What are the features of TTL logic family?
Transistor Transistor Logic. Main feature is cheap and old technology. Drawbacks it has limited speed and fan IN-OUT.
TTL is a logic family. A logic family is the set of logic gates designed using a specific approach. Or simply speaking, logic family is the way of implementing logic. TTL stands for transistor - transistor - logic. It involves transistors (BJT) to implement logic. TTL applies means TTL logic family is used or can be applied in that specific application.
A: TTL ,RTL or any other family of logic devices have the same functions except these function characteristics are not similar in performance
Briefly, TTL uses more power than more modern families.
true and false
TTL stand for transistor transistor logic it could be DTL for diode or any other type of family.
TTL is faster and does not lose amplitude
TTL logic advantages:-speed of operations -reliability -noise immunity
A: The characteristic will be the same as DTL RTL TTL the logic will not change but the transfer function for each family is certainly different
The blocks in a logic gate depends on the logic family we use. A logic gate is designed using a specific logic family. The logic families can be DTL, TTL, CMOS etc. The blocks are different for different logic families. The various blocks in various logic families are: Diode logic: diodes and resistors DTL logic : diodes and resistors TTL logic : transistors and resistors NMOS logic: only NMOS FETs PMOS logic: Only PMOS FETs… Read More
TTL stands for "transistor-transistor logic" and consists of using BJT's ("bipolar junction transistors") to conduct the logic for the circuit.
ic refers to integrated circuits and ttl refers to transistor transistor logic. ttl is a family which provides the basic or former structure of logic gates for example different logic gates such as NAND,NOR etc can be made out with the help of transistors connected in a specific manner. integerated circuits are the combination of logic gates presented on a base with equal number of input pins . for example IC-7408 contains 14 pins
The switching time (on and off) of the TTL logic gate is very fast in comparison with CMOS logic gate. However, they could not tolerate higher range of power supply.
DRL cannot invert signals.
transistor transistor logic
To know about the advantages of TTL logic family, one should have a basic idea about RTL, DTL etc. Diode logic (DL) uses diodes to implement logical functions like AND and OR. But the disadvantage is that it can not perform NOT operation. As AND and OR are not complete functions by themselves, they can not perform several logic functions without NOT. Hence, there was a need for some device which can perform a NOT… Read More
it is in micro seconds
In electronics TTL stands for Transistor Transistor Logic.
because TTL have a bias input setup to eliminate noise therefore the output will follow the logic one input if left open
A: TTL-DTL-RTL are family of gates called by the name. Example TTL means Tran. trans. logic. It refers to the inputs for these gates as the type. T= Transistor D=Diode R=Resistor While they do perform the same function their characteristics in performance varies greatly.
Compatibility in TTL means that the output of one TTL device can be used to drive the Input of the other TTL device , This because the low and high output window fit inside the low and high input window/profile TTL stand for Transistor Transistor Logic, so any voltage between 0 and 5 volt is compatible where any voltage between 3V and 5V is logic 1 and zero volt is logic 0
I believe you mean low power, not low energy. TTL is typically lower power than ECL, but not always. Some TTL devices have been higher power than similar ECL devices.
One standard load is the load of a typical input of a specified logic family. This is more relevant with bipolar logic families (e.g. RTL, DTL, TTL, ECL, I2L) than MOS logic families (e.g. NMOS, CMOS). Outputs of devices in these logic families are then rated by the number of standard loads they can drive. However when crossing between logic families (e.g. LS TTL to S TTL) the concept of standard loads is less useful… Read More
because the amplifying function are performed by transistors (contrast with RTL and DTL).
Transistor Transistor Logic
5 Volt Is the standard, but any voltage between 3.5 and 5.2 is logic 1 in CMOS and TTL
A logic family is the type of components used to make logic gates on an IC. Some include: RTL: Resistor-Transistor Logic DL: Diode logic TTL: Transistor-Transistor Logic - used in 7400 series chips CMOS: Complimentary Metal Oxide - used in 4000 series chips ECL: Emitter-coupled Logic RTL and DL are rarely if ever used for actual chips. CMOS chips can be destroyed by too much static electricity.
Here are the propagation delays for these gates a) ECL = 2ns b) TTL = 1.5-33ns depending on the type of TTL. Conventional TTL is 9ns, Advanced Schottky TTL is 1.5ns c) RTL = 25ns d) CMOS = 5-20ns depending on if it is conventional CMOS, TTL pin compatible CMOS, high speed TPC CMOS or TTL compatible CMOS So the fastest would be the Advanced Schottky TTL (74ASxx) at 1.5ns but the choice simply said… Read More
It's the "family" the device belongs to. The 74151 is the original Transistor-Transistor Logic (TTL) device. The 74L151 is the low-power ("L") version. Slower than the original TTL family. Others are: S - Schottky (high-speed) LS - low-power high speed. About equivalent in speed to the original TTL, but lower power. ALS advanced low-power high-speed C - Complementary Metal-Oxide Silicon, which uses a different technology (CMOS rather than bipolar transistors), but conforms to the "74"-series… Read More
Because in ECL logic Transistors doesn't go to saturation region hence saving the recovery time and making this family the faster.
