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74HCT648 データシート(PDF) 4 Page - NXP Semiconductors |
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74HCT648 データシート(HTML) 4 Page - NXP Semiconductors |
4 / 12 page December 1990 4 Philips Semiconductors Product specification Octal bus transceiver/register; 3-state; inverting 74HC/HCT648 FUNCTION TABLE Notes 1. H = HIGH voltage level L = LOW voltage level X = don’t care ↑ = LOW-to-HIGH level transition 2. The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled, i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock inputs. INPUTS (1) DATA I/O (2) FUNCTION OE DIR CPAB CPBA SAB SBA A0 TO A7 B0 TO B7 H H X X H or L ↑ H or L ↑ X X X X input input isolation store A and B data L L L L X X X H or L X X L H output input real-time B data to A bus stored B data to A bus L L H H X H or L X X L H X X input output real-time A data to B bus stored A data to B bus Fig.4 Functional diagram. |
同様の部品番号 - 74HCT648 |
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同様の説明 - 74HCT648 |
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