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DM74S161 Folha de dados(PDF) 4 Page - Fairchild Semiconductor |
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DM74S161 Folha de dados(HTML) 4 Page - Fairchild Semiconductor |
4 / 7 page www.fairchildsemi.com 4 Parameter Measurement Information Switching Time Waveforms Note A:The input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, duty cycle ≤ 50%, Z OUT ≈ 50Ω. For DM74S161/163, tr ≤ 2.5 ns, tf ≤ 2.5 ns. Vary PRR to measure fMAX. Note B: Outputs QDand carry are tested at tn + 16 for DM74S161, SM74S163 where tn is the bit time when all outputs are LOW Note C: VREF = 1.5V. Switching Time Waveforms Note A: The input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, duty cycle ≤ 50%, Z OUT ≈ 50Ω. tr ≤ 2.5 ns, tf ≤ 2.5 ns. Vary PRR to measure fMAX. Note B: Enable P and enable T setup times are measured at tn + 0. Note C:VREF = 1.5V. |
Nº de peça semelhante - DM74S161 |
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Descrição semelhante - DM74S161 |
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