The SNx4HC273 devices are positive-edge-triggered D-type flip-flops with a direct active
low clear (CLR) input.
Information at the data (D) inputs meeting the setup time requirements is transferred to
the Q outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a
particular voltage level and is not related directly to the transition time of the positive-going
pulse. When CLK is at either the high or low level, the D input has no effect at the output.
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