. Camenzind

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