Nncomparison of logic families in digital electronics books

This ic is usually referred to as a monolithic ic first introduced in 1958. Understanding and analysis of different logic families including nmos cmos, ttl and ecl. A tabulation of the major logic families with relevant data is given. Designers of electronic logic gates ics fight with the tendency of switching circuits to use more power the faster they switch. A family has its own power supply voltage and distinct logic levels. Some families were also introduced as individual components which were used to design integrated circuits and also to interconnect them. Digital logic gates nand and nor are called universal logic gate because we can construct all other logic. Little logic gates can be used in any digital circuit, pc, portable equipment. Foundation of digital electronics and logic design index of. Logic families significance and types of logic families. Transistortransistor logic ttl is a logic family built from bipolar junction transistors. Logic families power, speed and compatibility electronics. Logic families are defined as a group of electronic logic gates and circuits used in ic integrated circuits. They deliver speed and drive on a par with ttl, quashing worries about highspeed systems built with cmos alone.

In this chapter, we will selection from digital electronics. Each logic family has its own basic electronic circuit upon which more complex digital circuits and functions are developed. The families rtl, dtl, and ecl were derived from the logic circuits used in early. A logic family of monolithic digital integrated circuit devices is a group of. Digital logic gates nand and nor are called universal logic gate because we can construct all other logic gates using nand gate or nor gate alone. Small scale integration ssi digital electronics for gate tutorials point india ltd. In this module, the differences and similarities between the various families of logic ics available are. Logic families digital electronics wiley online library.

Characteristics of logic families are speed, fanin, fanout, noise immunity, power dissipation. In digital electronics, a logic family refers to digital integrated circuit devices which are constructed witha combination of electronic gates. Reproduction of significant portions of ti information in ti data books or data sheets. Mam its really helpful to as tnku mam plz do so many videos in electrical circuits. Digital ic gates are classified not only by their logic operation, but also by the specific logic circuit family to which it belongs. Ttl became the foundation of computers and other digital electronics. Microelectronics digital and analog circuits and systems, mcgrawhill book. The ecl emitter coupled logic families, originated in the late 1950s and remain the fastest chips available, but consume more power, and because they use a negative power supply of.

Characteristics of logic families watch more videos at. Integrated injection logic i 2 l family comparison of different logic families. Characteristics of logic families in digital electronics. Introduction of digital logic families miniature, lowcost electronics circuits whose components are fabricated on a single, continuous piece of semiconductor material to perform a highlevel function. Logic gate circuits are designed to input and output with only two types of signals high. Nand gate can be built using 4 mosfets 2nmos and 2pmos. Initially launched as straight 7400 series integrated circuits, this logic ic family has spawned many variants which has enabled it to remain in use until this day. Bipolar transistor transistor logic ttl first introduced by in 1964 texas instruments ttl has shaped digital technology in many ways standard ttl family e. Each such approach is called a specific logic family. Logic families based on the bipolar devices digital electronic. The digital ics are designed using any of either bipolar devices or mos or a combination of both.

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. Transistor transistor logic ttl emitter coupled logic ecl cmos logic family. Standard commercially available digital logic gates are available in two basic families or forms, ttl which stands for transistortransistor logic such as the. Types of logic families in digital electronics are ttl, cmos complementary metaloxide semiconductor, ecl, rtl, dtl. Characteristics of digital ics part 1 digital logic families tech gurukul by dinesh arya duration. Over the years, the most widely used overall family has been the 7400 series ics. In computer engineering, a logic family may refer to one of two related concepts.