Digital Electronics And Logic Design

Digital Logic Families In Digital Designs, our primary aim is to create an Integrated Circuit (IC). A Circuit configuration or arrangement of the circuit elements in a special manner will result in a particular Logic Family. The electrical characteristics of the IC will be identical. In other words, the different parameters like Noise Margin, Fan In, Fan Out etc will be identical. Different ICs belonging to the same logic families will be compatible with each other. The basic Classification of the Logic Families are as follows: A) Bipolar Families B) MOS Families C) Hybrid Devices A) Bipolar Families: Diode Logic (DL) Resistor Transistor Logic (RTL) Diode Transistor Logic (DTL) Transistor-Transistor Logic (TTL) Emitter Coupled Logic (ECL) or Current Mode Logic (CML) Integrated Injection Logic (IIL) B) MOS Families: 1. P-MOS Family 2. N-MOS Family 3. Complementary-MOS Family Standard C-MOS Clocked C-MOS Bi-CMOS Pseudo N-MOS C-MOS Domino Logic Pass Transistor Logic C) Hybrid Family: Bi-C

  Introduction and classification of  Digital Logic Families Due to the advances in microelectronics, the digital IC technology has rapidly  advanced from small scale integration (SSI), through medium scale integration (MSI),large scale integration (LSI), very large scale integration (VLSI), ultra large scale integration(ULSI) and now t he technology is entering to giga scale integration (GSI) in which millions of gate equivalent circuits are integrated on a single chip.The use of ICs has reduced the overall size , the cost and the power consumption due to which the reliability has improved because the number of external  interconnections from one device to another has reduced. 1.Definition   :- A group of compatible IC's (Integrated Circuits) with same logic levels and supply voltages fabricated for performing various logic functions reffered to as digital logic family.These families vary by speed, power consumption, cost, voltage & current levels 2.Classification  :  The enti