The logic families have fan out more than TTL A. RTL B. ECL C. DTL D. CMOS Choose the correct answer from the options given below.
B and D only
The question asks which logic families have a fan-out greater than TTL (Transistor-Transistor Logic). Let’s go through the options:
- RTL (Resistor-Transistor Logic): RTL typically has a lower fan-out compared to TTL due to its design using resistors which can limit the number of inputs it can drive effectively. Therefore, RTL cannot be the correct answer.
- ECL (Emitter-Coupled Logic): ECL is known for its very high speed and high fan-out capabilities, often greater than TTL, due to its differential amplifier structure and very low input impedance. Therefore, ECL is a possible correct answer.
- DTL (Diode-Transistor Logic): Like RTL, DTL also typically has a lower fan-out compared to TTL due to the limitations imposed by the series diodes in the input. Therefore, DTL cannot be the correct answer.
- CMOS (Complementary Metal-Oxide-Semiconductor): CMOS logic family has a very high fan-out capability compared to TTL. This is because CMOS devices consume power only when switching states, allowing them to drive many inputs with minimal power consumption. Therefore, CMOS is a correct answer.
Thus, the logic families with a fan-out greater than TTL are ECL and CMOS. Based on this analysis, option B ("B and D only") is the correct choice.
Similar Questions
Arrange in ascending order based on power dissipation the following logic families :
(i) ECL
(ii) TTL
(iii) CMOSMatch the following :
List – I List – II a. I2L i. XOR b. high impedance state ii. non-saturation logic c. controlled inverter iii. tristate d. ECL iv. bipolar logic Codes :
Given that for a logic family :
(A) VOH is the maximum output high level voltage
(B) VOL is the maximum input low level voltage
(C) VIH is the minimum input acceptable input high voltage level
(D) VIL is the minimum acceptable input low voltage levelChoose the most appropriate answer from the options given below :
Match the following lists in terms of power dissipation/Gate:
List – I List – II a. BiCMOS i. 6 mW b. ECL ii. 2.75 μW c. CMOS (AHC) iii. 25 mW to 73 mW d. bipolar TTL (F) iv. 17 μw Choose the correct answer from the codes given below:
Arrange the following in terms of decreasing order of power dissipation :
(a) CMOS
(b) ECL
(c) TTL
(d) MOS
The correct sequence of decreasing order of power dissipation is
For a three state TTL following statements are given :
(a) It allows to connect outputs directly.
(b) It allows to connect the inputs directly.
(c) It is used to decrease the switching time.
(d) It is used to increase the switching time in order to interface the peripherals for matching the speed with computer.
Which of the above are correct ?
Match the following in context of Fan out of various families :
List - I List - II (a) DTL (i) 20 (b) TTL (ii) 30 (c) PMOS (iii) 50 (d) CMOS (iv) 5 to 15 Codes :
For wired AND connection we should use :
Match the following :
List - I List - II (a) TTL (i) Consumer maximum power (b) ECL (ii) Highest Packaging Density (c) NMOS (iii) Least power consumption (d) CMOS (iv) Saturated logic Codes :
Match the following lists :
List – I List – II a. IC 7400 i. Quad 2-input NOR gate b. IC 7402 ii. Quad 2-input AND gate c. IC 7408 iii. Quad 2-input OR gate d. IC 7432 iv. Quad 2-input NAND gate
Important Questions from Logic Families
Which of the following pair is correct?
I. RTL – Saturated bipolar logic family
II. ECL – Non-Saturated bipolar logic family
- Which of the following logic families has the maximum noise margin?
The figure of merit of digital IC is defined as:
- Which of the following logic families has the highest packing density?
The figure of merit of logic family is often measured in the unit of:
