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The SN74LV273A-Q1 device is an octal positive-edge triggered D-type flip-flop with shared direct active low clear (CLR) input and clock (CLK).
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 or transitioning from a high level to a low level, the D input has no effect at the output. Information at the data (Q) outputs can be asynchronously cleared with a low level input through the clear (CLR) pin.