Sold out?

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I was just finishing a new protoype design when I found out that the microcontroller that I had chosen is now (almost) sold out everywhere.

 

https://octopart.com/at90usb1287...

 

What's happening here?  The AT90USB1287 is not a brand new type, but according to the Atmel site it is still "In Production". That means that it should be fine for new designs, right?

Are the "Non-Authorized Stocking Distributors" buying up all stocks to later sell them for higher prices?

 

What would be your advice?

A lot of the development of the past months has been specifically for this chip. Developping usb services and tweaking for lowest power consumption. Hardware is still in prototype stage, so it's not too late to switch to another chip.

The software is based on LUFA, so it would be nice if another chip would support this too. But a quick look shows that other chips supported by LUFA have stock problems too. Maybe something entirly different? Would it be feasable to port LUFA to a yet unsupported chip? 

My main concerns are: the chip has to support USB (in host mode) and have good low-power cababilities (it will run on battery)

 

Or get them from the Non-Authorized Stocking Distributors after all?  Does anyone have experience with such companies?

 

 

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hneel wrote:
What's happening here? 

Have you not noticed there's global supply-chain problems? and that includes chips.

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A major chip factory burned down! New ones are being built but will take until 2024 to get up and running fully! We are adjusting our PCB's layout to take multiple alternative chips depending on supply at the time of population... 

 

Keys to wealth:

Invest for cash flow, not capital gains!

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Income is proportional to how many you serve!

Lets go Brandon!

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hneel wrote:
What's happening here? 
Lead frame shortage (some packages have greater availability)

hneel wrote:
That means that it should be fine for new designs, right?
Yes

hneel wrote:
Are the "Non-Authorized Stocking Distributors" buying up all stocks to later sell them for higher prices?
To sell now at greater prices (economics' supply and demand)

hneel wrote:
What would be your advice?

  • QFN until the QFP logjam resolves
  • monitor lead time (purchasing leads manufacturing as semiconductors are long lead time)
  • refurbish PCBA
  • patch PCBA
  • if precursor parts are available then revert PCBA
  • redesign PCBA (Tesla Motors though IIRC their system design is one computer instead of many distributed computers)

QFN may be a no-go due to temperature cycling (consider underfill)

Patience as shortage of AVRe+, and etc, will resolve "sometime" during '22.

hneel wrote:
... so it's not too late to switch to another chip.
Which MCU?

ATXMEGA128A1U but XMEGA is in a worse shortage than AVRe+.

hneel wrote:
Maybe something entirly different?
Indeed; options by RISC-V.

hneel wrote:
Would it be feasable to port LUFA to a yet unsupported chip? 
Yes though some RTOS will have a USB add-on; some frameworks have USB.

hneel wrote:
the chip has to support USB (in host mode) 
oh

 


ATMEL parts are running out of stock due to wafer shortage ? | AVR Freaks

 

https://www.microchipdirect.com/product/search/all/AT90USB1287

Lead Time | World's Largest Inventory of Microchip Products

Underfill revisited: How a decades-old technique enables smaller, more durable PCBs - Embedded.com

 

XMEGA Lead Time, Dec'20 | AVR Freaks

 

ASF-USB | ASF Source Code Documentation

 

"Dare to be naïve." - Buckminster Fuller

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try a broader search

 

https://octopart.com/search?q=AT...

 

How many chips do you need?  

5? 10? 200?

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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IIRC, Octopart's lead time data was demonstrated for quite sometime.

Might not have to run all BOM against lead time though would be prudent to do semiconductor lead time analysis once per week with cognizance of actualized risks (the MLCC crisis ... what else?)

API Registration | Octopart

 

"Dare to be naïve." - Buckminster Fuller

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gchapman wrote:
Lead frame shortage (some packages have greater availability)

I can understand Fab shortage, Wafer shortage,  Die shortage,  Package and Test facility shortage, ...

 

Surely Lead Frames are just metal stampings.   They could be manufactured by thousands of companies in any quantities you desire.   Obviously subject to strict quality controls.

