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74LVC74ADB Datasheet(PDF) 7 Page - NXP Semiconductors |
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74LVC74ADB Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 16 page 74LVC74A_6 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 06 — 4 June 2007 7 of 16 NXP Semiconductors 74LVC74A Dual D-type flip-flop with set and reset; positive-edge trigger [4] CPD is used to determine the dynamic power dissipation (PD in µW). PD =CPD × VCC2 × fi × N+ Σ(CL × VCC2 × fo) where: fi = input frequency in MHz; fo = output frequency in MHz CL = output load capacitance in pF VCC = supply voltage in Volts N = number of inputs switching Σ(CL × VCC2 × fo) = sum of the outputs 11. AC waveforms The shaded areas indicate when the input is permitted to change for predictable output performance. VM = 1.5 V at VCC ≥ 2.7 V; VM = 0.5 × VCC at VCC < 2.7 V; VOL and VOH are typical output voltage levels that occur with the output load. Fig 7. The clock input (nCP) to output (nQ, nQ) propagation delays, the clock pulse width, the nD to nCP set-up, the nCP to nD hold times, and the maximum frequency mna422 th tsu th tPHL tPHL tW tPLH tPLH tsu 1/fmax VM VM VM VM VI GND VI GND nCP input nD input VOH VOL nQ output VOH VOL nQ output |
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