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ECL is used only in systems requiring high-speed operation. TTL has a well established popularity among logic families. TTL Transistor-transistor logic ECL Emitter-coupled logic MOS Metal-oxide semiconductor CMOS Complementary metal-oxide semiconductor TTL and ECL are based upon bipolar transistors. The following logic families are the most frequently used. Each logic family has its own basic electronic circuit upon which more complex digital circuits and functions are developed. Digital IC gates are classified not only by their logic operation, but also the specific logic-circuit family to which they belong. These basic logic gates are implemented as small-scale integrated circuits (SSICs) or as part of more complex medium scale (MSI) or very large-scale (VLSI) integrated circuits. A gate can be extended to have multiple inputs if the binary operation it represents is commutative and associative. The AND, OR, NAND, and NOR gates can be extended to have more than two inputs. The small circle on the output of the circuit symbols designates the logic complement. It is seen from the Fig that each gate has one or two binary inputs, A and B, and one binary output, C.
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below shows the circuit symbol, Boolean function, and truth. These logic gates perform the basic Boolean functions, such as AND, OR, NAND, NOR, Inversion, Exclusive-OR, Exclusive-NOR. IC 7400, IC 7408, IC 7432, IC 7406, IC 7402, IC 7404, IC 7486 THEORY: The basic logic gates are the building blocks of more complex logic circuits. COMPONENTS REQUIRED: Logic gates (IC) trainer kit.
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1 EXPERIMENT: 1 LOGIC GATES AIM: To study and verify the truth table of logic gates LEARNING OBJECTIVE: Identify various ICs and their specification.