 

Surely a QFN or a QFP is just a different shape of stamping.

 

David.   (who confesses ignorance)

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david.prentice wrote:
Fab shortage,
AT90USB1287 didn't make the transition to Tempe; might be wafer fab'd only in Colorado Springs though wouldn't be a surprise if SMIC wafer fab these.

david.prentice wrote:
Obviously subject to strict quality controls.
Indeed; there are very recent Microchip PCN that state a lead frame change (sizing, material) for a given existing die.

 


Tempe Fab 2, Gresham Fab 4 | AVR Freaks

Product Change Notifications | Microchip (enter AT90USB1287)

SMIC-Fab Information

 

"Dare to be naïve." - Buckminster Fuller

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BIG NEWS TODAY

 

Seoul (CNN Business)Samsung is planning to build a $17 billion semiconductor manufacturing facility in Texas as part of efforts to tackle a global shortage of chips.

Announcing its largest ever investment in the United States, the South Korean electronics giant said Tuesday that the factory would create 2,000 high-tech jobs directly, and thousands more in the local economy once it is in full operation. The facility is expected to begin operations in the second half of 2024

 

 

So it's just a matter of waiting a few weeks! cheeky

 

 

 

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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This is becoming a real dilemma! A huge development investment into a hardware platform that becomes unexpectedly unavailable as the product gets ready for production.  I don't know what to suggest as a real-world "solve this now" approach to this, except to continue to explore for sources of this device in low quantities.

 

In the long run, that is, for over-one-year strategy, you could look into a second alternative solution that uses a 32-bit CPU with lots of capabilities that won't get used in your application.  For example, the Espressif ESP32-S2 is new version of a CPU module board that is marketed on its WiFi Internet/Bluetooth features.  This new ESP32 version has internal built-in OTG USB hardware, which means that it can act as a host.  If I understand the literature right, the unit can run at battery-support levels of power if the WiFi/Internet/Bluetooth circuitry is shut-down by software. 

The AliBaba website lists this module in the $4-$8 range per unit.  Possibly because it is perceived as a IoT device, it is "under the RADAR" to the high-volume CPU buyers and might still be available in quantities of 100+. 

 

Maybe you can get some low-cost interns from the local university or some under-employed technicians to set up a 'skunkworks' that can facilitate moving your company's applications and products between the AVR, ESP, and AVR families.

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gchapman wrote:
Indeed; there are very recent Microchip PCN that state a lead frame change (sizing, material) for a given existing die.

 

A metal stamping still seems relatively low-tech compared to the rest of the Wafer fabrication.

I would assume that the stamping would be dependent on the package rather than the specific die that gets wire-bonded to that Lead Frame.

 

David.

 

p.s. perhaps I should stick to cows.   Much more straightforward.

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Simonetta wrote:
This new ESP32 version has internal built-in OTG USB hardware, which means that it can act as a host. 
In 16b MCU, VNC2 have good stock levels.

Some USB 8051 have USB host.

So, attach a USB HCI to your preferred AVR.

 

USB Host Series IC`s - FTDI

VNC2-32L1C - FTDI

https://octopart.com/search?q=vnc2&currency=USD&specs=0&manufacturer_id=1051&in_stock_only=1

MCU series chip - Jiangsu Qinheng Co., Ltd. (WCH)

WCH MCS-51(8051) USB MCUs | AVR Freaks

 

"Dare to be naïve." - Buckminster Fuller

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The die are bonded to the lead frame's paddle; a few factors for paddle sizing is heat transfer and mechanical vibration.

From the qualification report on some mega168 (via searching for mega3208)

GBNG-06LXXH156 | Product Change Notification | Microchip

...

 

Title

CCB 2856 Final Notice: Qualification of Microchip Fabrication site (FAB 4) for selected Atmel products manufactured with the 59.91K process technology.

 

...

 

Affected CPNs

GBNG-06LXXH156_Affected_CPN_06252018.pdf

...

