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HD74LS192 Fiches technique(PDF) 8 Page - Renesas Technology Corp |
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HD74LS192 Fiches technique(HTML) 8 Page - Renesas Technology Corp |
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8 / 11 page ![]() HD74LS192 Rev.2.00, Feb.18.2005, page 8 of 10 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 + 2) (Measure at tn + 2) (Measure at tn + 0) (Measure at tn + 1) (Measure at tn + 4) (Measure at tn + 6) (Measure at tn + 2) tPLH tPLH tPLH tPLH tPLH VOH VOL VOH VOL VOH VOL VOH VOL VOH VOL 0V 3V 10% 10% 90% 90% Notes: 1. for ƒ max tTLH , tTHL ≤ 2.5 ns. 2. tn is reference bit time when all outputs are high. |
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