Questions tagged [standard]
For questions about technical standards such as IEEE standards. Examples of such questions include: what a standard requires, how to meet the requirements of a standard in a circuit design, what capabilities and limitations a circuit designer can assume when incorporating a standards-compliant component in a design, etc.
265 questions
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Who updated the symbols for MOSFETs and when did it happen?
This is a question about the history of electronic symbols and standards.
I'm finally starting to learn how discrete devices actually work from the entertaining yet incredibly insightful and ...
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Applying UL746C to devices powered from limited-energy circuits
Backstory:
UL 864 (among other standards, I reckon) says "use the applicable provisions of UL 746C" to determine the required ratings for plastic cases housing devices Listed to the product ...
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Operation Endurance Test Duration of DC-DC converter for EV
I am in the process of designing testing procedures for an EV DC-DC converter. I have looked up relevant global standards.
One of the standards I am referring is ISO 21782-7: "Electrically ...
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VME 64x 6U Board standard dimension
I need to build a standard VME64x board 6U, without the P0 connector, only with P1 and P2.
This is my first time building a board like this, and the first thing I need is the mechanical dimensions of ...
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PCB clearance and creepage requirements for 1.5kVDC isolation
I need to purchase the relevant standard, but don't want to spend money purchasing the wrong standard.
Can PCB creepage and clearance guidance for 1.5kVDC be found using IPC-2221C?
Is that the ...
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What type of FEC is used in DDR4 and DDR5 ECC RAM?
This was surprisingly hard to research, as when you naively type in "ECC" and "DDR5", you get of course a thousand results of companies trying to sell you hardware, but all the ...
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Meaning of 'dead code' in MISRA C standards [closed]
Going through MISRA C 2012 rules, I Noticed one rule about dead code and was a little unclear about the definition of "dead code"
Rule 2.2 States that "There shall be no dead code"
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Is there any agreed-upon set of characters for manufacturers to use in their electronic component part names?
Is there an industry standard for the character set used for electric/electronic manufacturer part names/numbers? More specifically, are there printable, non-whitespace characters that are not used in ...
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DIN 46228-1 technical standard (uninsulated ferrules) - only paid version available? [closed]
Question is regarding DIN 46228-1 technical standard (uninsulated ferrules) - only paid version available or it is publicly available? Why these kind of standards are not public?
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How to encode information on top of a protocol?
I often build appliacations where a variety of information is exchanged on top of a protocol like UART, I2C, or CAN. For example: this could be a two-wheeled robot wherein the SBC and a slave ...
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What rule or standard is used to assign a SOT number to a chip housing?
I studied the datasheets of some Philips chips and found that they housing have several designations. In particular, many packages are signed like DBS9P (as I ...
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How is the AWG rating of a ribbon cable interpreted?
Suppose a ribbon cable rated 24 AWG. Does the implied current limit apply to each conductor separately or to the overall ribbon if all conductors are used in parallel? Or in other words, how much ...
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Why are there no 12V/5A USB PD chargers/batteries?
Any 100W USB PD 3.0 system must support 20V/5A charging. Naively I assumed that therefore they should support 5A at any of the lower voltage rails! But for some unclear reason, I cannot find any PD ...
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What are the hole dimensions for 0.1" pitch headers?
What are the hole dimensions for 0.1" pitch headers?
As discussed in How to breadboard with large lead components (such as TO-220)?, holes on standard 0.1" pitch headers are:
Rectangular (...
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USB A mechanical orientation?
This concerns a USB A socket on a PCB.
Is there a standard or preferred orientation of the polarization tab, either up or down?
The picture shows one with tab towards the top
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