How is the speed-power product of a logic family determined?

How is the speed-power product of a logic family determined? Correct Answer The propagation delay in ns is multiplied by the power dissipation in mW

Propagation delay:

• The average transition delay time for the signal to propagate from input to output where the signal changes in value.
• Propagation delays are separately defined for LOW-to-HIGH and HIGH-to-LOW transitions at the output.
• We also define enable and disable time delays that occur during the transition between the high-impedance state and defined logic LOW or HIGH states.
• Generally, propagation delay will be in the order of nanoseconds (ns).

Power dissipation:

• The power dissipation of a logic gate is the power required by the gate to operate with a 50% duty cycle at a specified frequency.
• Power dissipation generally expressed in milliwatt (mW).

Speed-power product:

A common means for measuring and comparing the overall performance of an IC family is the speed-power product.

• Speed-power product is defined as the product of propagation delay time in ns and power dissipation in mW.
• It is also called a figure of merit.
• Normally, the minimum values of the speed-power product are desired for better performance.