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MC74AC652 Datasheet(PDF) 3 Page - ON Semiconductor |
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MC74AC652 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 10 page MC74AC652, MC74ACT652 www.onsemi.com 3 FUNCTION TABLE Inputs Data I/O* Operation or Function GAB GBA CAB CBA SAB SBA A0 − A7 B0 − B7 L H H or L H or L X X Input Input Isolation L H ⇑ ⇑ X X Store A and B Data X H ⇑ H or L X X Input Unspecified* Store A, Hold B H H ⇑ ⇑ X** X Input Output Store A in Both Registers L X H or L ⇑ X X Unspecified* Input Hold A, Store B L L ⇑ ⇑ X X** Output Input Store B in Both Registers L L X X X L Output Input Real-Time B Data to A Bus L L X H or L X H Stored B Data to A Bus H H 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 *The data output functions may be enabled or disabled by various signals at the GBA and GAB inputs. Data input functions are always enabled; i.e., data at the bus pins will be stored on every LOW-to-HIGH transition of the appropriate clock inputs. **Select control = L: clocks can occur simultaneously. H = HIGH Voltage Level; L = LOW Voltage Level; X = Immaterial; ⇑ = LOW-to-HIGH Transition |
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