Radio Push-Button Micropower Circuit Using Two Common ICs 2015-08-25

The Radio Push Button function is occasionally needed where one momentary button being pushed, of several, gives a latched output representing that button, simultaneously cancelling any previous latched output from a different button.
Of course a microcontroller can readily perform this function but often a simple logic function solution is preferred.
Unlike many non-μC circuits that require a clock pulse or RC delay circuits to properly perform this function, the circuit below...

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