Comparison of logic Families

By
Trupal Bhavsar
-
4
1305

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):

  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
  9. Application: Lab and demonstration equipment

2CMOS(Complementary-MOS):

  1. Components Used: MOSFTEs
  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/NOR
  9. Application: portable equipment as they consume less power

3ECL (Emitter Coupled Logic) :

  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/NOR
  9. Application: High speed switching applications due to high speed

4RTL(Resistor Transistor Logic):

  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
  9. Application: Not Used

5I2L(Integrated Injection Logic):

  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
  9. Application: LSI and VLSI applications due to high packaging density

6DCTL(Direct Coupled Transistor Logic):

  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
  9. Application: Not Used

7HTL (High Threshold Logic):

  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
  9. Application: Not Used

Learn Also:

Previous articlePPI Display in Radar | Plan Position Indicator
Next articleData Converters | D to A and A to D converters
Trupal Bhavsar
https://easyelectronics.co.in/
Electronics Engineering(2014 pass out) Junior Telecom Officer(B.S.N.L.) Project Development, PCB designing Teaching of Electronics Subjects

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