Logic Design for ArrayBased Circuitsby Donnamaie E. WhiteCopyright © 1996, 2001, 2002 Donnamaie E. White 


Power ConsiderationsLast Edit July 22, 2001 Step 5: Compute AC Power For all ECL Input Macros Using the counts from step 4, compute the AC power dissipated by the ECL inputs used in the circuit. For AMCC arrays, use: PacI = f * n * 3.25 microwatts where
Step 6: Find the Number of Internal Macros Using the macro occurrence worksheet, find the number of internal macros. For AMCC customers, the number of internal macros can be determined from the AMCC Population ERC report. Step 7: Compute AC Power For all Internal Macros Using the count from step 6, estimate the AC power dissipated by the internal macros used in the circuit: PacI = 0.20 * f * n * 3.25 microwatts where Step 8: Sum All Components of AC Power Sum the results together and convert to watts (or to the same units as was used for DC power). This equation provides an estimate of the worstcase AC power dissipation for the Q20000 array. PdAC = PacI + Pacinternal + PacDARoutputs Use the same equation for military and commercial computations. 
Copyright @ 2001,
2002 Donnamaie E. White, White
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