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SN54LV164A, SN74LV164A,pdf(8-B
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The ’LV164A devices are 8-bit parallel-out serial shift registers designed for 2-V to 5.5-V VCC operation.
These devices feature AND-gated serial (A and B) inputs and an asynchronous clear (CLR)\ input. The gated serial inputs permit complete control over incoming data, as a low at either input inhibits entry of the new data and resets the first flip-flop to the low level at the next clock pulse. A high-level input enables the other input, which then determines the state of the first flip-flop. Data at the serial inputs can be changed while the clock is high or low, provided the minimum setup time requirements are met. Clocking occurs on the low-to-high-level transition of the clock (CLK) input.
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