 

Attachments

PCN_GBNG-06LXXH156_Qual_Report.pdf

[page 2 for lead frame data, page 3 for lead frame related tests]

 

P.S.

re cows, laugh  glad you don't mind manure on your trouserswink

 

P.P.S.

Cows and embedded systems : a relative few cows died here during Storm Uri (broke through the ice on a stock pond then stuck in the pond's mud so quickly passing due to loss of body temperature)

Calving is typically late winter into early spring so ranchers also lost a calf.

Infrared body temperature sensors are tiny and fit the outside portion of one's ear canal.

Maybe easier to have a wireless game camera at the stock pond.

 

edit : for numerous PIC

JAON-22DHCK168 | Product Change Notification | Microchip

...

 

Title

CCB 4910, 4910.001, 4910.002, 4910.003 and 4910.004 Initial Notice: Qualification of A194 lead frame as an additional lead frame material for selected products available in 40L UQFN (5x5x0.5mm), 28L UQFN (4x4x0.55mm), 20L UQFN (4x4x0.5mm), 16L UQFN (4x4x0.5mm), and 16L UQFN (3x3x0.5mm) packages.

 

...

 

Attachments

PCN_JAON-22DHCK168_Qual_Plan.pdf

 

...

 

Estimated Qualification Completion Date:
December 2021

 

...

"Dare to be naïve." - Buckminster Fuller

Last Edited: Fri. Nov 26, 2021 - 01:54 AM
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I remain unconvinced that third party suppliers could not manufacture Lead Frames to the requisite standard.

 

gchapman wrote:
P.P.S.

Cows and embedded systems : a relative few cows died here during Storm Uri (broke through the ice on a stock pond then stuck in the pond's mud so quickly passing due to loss of body temperature)

British cows are more intelligent !

 

Vast quantities of snow can fall in a short space of time.

You need some serious prolonged "cold" to freeze a pond.    Especially when ambient Texas weather is well above 0C.

 

But cows can definitely get stuck in mud.

 

Oh,  British Dairy Cows are pretty wimpy.    They don't like being rained on.    They stand at the field gate waiting to get under cover.

And spend all the winter months indoors.

 

David.

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david.prentice wrote:
I remain unconvinced that third party suppliers could not manufacture Lead Frames to the requisite standard.
... in enough quantity given competition among their customers (backlogs across suppliers)

 

P.S.

david.prentice wrote:
Especially when ambient Texas weather is well above 0C.
typical ... atypical hurts

david.prentice wrote:
And spend all the winter months indoors.
Local dairy cows have a choice; beef cattle don't (the cattle shed isn't as occupied as I thought would be)

Ranchers and ranch hands spill round bale hay over the snow and ice (bedding), leave a complete round bale or so for bulk feed, supplement that with pellets (protein, bits of corn, etc) and mineral licks, water from the stock tank or ideally a water well.

 


Storm Uri :

February 2021: Historic Winter Storm and Arctic Outbreak (USA NOAA, Fort Worth / Dallas)

Worse than the early-Feb'11 polar outbreak.

A hope is this La Nina will blunt the Alberta clippers.

What Is La Niña? | NOAA SciJinks – All About Weather (USA NOAA)

 

"Dare to be naïve." - Buckminster Fuller

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British Beef Suckler herds don't make a fuss about rain.    They spend most if not all of their life outside.

It depends on the breed.  Local Sussex cows are more hardy than European breeds.    On the other hand no one would keep them on a Scottish mountain.

 

I guess that a Texas Ranch is a lot different to the South of England.   Normally you are just hot.  Last year was unexpected.

Other parts of USA and Canada have extremes of cold as well as extremes of hot.

 

David.

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david.prentice wrote:
Last year was unexpected.
Shouldn't (we forget and don't listen to our elders, local record low is Jan'47 at -12F [-24C])

The northern polar vortex is spinning well; next grand solar minimum is predicted for after Solar Cycle 25 (current)

"Dare to be naïve." - Buckminster Fuller