I believe that is resistor transistor technology TTL transistor transistor logic
ECL or emitter coupled logic is faster than TTL type logic because the switching transistors do NOT go into saturation in either the on or off state. The switching time from saturation in a high output to saturation in a low state like TTL requires that the junction capacitance be overcome and that the charge in the saturated junction get swept out. ECL is sensitive to a threshold level only.
What we now know as TTL or Transistor to Transistor Logic is one way of building a computer chip. This has been done by a complex series of steps of manufacture that wasted much of what was made. TTL is used in instruments but the details of what instruments are used to make TTL these days in very technical and complex
Transistor-transistor logic (TTL) is a class of digital circuits built from bipolar junction transistors (BJT) and resistors. It is called transistor-transistor logic because both the logic gating function and the amplifying function are done by transistors. To know about the advantages of TTL logic family, one should have a basic idea about RTL, DTL etc. Diode logic (DL) uses diodes to implement logical functions like AND and OR. But the disadvantage is that it can… Read More
Since CMOS can be NAND and NOR logic this question seems to make little sense. However. If you by any chance think about CMOS Design versus TTL Design then this is a most interresting question. CMOS drain little current at low speed. As speed increases, the drain increases. TTL drain much the same current no matter the speed. There have been made TTL families that only use a little current. This will some times make… Read More
74LS08 is a quad two-input AND gate with LS-TTL logic levels.
Yes, standard 5V powered DTL and TTL devices are fully input/output logic level and fanout compatible. However DTL chips are nearly impossible to find today. The only thing to be careful about is old DTL based designs often used wired-and gates (i.e. directly tying outputs of several gates together to reduce part count). You cannot do this with normal TTL!
The easiest way is to use a logic family such as CMOS that can operate at supplies up to 15 volts. If you're using 5-volt TTL, the only way to get more than about 4 volts signal output is to use a transformer.
Unused ttl inputs would normally default to logic 1 if left floating. but these inputs could act as antennas under certain conditions and they could pick up noise which can cause the circuit to malfunction.
Unused TTL inputs should never be left open. Depending on how their logic levels will affect the operation you want from the device, unused inputs should always be tied to either the +5v supply (logic 1) or to the circuit ground (logic 0). If an input is left open ("floating"), then it can assume either logic level, and you literally never know which state it's in.
A digital circuit composed of bipolar junction transistors (BJTs). Widely used in all variety of electronic applications, especially prior to CMOS circuits becoming popular, TTL superseded the earlier RTL (resistor-transistor) and DTL (diode-transistor) logic designs, which used more power. In TTL, transistors are used to both isolate inputs and perform the logic switching. A "TTL" designation on a circuit input or output indicates a digital circuit rather than analog. Read more: http://www.answers.com/topic/transistor-transistor-logic-electronics#ixzz1P9e2ZtH4
ECL is the fastest logic family.
by using buffers however while the logic function for each family remains the same incompatibility is clearly evident. ANSWER: On a single chip it would be handled internally as an example TTL input CMOS output or vice verse
vcc-voltage collector to collector vdd- voltage deran to deran ttl- transister transister logic cmos - complementary metal oxide same conductor
The biggest difference is the types of transistors used: TTL (transistor transistor logic) uses bipolar junction transistors, MOS (metal oxide semiconductor) uses metal oxide semiconductor field effect transistors. For a very long time TTL operated at much higher speeds than MOS logic, but also used much more power. However several improvements in MOS over time eventually allowed it to operate at higher speeds than TTL could do without consuming so much power that it could… Read More
The comparison between the CMOS and TTL logic families are as follows: property TTL CMOS power consumption High:20mw Low:1mw Operating current High:mA range Low micro-ampere range Power supply 5v+ or -0.25vdc 3v to 15vdc Switching speeds Fast:10ms Slow :100ns Input impedance Low High fan-out 10 50
A: LOGIC can perform a function by many different IC like an "AND" gate the family of logic distinguish some performance in ability CMOS TTL DTL RTL etc each of these family of IC have 'AND' gates but each are not compatible to each other while the "AND" function remain the same ANSWER: A logic family imply IC that behave the same when used in a certain way they may perform the same functions but… Read More
The 74 indicates a general use IC, the 54 indicates a military specification device with a greater operating temperature range. These two prefixes were originally assigned in the 1960s by Texas Instruments for their TTL logic family, but have since become de facto industry standards. They were also adopted for CMOS in the 1980s when it was decided that having common package pinouts would make it easier for both logic designers and circuit board layout… Read More
TTL is faster than diode-transistor logic, and does both amplification and logical operations. While they are rather obsolete for most modern designs, they are good for simple and specialized products. So if you need a simple design that other people may need to modify later, then TTL circuits might be more feasible than using a microprocessor. TTL circuits are simple, well-documented, and well-understood. TTL circuits are also good for using for teaching purposes.
Power:- TTL 5v, CMOS 1.8 to 15v. TTL much more power hungry than CMOS. CMOS more susceptible to static than TTL. CMOS power required is small especially when static and increases with clocking frequency. TTL threshold levels < 0.8V low, >2.4V high. CMOS threshold levels < 50% of rail low, >50% high, therefore greater noise immunity.