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Gate Type:
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Your choices are...
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Inverter
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Inverters, or NOT gates, have only one input and reverse the logic state. A true input produces a false output, and vice versa.
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Buffer / Driver
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Buffers are single-input devices, have a gain of 1, and mirror the input at the output. Buffers also have values for impedance matching and isolation of the input and output. Connecting two inverter gates so that the output of one feeds the input of another cancels the buffers’ inversion functions. In other words, there is no inversion from input to final output. This provides a practical application because gate circuits are signal amplifiers, regardless of the logic function that they perform. Two inverters can boost a weak signal source, one that is incapable of sourcing or sinking much current to load, without changing the logic level. The full current-sourcing or current-sinking capabilities of the final inverter remain available to drive load resistance, if necessary.
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AND
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With AND logic gates, 0 is called "false" and 1 is called "true". AND gates behaves like the logical operation "and".
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NAND
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NAND gates serve as an AND gate followed by a NOT gate. NAND gates behave like the logical operation “and” followed by negation. The output is “false” if both inputs are “true”. Otherwise, the output is “true”.
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OR
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OR gates behave like the logical inclusive "or". The output is "true" if either or both of the inputs are "true". If both inputs are "false", then the output is "false".
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NOR
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NOR gates serve as an OR gate followed by an inverter. NOR gates behave like the logical operation "or" followed by negation. The output is "true" if both inputs are "false". Otherwise, the output is false.
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XOR
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XOR gates (exclusive-OR) behave like the logical “either / or”. The output is "true" if either, but not both, of the inputs are "true". The output is "false" if both inputs are "false", or if both inputs are "true".
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XNOR
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XNOR gates (exclusive-NOR) combine an XOR gate followed by an inverter. XNOR gates behave like the logical "either / or", followed by negation. The output is "true" if the inputs are the same, and "false" if the inputs are different.
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Other
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Other unlisted gate types.
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Supply Voltage:
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The supply voltage (VCC) of the gate.
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Your choices are...
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-5 V
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The supply voltage (VCC) is -5 Volts.
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-4.5 V
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The supply voltage (VCC) is -4.5 Volts.
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-3.3 V
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The supply voltage (VCC) is -3.3 Volts.
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-3 V
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The supply voltage (VCC) is -3 Volts.
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1.2 V
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The supply voltage (VCC) is 1.2 Volts.
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1.5 V
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The supply voltage (VCC) is 1.5 Volts.
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1.8 V
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The supply voltage (VCC) is 1.8 Volts.
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2.5 V
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The supply voltage (VCC) is 2.5 Volts.
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3 V
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The supply voltage (VCC) is 3 Volts.
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3.3 V
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The supply voltage (VCC) is 3.3 Volts.
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3.6 V
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The supply voltage (VCC) is 3.6 Volts.
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5 V
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The supply voltage (VCC) is 5 Volts.
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Other
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Other unlisted supply voltages.
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Output Type
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Your choices are...
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3-State
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The output lines of 3-state gates can have three states: high, low, and high impedance. High impedance is equivalent to not being connected.
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Open Drain
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CMOS open drain outputs are a counterpart to TTL open collectors. Open drain devices require a pull-up resistor to achieve a true high state.
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Open Collector
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Open collectors have an output signal, provided by a transistor, that acts like a switch closure to ground when activated.
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Complementary output
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Gates with complementary outputs have two outputs: the true output and its complement. For example, an OR gate with a complementary output produces both the true output and its complement.
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Other
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Other unlisted output types.
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Logic Family
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Your choices are...
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Transistor-Transistor Logic (TTL)
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Transistor-transistor logic (TTL) is a class of digital circuits built from bipolar junction transistors (BJT), diodes and resistors. It is notable, as it was the base for the first widespread semiconductor integrated circuit (IC) technology. All TTL circuits operate with a 5 V power supply. TTL signals are defined as "low" or L when between 0 V and 0.8 V with respect to the ground terminal, and "high" or H when between 2 V and 5 V.
