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Dual Timer
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SNAS549A - MARCH 2000 - REVISED OCTOBER 2015 LM556 Dual Timer
1 Features 3 Description •
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• The LM556 dual-timing circuit is a highly-stable
controller capable of producing accurate time delays
or oscillation. The LM556 device is a dual-timing
version of the LM555 device. Timing is provided by
an external resistor and capacitor for each timing
function. The two timers operate independently of
each other, sharing only VCC and ground. The circuits
may be triggered and reset on falling waveforms. The
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