What is meant by logic family?
A logic family of monolithic digital integrated circuit devices is a group of electronic logic gates constructed using one of several different designs, usually with compatible logic levels and power supply characteristics within a family.
What is logic family Slideshare?
The basic circuit of the RTL logic family is the NOR. Each input is associated with one resistor and one transistor. The collector of the transistor are tied together at the output The voltage levels for the circuit are 0.2v for the low level and from 1 to 3.6v for the high level. CIRCUIT DIAGRAM.
What is logic family and classification?
Classification of Logic Family Saturated Bipolar Logic Family: In this family the transistors used in ICs are driven into saturation. Transistor-Transistor Logic (TTL) Resistor-Transistor Logic (RTL) Direct Coupled Transistor Logic (DCTL) Diode Transistor Logic (DTL)
How many logic families are there?
Four major logic families that predominated from the 1970’s through the 1990’s are Transistor-Transistor Logic (TTL), Complementary Metal-Oxide-Semiconductor Logic (CMOS, pronounced sea-moss), Low Voltage TTL Logic (LVTTL), and Low Voltage CMOS Logic (LVCMOS). Their logic levels are compared in Table 1.4.
What are the types of logic families?
Types of Logic Family The logic families which fall under the first kind are called bipolar families, this include diode logic (DL), emitted coupled logic (ECL), resistor transistor logic (RTL), diode transistor logic (DTL), transistor transistor logic (TTL).
Is the most popular general purpose logic family?
TTL is the most popular general purpose logic family. It is available in different series with a wide range of operating speed, power dissipation and fan-out.
Which was the first logic family?
The first, and oldest, family is TTL. TTL stands for ‘transistor-transistor logic’, this logic family having replaced the older (now obsolete) DTL—diode-transistor logic. The second logic family is CMOS (pronounced ‘sea-moss’) which stands for ‘complementary metal oxide semiconductor’.
What are the different parameters used in logic family?
These characteristics include supply voltage range, speed of response, power dissipation, input and output logic levels, current sourcing and sinking capability, fan-out, noise margin, etc. In other words.
What is figure of merit in logic families?
Figure of merit is a product of propagation delay and power dissipation. It is measured in terms of Pico-Joules (ns ´mW = pJ). Current and voltage parameters define the minimum and maximum limit of current and voltage for input and output of a logic family.
Which is the fastest logic family?
Emitter-coupled logic (ECL)
Emitter-coupled logic (ECL) is a BJT-based logic family which is generally considered as the fastest logic available.
