are these STM32 ICs genuine or clone ?
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‎2018-06-04 06:17 AM
hello dear forum,
I used to buy STM32 F103 mcus from my countries biggest supplier
this IC below is 5,- USD there
now becouse of competition I need more cheap products and I imported
this below IC for 2,35 USD from China
I soldered this on to my board and I saw that it is working
( I downloaded code and tried some peripherals )
I could not check all the functions yet
my question ;
this big price difference makes me suspicious
is this second picture genuine or clone ?
did you experience this second ICs ?
can I trust this second ICs ?
whats your opinion ?
thank you
#clone #stm32f103 #genuine- Labels:
-
STM32F1 Series
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‎2018-06-07 01:48 PM
You mean Chinese have copied a ST mcu ?
is that, this easy ?
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‎2018-06-07 01:55 PM
'
is that, this easy ?'
to some, yes.
this 'ST MCU' is really a 3rd party IP (ARM core) + ST peripherals (some of which could be licensed from other people). So it is not that difficult to license the same core from the same 3rd party, and slap on your own peripherals to produce a MCU that's functionally (materially) identical to ST's, bugs aside.
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‎2018-06-07 02:09 PM
I only heard about Giga Devices but these chips were clearly marked by GD prefix:
https://olimex.wordpress.com/2015/11/09/chinese-clones-attack-stm32-microcontrollers/
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‎2018-06-07 11:56 PM
It looks like some counterfight chip. Try to see if Your programmer Tool can read the type and serial from a 'good' chip and from these cheap ones, I guess, You cannot read from the last one.
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‎2018-06-08 12:03 AM
I have a hard time believing THIS chip to be counterfeit.
From a cost-benefit point of view, this sounds ridiculous.
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‎2018-06-08 06:53 AM
'The ICs I imported were unused and they were never soldered before'
Well, that's what I thought of the cheap chips I bought via ebay as well...
Seeing that a stm32f103c8t6 at Mouser is around 4 euro (plus shipping)
and one bought in China can be had for about 1 usd (less than 1 euro, free shipping) I couldn't resist it.
The chips look new, are clean, no solder, not scratched or anything. But when I wanted to use them they all were 'readout-locked'. It is hard to imagine ST producing pre-locked chips.
As they were sold as new, I complained and got refunded.
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‎2018-06-11 01:29 PM
Dear Sir;
You may submit an online support ticket, and we can try and help you. We will need photos of the label on the reel, if any, or other shipping labels. Also, please let us know who the vendors are when submitting the support ticket.
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‎2018-06-12 09:47 AM
hello Mr Bryan,
what is a support ticket ?
thank you
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‎2018-06-12 11:56 AM
On the ST Website:
http://www.st.com/content/st_com/en/support/support-home.html
Support Request - via web form
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‎2018-09-20 07:25 AM
hello dear ST,
my support request about this issue
is not answered since long time
https://my.st.com/ols#/ols/editrequest/00062723
thank you