Part of the Microprocessors glossary: Transistor-transistor logic is a digital logic design in which bipolar transistor s act on direct-current pulses.
However, real TTL gate circuits cannot output such perfect voltage levels, and are designed to accept “high” and “low” signals deviating substantially from these ideal values. “Acceptable” input signal voltages range from 0 volts to 0.8 volts for a “low” logic state, and 2 volts to 5 volts for a “high” logic state. TTL stands for Transistor-transistor logic (transistor-transistor logic), is a class of digital circuits built from bipolar junction transistors (BJT) and resistors. It is called transistor-transistor logic because both the logic propagation function and amplifying function are performed by transistors. CMOS gate circuits have input and output signal specifications that are quite different from TTL. For a CMOS gate operating at a power supply voltage of 5 volts, the acceptable input signal voltages range from 0 volts to 1.5 volts for a “low” logic state, and 3.5 volts to 5 volts for a “high” logic state. 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. (3) Short for through-the-lens it is a name for the LCD screen on a digital camera that shows what is projected onto the sensor by the lens. This is an alternate to using the optical or electronic viewfinder. Also called a TTL (1) Short for transistor-transistor logic, a common type of digital circuit in which the output is derived from two transistors. The first semiconductors using TTL were developed by Texas Instruments in 1965. The term is commonly used to describe any system based on digital circuitry, as in TTL monitor. Part of the Microprocessors glossary: 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.
http://www.allaboutcircuits.com/textbook/digital/chpt-3/logic-signal-voltage-levels/ http://supreemcircuits.blogspot.com/2014/05/what-is-ttl-digital-electronics-ttl.html http://www.allaboutcircuits.com/textbook/digital/chpt-3/logic-signal-voltage-levels/ http://whatis.techtarget.com/definition/transistor-to-transistor-logic-TTL http://www.webopedia.com/TERM/T/TTL.html http://www.webopedia.com/TERM/T/TTL.html http://whatis.techtarget.com/definition/transistor-to-transistor-logic-TTL
ttl meaning electronics