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74ACTQ652SC Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74ACTQ652SC Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 9 page www.fairchildsemi.com 2 Function Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = LOW-to-HIGH Clock Transition Note 1: The data output functions may be enabled or disabled by various signals at OEAB or OEBA inputs. Data input functions are always enabled, i.e., data at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs. Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Inputs Inputs/Outputs (Note 1) Operating Mode OEAB OEBA CPAB CPBA SAB SBA A0 thru A7 B0 thru B7 L H H or L H or L X X Input Input Isolation LH X X Store A and B Data XH H or L X X Input Not Specified Store A, Hold B HH X X Input Output Store A in Both Registers LX H or L X X Not Specified Input Hold A, Store B LL X X Output Input Store B in Both Registers L L XXX L Output Input Real-Time B Data to A Bus L L X H or L X H Store B Data to A Bus HH X X L X Input Output Real-Time A Data to B Bus H H H or L X H X Stored A Data to B Bus H L H or L H or L H H Output Output Stored A Data to B Bus and Stored B Data to A Bus |
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