1) Propagation Delay:

The propagation delay tp of a signal path is the amount of time that it takes for a change in the input signal to produce a change in the output signal.

Where,

tpHL - The time between an input change and the corresponding output change when the output is changing from high to low.

tpLH - The time between an input change and the corresponding output change when the output is changing from low to high.

2) Noise Margin:

It is the maximum noise voltage added to an input signal of a digital circuit that doesn't cause an undesirable change in the circuit output. The ability of circuits to operate reliably in a noise environment is important in many applications. It is expressed in volts.

Noise margin ensures that the highest LOW voltage produced by an output is always lower than the highest voltage that an input can reliably interpret as LOW.

3) Current Parameters:

There are two different currents fro a CMOS circuit. They are: (i) Sink current (ii) Source current

1. Sink current - A device output is said to sink current when the current flows from the power supply, through the load and through the device output to ground. It is specified as IOLmax.
   IOLmax- The maximum current that the output can sink in the LOW state while still maintaining an output voltage no greater than the VOLmax.
2. Source current - A device output is said to source current when the current flows from the power supply, out of the device output and through the load to ground. (IOHmax)
   IOHmax - The max current that the output can source in the HIGH state while still maintaining an output voltage no less than VOHmin.

4) Temperature Range:

The logical circuit's operation parameters are temperature depended. The temperature range in which an IC functions properly must be known. The accepted temperature ranges are 0° to +70°C for consumer and industrial applications and -55°C to +125°C for military purposes.

5) Fanout:

The number of inputs that the gate can drive without exceeding its worst-case loading specifications.

The fanout depends not only on the characteristics of the output but also on the inputs that it is driving.