The first logic devices designed from bipolar transistors were referred to as standard TTL. The addition of Schottky diodes to the base collector of bipolar transistor was called Schottky logic (S-TTL). Schottky diodes shorten propagation delays within TTL by preventing the collector from going into what is called “deep saturation.” Other TTL technologies include low-power Schottky (LS-TTL), advanced Schottky (AS-TTL), advanced low-power Schottky (ALS-TTL), and low-voltage TTL (LVTTL).
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FAST
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Fairchild advanced Schottky TTL (FAST) technology was created in late 1970 when advances in IC technology allowed the speed and drive of S-TTL to be combined with the lower power of LS-TTL to form a new logic. An advanced related family is the FASTr, which is faster then FAST, has a higher driving capability (IOL, IOH), and produces much lower noise. The “r” in FASTr refers to the various speed grades, such as A, B and C, where an “A” designation means low speed and “C” means high speed.
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Standard CMOS / CMOS 4000
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Complementary metal-oxide semiconductor (CMOS) logic uses a combination of p-type and n-type metal-oxide-semiconductor field effect transistors (MOSFET) to implement logic gates and other digital circuits found in computers, telecommunications and signal processing equipment. It is the technology of choice for many present-day digital integrated circuits. CMOS 4000 refers to the series 4000 that is true CMOS with non-TTL levels.
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Fast CMOS
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Fast CMOS technology (FCT) was introduced in 1986. With this technology the speed gap between CMOS and TTL was closed. Since FCT is the CMOS version of FAST, it has the low power consumption of CMOS but speed comparable with TTL. Advanced versions of the FCT standard are FCTx and FCTx-T. The x in FCTx and FCTx-T refers to the various speed grades, such as A, B and C, where an “A” designation means low speed and “C” means high speed.
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High-Speed CMOS
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High-speed CMOS technology (HCMOS) is also known as HC / HCT. There are several basic flavors of HCMOS technology: high-speed CMOS (HC), high-speed CMOS with TTL input (HCT), advanced high-speed CMOS (AHC), and advanced high-speed CMOS with TTL inputs (AHCT).
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Advanced CMOS
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Advanced CMOS is a much higher speed version of HCMOS. It is also known as AC / ACT. Advanced CMOS technology comes in different flavors: standard advanced CMOS (AC), advanced CMOS with TTL inputs (ACT), advanced CMOS with quiet outputs (ACQ), advanced CMOS with TTL inputs and quiet outputs (ACTQ), advanced ultra-Low voltage CMOS (AUC), advanced ultra-low power CMOS (AUP), advanced very-low voltage CMOS (AVC), advanced low voltage HCMOS (ALVC), and advanced low voltage CMOS with bus hold (ALVCH). ACQ / ACTQ are second generation Advanced CMOS with much lower noise. While ACQ has the CMOS input level, ACQT is equipped with TTL level input.
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Low Voltage CMOS
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There are several low voltage CMOS technologies: standard low voltage (LV), low voltage high performance HCMOS (LVC), low voltage CMOS technology with TTL inputs (LVT), Low voltage with TTL inputs and high impedance (LVTC), advanced low voltage CMOS with bus hold (ALVCH), low voltage CMOS that operates with 3 V or 5 V (LCX), and low voltage CMOS that operates with 1.8 V or 3.6 V (VCX).
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BiCMOS
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BiCMOS is a SiGe Bipolar technology that combines the high speed of bipolar TTL with the low power consumption of CMOS. There are a number of BiCMOS flavors including advanced BiCMOS technology (ABT), advanced BiCMOS technology with enhanced transceiver logic (ABTE), advanced low-voltage BiCMOS (ALB), advanced low-voltage BiCMOS technology (ALVT), BiCMOS with TTL inputs (BCT), BiCMOS with backplane and transceiver logic (BTL), and low-voltage BiCMOS technology (LVT).
