Quadruple Positive-NOR Gates With Schmitt-Trigger Inputs
In these devices SN74HC7002 , each circuit functions as a quadruple NOR Gate They perform the Boolean function Y = A ? B or Y = (A + B) in positive Logic However, because of the Schmitt action, the inputs have different input threshold levels for positive- and negative-going signals.
These circuits are temperature compensated and CAN be triggered from the slowest of input ramps and still give clean jitter-free output signals.
By Texas Instruments
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