In this topic, we are going to see all the Logic families in brief and comparison of logic families in the table format. Before starting the comparison of logic families we will get to know about some logic families and their important characteristics of logic families.
You can learn about the logic families and their characteristics from the link given below:
Learn Also : Classification and Parameters of Logic Families
Comparison of Logic Families TTL (Transistor Transistor Logic) Sr. No Parameter Value/Description 1. Components Used Transistor, diodes, and resistor 2. Fan Out Moderate 3. Propagation Delay 10ns 4. Noise Margin Moderate 5. Power Dissipation 10 mW 6. Speed Power product 100 pJ 7. Circuit complexity complex 8. Basic gate NAND Gate 9. Application Lab and demonstration equipment
CMOS (Complementary-MOS) Sr. No Parameter Value/Description 1. Components Used MOSFETs 2. Fan Out Highest 3. Propagation Delay 70 ns 4. Noise Margin High 5. Power Dissipation 0.1 mW 6. Speed Power product 0.7 pJ 7. Circuit complexity Moderately complex 8. Basic gate NAND Gate / NOR Gate 9. Application portable equipment as they consume less power
ECL (Emitter Coupled Logic) Sr. No Parameter Value/Description 1. Components Used Resistor and transistor 2. Fan Out High 3. Propagation Delay 2 ns 4. Noise Margin Low 5. Power Dissipation 40-50 mW 6. Speed Power product 40-100 pJ 7. Circuit complexity Complex 8. Basic gate OR Gate / NOR Gate 9. Application High-speed switching applications due to high speed
RTL (Resistor Transistor Logic) Sr. No Parameter Value/Description 1. Components Used Resistor and transistor 2. Fan Out Low 3. Propagation Delay 12 ns 4. Noise Margin Poor 5. Power Dissipation 30 mW 6. Speed Power product 144 pJ 7. Circuit complexity Not Complex 8. Basic gate NOR Gate 9. Application Not Used
I2 L (Integrated Injection Logic) Sr. No Parameter Value/Description 1. Components Used Transistor 2. Fan Out Low 3. Propagation Delay 25-100 ns 4. Noise Margin High 5. Power Dissipation 5-20 mW 6. Speed Power product 4 pJ 7. Circuit complexity Not Complex 8. Basic gate NAND Gate 9. Application LSI and VLSI applications due to high packaging density
DCTL (Direct Coupled Transistor Logic) Sr. No Parameter Value/Description 1. Components Used Resistors and Transistor 2. Fan Out Low 3. Propagation Delay 10 ns 4. Noise Margin Poor 5. Power Dissipation 30 mW 6. Speed Power product 130 pJ 7. Circuit complexity Not Complex 8. Basic gate NOR Gate 9. Application Not Used
HTL (High Threshold Logic) Sr. No Parameter Value/Description 1. Components Used Resistors and Transistor 2. Fan Out Moderate 3. Propagation Delay 90 ns 4. Noise Margin Poor 5. Power Dissipation 55 mW 6. Speed Power product 4950 pJ 7. Circuit complexity Not Complex 8. Basic gate NAND Gate 9. Application Not Used
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