What are the characteristics of TTL?
The features of the TTL family include the following.
- Logic low level is at 0 or 0.2V.
- Logic high level is at 5V.
- Typical fan out of 10.
- A basic TTL device draws a power of almost 10mW, which reduces with the use of Schottky devices.
- The average propagation delay is about 9ns.
- The noise margin is about 0.4V.
What are the advantages of TTL gate?
Advantages of Transistor-Transistor Logic or TTL
- TTL provides very high speed.
- TTL is more reliable.
- TTL needs lowe power for any operation.
- TTL can stack the transistors to make for fast pull up and pull down.
- TTL circuits are not so complicated.
What is the meaning of TTL in logic gates?
Transistor–transistor logic
Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the logic function (the first “transistor”) and the amplifying function (the second “transistor”), as opposed to resistor–transistor logic (RTL) or diode–transistor logic (DTL).
What are the types of TTL NAND gate?
The basic building block of this logic family is NAND gate and there are various subfamilies of this logic gate those are standard TTL, advanced Schottky TTL, schottky TTL, low power TTL, high power TTL, fast TTL etc.
What is the full meaning of TTL?
2, The full form of TTL is Time to live. It’s used on Computing ,Networking in Worldwide. Time to live (TTL) is mechanism that limits the lifespan of data in a computer or network. TTL may be implemented as a counter or timestamp attached to or embedded in the data.
What is TTL explain how is it used?
Transistor-transistor logic (TTL) is a digital logic design in which bipolar transistor s act on direct-current pulses. A TTL device employs transistor s with multiple emitters in gates having more than one input.
What are the merits and demerits of the TTL family?
Advantages and Disadvantages of TTL Logic Gates
- TTL family is the fastest saturating logic family (working in between the saturation and cut-off modes).
- Typical supply voltage is only +5 V with a permitted variation of ±0.25 V.
- It has good noise immunity.
- Power dissipation is in the range of several mW only.
What are the advantages of TTL over CMOS?
The advantage of the CMOS over the TTL chips is that the CMOS has a higher density of logic gates within the same material. TTL chips consume more power as compared to the power consumed by the CMOS chips even at rest. The power consumption of the CMOS depends on various factors and is variable.
What is the TTL NAND gate?
A TTL NAND gate logic circuit has at least four bi polar junction transistors in which the input (transistor which receives input) has two emitters. The output is taken between the emitter and collector of two different transistors.
What are the different types of output configuration in TTL?
In any case, TTL gates in all the available series come in three different types of output configuration:
- Open-collector output.
- Totem-pole output.
- Three-state output.
What is TTL and how it works?
Time to live (TTL) or hop limit is a mechanism which limits the lifespan or lifetime of data in a computer or network. Once the prescribed event count or timespan has elapsed, data is discarded or revalidated. In computer networking, TTL prevents a data packet from circulating indefinitely.
What are the different types of TTL?
We will discuss about few of them in this article. TTL subfamilies. The TTL family consists of various subfamilies such as standard TTL, low-power TTL, high power TTL, low power Schottky TTL, Schottky TTL, advanced low-power Schottky TTL, advanced Schottky TTL and fast TTL.
What are the different families of TTL microcontroller?
TTL, CMOS, ECL, NMOS and Bi-CMOS are the families which are still used. We will discuss about few of them in this article. TTL subfamilies. The TTL family consists of various subfamilies such as standard TTL, low-power TTL, high power TTL, low power Schottky TTL, Schottky TTL, advanced low-power Schottky TTL, advanced Schottky TTL and fast TTL.
How does TTL compare with other logic families?
TTL Comparison with Other Logic Families Specifications TTL CMOS ECL Noise Immunity Strong Extremely Strong Good Noise Margin Moderate High Low TPD in ns 1.5 to 30 1 to 210 1 to 4 Clock Rate in MHz 35 10 >60
What is the minimum IOL required for the TTL family?
For example, for the standard TTL family, the minimum guaranteed IOL is 16 mA, which can drive 10 standard TTL inputs with each requiring 1.6 mA in the LOW state, as shown in Fig. 5.2 (b). • HIGH-level off-state (high-impedance state) output current, IOZH .