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Access Time
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A measurement of time in nanoseconds (ns) used to indicate the speed of memory. Access time is a cycle that begins the moment the CPU sends a request to memory and ends the moment the CPU receives the data it requested. Specifically, for a synchronous device it is the time, usually in ns, from a clock edge to when data is available at the output of a device. For an asynchronous device it is the time from the initiation of the read cycle to when the data output is available.
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Search Logic:
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All matching products will have a value less than or equal to the specified value.
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Operating Current
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The minimum current needed for active chip operation.
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Search Logic:
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All matching products will have a value less than or equal to the specified value.
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Standby Current
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The minimum current needed for the operation of the chip while it is inactive.
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Search Logic:
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All matching products will have a value less than or equal to the specified value.
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Power Dissipation
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Power dissipation is the total power consumption of the device. It is generally expressed in watts or milliwatts.
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Search Logic:
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All matching products will have a value less than or equal to the specified value.
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OTP
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One-time Programmable (OTP) device.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Supply Voltage:
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Your choices are...
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-5 V
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The chip operates with -5 volts.
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-4.5 V
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The chip operates with -4.5 volts.
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-3.3 V
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The chip operates with -3.3 volts.
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-3 V
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The chip operates with -3 volts.
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1.2 V
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The chip operates with 1.2 volts.
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1.5 V
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The chip operates with 1.5 volts.
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1.8 V
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The chip operates with 1.8 volts.
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2.5 V
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The chip operates with 2.5 volts.
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2.7 V
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The chip operates with 2.7 volts.
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3 V
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The chip operates with 3 volts.
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3.3 V
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The chip operates with 3.3 volts.
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3.6 V
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The chip operates with 3.6 volts.
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5 V
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The chip operates with 5 volts.
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Other
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Other unlisted supply voltages.
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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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Logic Family
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Your choices are...
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L
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Low power (L).
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S
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Schottky (S).
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H
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High speed (H).
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LS
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Low power Schottky (LS).
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AS
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Advanced Schottky (AS).
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ALS
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Advanced low power Schottky (ALS).
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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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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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HCT
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High-speed CMOS with TTL inputs (HCT).
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AHC
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Advanced high-speed CMOS (AHC).
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AHCT
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Advanced high-speed CMOS with TTL inputs (AHCT).
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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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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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ACT
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Advanced CMOS with TTL inputs (ACT).
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ACQ
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Advanced CMOS with quiet outputs (ACQ).
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ABT
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Advanced BiCMOS technology (ABT).
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ABTE
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Advanced BiCMOS technology with enhanced transceiver logic (ABTE).
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ABTH
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Advanced BiCMOS technology with bus hold (ABTH).
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BCT
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BiCMOS with TTL inputs (BCT).
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BTL
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BiCMOS with backplane and transceiver logic (BTL).
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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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Futurebus (FB)
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Futurebus (FB) and Futurebus+ are back-plane bus specifications that define both the physical and electrical layers. Both bus types can use either asynchronous or synchronized protocols. When operating with 256 bit transfers, the data rate may be as high as 3200MBps. Futurebus bus widths start at 32 bits wide, while Futherbus+ may have widths may up to 256 bits. Bus widths of 32, 64,128 and 256 are possible at a clock rate of 100MHz. Futurebus card size is defined as 300mm x 300mm, and uses 2mm style connectors.
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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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GTLP
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Gunning with transceiver logic plus (GTLP).
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ALB
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Advanced low voltage BiCMOS (ALB).
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LV
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Standard low voltage CMOS (LV).
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LVC
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Low voltage high performance HCMOS (LVC).
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LVCH
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Low voltage CMOS with bus hold (LVCH).
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ALVC
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Advanced low voltage CMOS (ALVC).
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LVT
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Low voltage CMOS technology with TTL inputs (LVT).
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LVTZ
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Low voltage CMOS technology with TTL inputs and high impedance (LVTZ).
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ALVCH
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Advanced low voltage CMOS with bus hold (ALVCH).
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LCX
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Low voltage CMOS (LCX) operates with 3 V or 5 V.
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VCX
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Low voltage CMOS (VCX) that operates with 1.8 V or 3.6 V.
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CBTLV
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Low-voltage CBT (CBTLV) features simple N-channel and P-channel metal-oxide semiconductor (MOS) transistors optimized for 3.3 V operation while maintaining low propagation delays and low current supply.
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CMOS 4000
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CMOS 4000 refers to the 4000 series that is true CMOS with non-TTL levels.
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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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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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Other
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Other unlisted or proprietary logic families.
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Search Logic:
|
|
Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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