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Emitter Coupled Logic (ECL)
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Emitter coupled logic (ECL) uses transistors to steer current through gates that compute logical functions. By comparison, TTL and related families use transistors as digital switches, where the transistors are either cut off or saturated, depending on the state of the circuit. This distinction explains ECL's chief advantage: that because the transistors are always in the active region, they can change state very rapidly, so ECL circuits can operate at very high speed; and also its major disadvantage: the transistors are continually drawing current, which means the circuits require high power, and thus generate large amounts of waste heat. ECL gates use differential amplifier configurations at the input stage. A bias configuration supplies a constant voltage at the midrange of the low and high logic levels to the differential amplifier, so that the appropriate logical function of the input voltages will control the amplifier and the base of the output transistor. The propagation time for this arrangement can be less than a nanosecond. Other noteworthy characteristics of the ECL family include the fact that the large current requirement is approximately constant, and does not depend significantly on the state of the circuit. This means that ECL circuits generate relatively little power noise, unlike many other logic types that typically draw far more current when switching than quiescent, for which power noise can become problematic. ECL circuits operate with negative power supplies, and logic levels incompatible with other families, which means that interoperation between ECL and other designs are difficult. The fact that the high and low logic levels are relatively close mean that ECL suffers from small noise margins, which can be troublesome in some circumstances.
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Integrated Injection Logic (I2L)
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Integrated injection logic (I2L) is based on bipolar transistor logic. It is commonly referred to as "I-square-L."
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Silicon on Sapphire (SOS)
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Silicon on sapphire (SOS) is a hetero-epitaxial process wherein a thin layer of silicon is “grown” on a sapphire (Al2O3) wafer. SOS is part of the silicon on insulator (SOI) family of CMOS technologies. SOS is primarily used in military and space applications because of its inherent resistance to radiation. It has seen little commercial use to date because of difficulties in fabricating the very small transistors used in modern high-density applications. Problematically, the SOS process often results in the formation of dislocations from crystal lattice disparities between the sapphire and silicon. This leads to unusable wafers and drives up the production cost.
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Gallium Arsenide (GaAs)
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Gallium arsenide (GaAs) is a compound semiconductor mixing the strength of two elements, gallium (Ga) and arsenic (As). Gallium is a byproduct of the smelting of other metals, notably aluminum and zinc, and is rarer than gold. Arsenic is not rare, but it is poisonous. Gallium arsenide has many uses including being used in some diodes, field-effect transistors (FETs), and integrated circuits (ICs). GaAs components are useful at ultra-high radio frequencies and in fast electronic switching applications. GaAs devices generate less noise than most other types of semiconductor components and, as a result, are useful in weak-signal amplification applications. Gallium arsenide is used in the manufacture of light-emitting diodes (LEDs), which are found in optical communications and control systems. Gallium arsenide can replace silicon in the manufacture of linear and digital ICs. Digital devices are used for electronic switching, and also in computer systems.
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Crossbar Technology (CBT)
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Crossbar technology (CBT) enables a bus interface to function as a very fast bus switch, isolating the bus when the switch is open and offering very little delay when the switch is closed. Opening the switch provides circuit isolation (high impedance). Closing the switch provides a near-zero propagation delay through a 5-Ohm resistance. Bus switch technology is used in programmable logic devices (PLDs) for improved performance. Typically, CBT devices operate from 4.5 V to 5.0 V. CBT is also known as quick switch (QS), fast switch technology (FST), or Pericom Interface (PI5C).
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Gunning Transceiver Logic (GTL)
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Gunning transceiver logic (GTL) is a standard for electrical signals in CMOS circuits that is used to provide high data transfer speeds with small voltage swings.
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Other
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Other unlisted logic families.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Number of Inputs
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Logic gates can have one, two, or more inputs. Inverters and buffers have only one input. XOR and XNOR gates have two inputs. Most other gates have two or more inputs.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Tables:
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AND gate
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| Input 1 | Input 2 | Output | | 0 | 0 | 0 | | 0 | 1 | 0 | | 1 | 0 | 0 | | 1 | 1 | 1 |
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NAND gate
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OR gate
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| Input 1 | Input 2 | Output | | 0 | 0 | 0 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 1 |
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NOR gate
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| Input 1 | Input 2 | Output | | 0 | 0 | 1 | | 0 | 1 | 0 | | 1 | 0 | 0 | | 1 | 1 | 0 |
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XOR gate
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| Input 1 | Input 2 | Output | | 0 | 0 | 0 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 0 |
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XNOR gate
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| Input 1 | Input 2 | Output | | 0 | 0 | 1 | | 0 | 1 | 0 | | 1 | 0 | 0 | | 1 | 1 | 1 |
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Not gate
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