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How does transistor-transistor logic work?
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 is a TTL circuit?
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). A TTL device employs transistor s with multiple emitters in gates having more than one input.
What are the three types of output configuration for TTL?
There are three types of output stage that 7400 series logic may possess.
- Totem pole: This output is the standard output format for 7400 series logic chips.
- Open collector: This form of output has a single transistor with its emitter connected to 0V.
- Tri-state: This form of output has three states as the name implies.
What is TTL output?
TTL is an acronym for Transistor-Transistor Logic. VOH — Minimum OUTPUT Voltage level a TTL device will provide for a HIGH signal. VIH — Minimum INPUT Voltage level to be considered a HIGH. VOL — Maximum OUTPUT Voltage level a device will provide for a LOW signal.
What is the theory of a TTL circuit?
Transistor-transistor logic (TTL) is a class of digital circuits made from bipolar junction transistors (BJT) and resistors. This is termed as transistor-transistor logic since both the logic gating function (example: AND) and the amplifying function are executed by the transistors (contrary with DTL and RTL).
What is TTL logic voltage level?
TTL Logic Levels A majority of systems we use rely on either 3.3V or 5 V TTL Levels. TTL is an acronym for Transistor-Transistor Logic. It relies on circuits built from bipolar transistors to achieve switching and maintain logic states.
What is transistor equivalent circuit?
Transistor equivalent circuit It should be observed in the following examples that one cannot directly analyze transistor circuits using nodal analysis because of the potential difference between the terminals of the transistor . Only when the transistor is replaced by the equivalent model can we apply nodal analysis.