Digital logic family is a group of logic gates constructed using passive devices like a resistor, transistor, diodes, etc. Such devices have compatible logic levels and supply voltage with certain characteristics.According to the components used, there are different types of logic families. Some of the logic families include Resistor-Transistor logic(RTL), Diode-Transistor logic(DTL), Transistor-transistor logic(TTL), Emitter coupled logic(ECL), PMOS, NMOS, and CMOS circuits.