What is the TTL standard?
Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors. TTL manufacturers offered a wide range of logic gates, flip-flops, counters, and other circuits. Variations of the original TTL circuit design offered higher speed or lower power dissipation to allow design optimization.
What is LS in TTL?
The TTL family of integrated circuits was introduced about 20 years ago by Texas Instruments. The letters LS indicate which subfamily the chip belongs to. Finally, the last two digits indicate the logical function performed by the chip.
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 is a TTL cable?
TTL is an old digital logic family. A “TTL to RS232” cable is a voltage level converter. Some electronic devices have a serial connection that is in RS232 format, but with voltage levels of 0 to 5V or less, while the RS-232 levels are a minimum of +/-5V, maximum of +/-15V.
What is the IC number of multiplexer?
List of ICs which provide multiplexing
| IC No. | Function | Output State |
|---|---|---|
| 74×153 | Dual 4:1 mux. | Output same as input |
| 74×352 | Dual 4:1 mux. | Output is inverted input |
| 74x151A | 8:1 mux. | Both outputs available (i.e., complementary outputs) |
| 74×151 | 8:1 mux. | Output is inverted input |
What is TTL voltage level?
TTL gates operate on a nominal power supply voltage of 5 volts, +/- 0.25 volts. Ideally, a TTL “high” signal would be 5.00 volts exactly, and a TTL “low” signal 0.00 volts exactly.
Is TTL analog or digital?
Transistor-transistor logic (TTL) is a digital logic design in which bipolar transistor s act on direct-current pulses. Many TTL logic gate s are typically fabricated onto a single integrated circuit (IC). TTL ICs usually have four-digit numbers beginning with 74 or 54.
Which is fast and LS TTL Data Book Motorola?
FAST AND LS TTL DATA f FAST AND LS TTL Low Power Schottky (LSTTL) has become the industry standard logic in recent years, replacing the original 7400 TTL with lower power and higher speeds. In addition to offering the standard LS TTL circuits, Motorola offers the FAST Schottky and TTL family.
What is the purpose of the TTL / MSI sn54 / 74ls151?
The TTL/MSI SN54/74LS151 is a high speed 8-input Digital Multiplexer. It provides, in one package, the ability to select one bit of data from up to eight sources. The LS151 can be used as a universal function generator to generate any logic function of four variables. Both assertion and negation outputs are provided.
What kind of circuit is in a Motorola TTL?
In addition to offering the standard LS TTL circuits, Motorola offers the FAST Schottky and TTL family. Complete specifications for each of these families are provided in data sheet form.
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