In this topic we are going to see all the Logic families in brief and comparison of logic families in the table format.
1TTL(Transistor Transistor Logic):
- Components Used: Transistor, diodes and resistor
- Fan Out: Moderate
- Propagation Delay: 10ns
- Noise Margin: Moderate
- Power Dissipation: 10 mW
- Speed Power product: 100 pJ
- Circuit complexity: complex
- Basic gate: NAND
- Application: Lab and demonstration equipment
2CMOS(Complementary-MOS):
- Components Used: MOSFTEs
- Fan Out: Highest
- Propagation Delay: 70 ns
- Noise Margin: High
- Power Dissipation: 0.1 mW
- Speed Power product: 0.7 pJ
- Circuit complexity: Moderately complex
- Basic gate: NAND/NOR
- Application: portable equipment as they consume less power
3ECL (Emitter Coupled Logic) :
- Components Used: Resistor and transistor
- Fan Out: High
- Propagation Delay: 2 ns
- Noise Margin: Low
- Power Dissipation: 40-50 mW
- Speed Power product: 40-100 pJ
- Circuit complexity: Complex
- Basic gate: OR/NOR
- Application: High speed switching applications due to high speed
4RTL(Resistor Transistor Logic):
- Components Used: Resistor and transistor
- Fan Out: Low
- Propagation Delay: 12 ns
- Noise Margin: Poor
- Power Dissipation: 30 mW
- Speed Power product: 144 pJ
- Circuit complexity: Not Complex
- Basic gate: NOR
- Application: Not Used
5I2L(Integrated Injection Logic):
- Components Used: Transistor
- Fan Out: Low
- Propagation Delay: 25-100 ns
- Noise Margin: High
- Power Dissipation: 5-20 mW
- Speed Power product: 4 pJ
- Circuit complexity: Not Complex
- Basic gate: NAND
- Application: LSI and VLSI applications due to high packaging density
6DCTL(Direct Coupled Transistor Logic):
- Components Used: Resistors and Transistor
- Fan Out: Low
- Propagation Delay: 10 ns
- Noise Margin: Poor
- Power Dissipation: 30 mW
- Speed Power product: 130 pJ
- Circuit complexity: Not Complex
- Basic gate: NOR
- Application: Not Used
7HTL (High Threshold Logic):
- Components Used: Resistors and Transistor
- Fan Out: Moderate
- Propagation Delay: 90 ns
- Noise Margin: Poor
- Power Dissipation: 55 mW
- Speed Power product: 4950 pJ
- Circuit complexity: Not Complex
- Basic gate: NAND
- Application: Not Used
Learn Also:
[…] bipolar families of logic circuits construct, especially from components fabricate bipolar transistor on the […]
[…] Comparison of logic Families […]
[…] Comparison of logic Families […]
[…] Comparison of logic Families […]