POWER consumption and very HIGH packing density.Also known as integrated injection circuit (I2C)Current hogging takes place in DCTL ECL:Fastest logic circuit availableDo not operate in the saturation regionAlso known as current mode logic.ECL is used in clock distribution circuits and other high-frequency applications. I2L (integrated injection logic):It is having the best figure of merit (1 Pico joule) among logic families.It is having BJT of multiple collectors.DUE to the absence of a resistor, it uses a small chip area and small power consumption. Current hogging: when two or more identical devices connected in parallel and if MAXIMUM current flows through in ONE device then it is known as current hogging. Due to current hogging maximum power dissipation occurs in one device only.FIGURE OF MERIT: It is a product of power dissipation and propagation delay.