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Need IC to output first input state received, then stay that way

ultr

Mar 6, 2011
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Mar 6, 2011
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Ok guys I need a device that when a high pulse (low then briefly high then low again) is received on an input terminal, an output is made high and will stay high until a voltage is applied to a "reset" pin, even if the input state changes. Can anyone name the device an give an example of an IC?

I am new to all this- thanks in advance
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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SR flip-flop.
 

Laplace

Apr 4, 2010
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An SR flip flop is the simplest approach. But the output state can be indeterminate if the SET and RESET inputs are asserted at the same time. If that might be a problem, then a JK flip flop with the clock input driven by your input signal and the JK inputs wired to make the output go HIGH may be called for. In that arrangement the flip flop RESET input would take precedence.
 
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