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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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HD74LS193P 数据表(PDF) 8 Page - Renesas Technology Corp |
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HD74LS193P 数据表(HTML) 8 Page - Renesas Technology Corp |
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8 / 12 page  HD74LS193 Rev.2.00, Feb.18.2005, page 8 of 11 Waveforms 2 ƒ max, tPLH, tPHL, (Count Down) Borrow Outputs Count Down 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V tTHL tw (H) tw (L) tTLH QA QB QC QD tPHL tPHL tPHL tPHL tPHL (Measure before 1 clock of tn + 0) (Measure at tn + 0) (Measure at tn + 0) (Measure at tn + 0) (Measure at tn + 0) (Measure at tn + 0) (Measure at tn + 1) (Measure at tn + 2) (Measure at tn + 4) (Measure at tn + 8) tPLH tPLH tPLH tPLH tPLH VOH VOL VOH VOL VOH VOL VOH VOL VOH VOL 0V 3V 10% 10% 90% 90% Notes: 1. Input pulse; tTLH ≤ 7 ns, t THL ≤ 7 ns, PRR = 1 MHz, duty cycle 50% 2. for ƒ max tTLH , tTHL ≤ 2.5 ns. 3. tn is reference bit time when all outputs are high. |
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