The main advantages of CMOS integrated circuits are:
(1) Low power consumption, its static operating current in the order of 109A, is currently the lowest in all digital integrated circuits.
(2) High input impedance, usually greater than 1010Ω.
(3) Close to the ideal transmission characteristics, the output high level can reach more than 99.9% of the power supply voltage, the low level can reach less than 0.1% of the power supply voltage.
(4) The power supply voltage range is wide, can operate normally in 3~18V.
(5) Due to the high input impedance, the driving current is required to be very small, about 0,1uA, and the output current is about 500uA under 5V power supply, which is far less than TTI' The circuit.