Which of the following summarizes the important features of ECL?

A. Low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption

B. Good noise immunity, negative logic, high frequency capability, low power dissipation, and short propagation time

C. Slow propagation time, high frequency response, low power consumption, and high output voltage swings

D. Poor noise immunity, positive supply voltage operation, good low frequency operation, and low power

What must be done to interface TTL to CMOS?

A. A dropping resistor must be used on the CMOS 12 V supply to reduce it to 5 V for the TTL.

B. As long as the CMOS supply voltage is 5 V, they can be interfaced; however, the fan-out of the TTL is limited to five CMOS gates.

C. A 5 V Zener diode must be placed across the inputs of the TTL gates in order to protect them from the higher output voltages of the CMOS gates.

D. A pull-up resistor must be used between the TTL output-CMOS input node and Vcc; the value of RP will depend on the number of CMOS gates connected to the node.