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MC74LCX646 Datasheet(PDF) 2 Page - ON Semiconductor |
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MC74LCX646 Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 10 page LOGIC DIAGRAM C D Q OE DIR CBA SBA SAB CAB C D Q A0 B0 1 of 8 Channels To 7 Other Channels 1 3 21 22 2 23 MC74LCX646 MOTOROLA LCX DATA BR1339 — REV 3 2 FUNCTION TABLE Inputs Data Ports Operating Mode OE DIR CAB CBA SAB SBA An Bn Operating Mode H X Input Input ↑ ↑ X X X X Isolation, Hold Storage ↑ ↑ X X l h X X X X l h Store A and/or B Data L H Input Output ↑ X* L X L H L H Real Time A Data to B Bus H X X QA Stored A Data to B Bus ↑ X* L X l h L H Real Time A Data to B Bus; Store A Data H X L H QA QA Clock A Data to B Bus; Store A Data L L Output Input X* ↑ X L L H L H Real Time B Data to A Bus X H QB X Stored B Data to A Bus X* ↑ X L L H l h Real Time B Data to A Bus; Store B Data X H QB QB L H Clock B Data to A Bus; Store B Data H = High Voltage Level; h = High Voltage Level One Setup Time Prior to the Low–to–High Clock Transition; L = Low Voltage Level; l = Low Voltage Level One Setup Time Prior to the Low–to–High Clock Transition; X = Don’t Care; ↑ = Low–to–High Clock Transition; ↑ = NOT Low–to–High Clock Transition; QA = A input storage register; QB = B input storage register; * = The clocks are not internally gated with either the Output Enables or the Source Inputs. Therefore, data at the A or B ports may be clocked into the storage registers, at any time. For ICC reasons, Do Not Float Inputs. |
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