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74AHCT259 Scheda tecnica(PDF) 3 Page - NXP Semiconductors |
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74AHCT259 Scheda tecnica(HTML) 3 Page - NXP Semiconductors |
3 / 20 page 2000 Mar 14 3 Philips Semiconductors Product specification 8-bit addressable latch 74AHC259; 74AHCT259 QUICK REFERENCE DATA GND = 0 V; Tamb =25 °C; tr =tf ≤ 3.0 ns. Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW). PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz; fo = output frequency in MHz; ∑ (CL × VCC2 × fo) = sum of outputs; CL = output load capacitance in pF; VCC = supply voltage in Volts. 2. The condition is VI = GND to VCC. SYMBOL PARAMETER CONDITIONS TYPICAL UNIT AHC AHCT tPHL/tPLH propagation delay DtoQn CL = 15 pF; VCC = 5 V 4.1 4.1 ns An to Qn 5.3 5.5 ns LE to Qn 4.3 4.3 ns MR to Qn 3.9 3.9 ns CI input capacitance VI =VCC or GND 3.0 3.0 pF CO output capacitance 4.0 4.0 pF CPD power dissipation capacitance CL = 50 pF; f = 1 MHz; notes 1 and 2 13 17 pF |
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