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What ICs are used in this rocket?

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tom66:

--- Quote from: coppice on May 04, 2024, 11:26:07 am ---
--- Quote from: tom66 on May 03, 2024, 09:51:06 pm ---For anyone who is curious as to the answer rather than just with Faringdon being a troll  :).

Radiation-hardened FPGAs and microcontrollers/SoCs most likely if they are "old space". 

Or they could be using consumer devices with higher tolerance to single event upsets which is the SpaceX ("new space") approach - reasonably normal computers (they use x86 Intel processors of one kind or another) but with much redundancy and self-checking. See here:  https://space.stackexchange.com/questions/9243/what-computer-and-software-is-used-by-the-falcon-9

--- End quote ---
That thread seems to imply that radiation hardened ICs and large scale redundancy are alternatives, but that's not really true. The two have usually been combined to achieve acceptable results.

--- End quote ---

Right, but the approach SpaceX take is to tolerate SEUs in the downstream computers and correct them at the engine/controller level with much cheaper hardware which can be adequately radiation hardened without increasing the cost of the avionics too much.

Whereas the approach for "old space" might be to use rad-hard hardware everywhere and design for minimum fault occurrence.  See for instance the Space Shuttle computers, which were quintuple redundant (two could be lost with mission still OK to proceed; three with normal landing parameters; and four with a safe landing still possible) but these were also radiation-tolerant systems with much slower, older process geometry.  Practically everything on the craft will have been rad-hardened because "that's just how you do it".

5U4GB:

--- Quote from: EPAIII on May 04, 2024, 10:43:58 am ---
--- Quote from: Kim Christensen on May 03, 2024, 08:30:29 pm ---They use space age technology.   ::)

--- End quote ---

And aircraft aluminum. Billet only, of course.

--- End quote ---

Not aluminium, Chinesium.  At first glance it looks exactly like aluminium and is priced as such, but then once the return window has closed you find out it doesn't conduct electricity and dissolves in seawater.

Faringdon:

--- Quote ---Now you're asking us again about stuff the commies have? All your "schematics" use Linear Tech parts - the most expensive in the business.
--- End quote ---
Thanks, so do the Chinese have these kind of speciality  power supply control chips like the Analog.com ones, and the ti.com ones etc etc?
..but they just dont sell them to the rest of the world?
..or..So you are saying they only make the "big stuff"?, like the motors etc?

mikeselectricstuff:

--- Quote from: Faringdon on May 05, 2024, 10:27:55 am ---
--- Quote ---Now you're asking us again about stuff the commies have? All your "schematics" use Linear Tech parts - the most expensive in the business.
--- End quote ---
Thanks, so do the Chinese have these kind of speciality  power supply control chips like the Analog.com ones, and the ti.com ones etc etc?
..but they just dont sell them to the rest of the world?
..or..So you are saying they only make the "big stuff"?, like the motors etc?

--- End quote ---
They do - plenty of PSU ICs available on LCSC, they're just harder to find due to LCSC's poor parametric search and the datasheets being in Chinese.

5U4GB:

--- Quote from: mikeselectricstuff on May 05, 2024, 10:52:54 am ---They do - plenty of PSU ICs available on LCSC, they're just harder to find due to LCSC's poor parametric search and the datasheets being in Chinese.
--- End quote ---
You can also see this in action sometimes when disassembling different generations of Chinese-made electronics, older versions will have recognisable parts in them, then they'll start sprouting vaguely-similar Chinese equivalents with minimal info available, and finally completely alien parts with no info available.  It's a bit like the SF movie/story Screamers / Second Variety which starts out with known devices and then over time they become more and more alien.

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