Help needed to identify manufacture

[snehadakhare01]

Dear ST Community,

I'm hoping to get some help identifying the manufacturer, year, and month of manufacturing for an STM32f103c8t6 microcontroller I have. The part number on the chip is 991KA 93 MYS A03.

I've searched the code online and in the datasheet, but I haven't been able to find any information about the manufacturing date. 

Could you please advise on how to identify this information from the code or if there's another method to determine the manufacture date and year?

[Tesla DeLorean]

803

2018 Week 3

Looks a bit fake, does it work or have issues

[AScha.3 · Accepted solution]

+

MYS -> Malaysia 

ST -> STM

(if not relabeled )

[Andrew Neil]

---

@snehadakhare01 wrote:

I'm hoping to get some help identifying the manufacturer,

---

Only ST manufacture genuine STM32s.

If it's not genuine, then the fakers aren't going to publicise who they are!

[snehadakhare01]

Are there any known markings or date codes that indicate a fake STM32 microcontroller?

[Andrew Neil]

The whole point of a fake is that it's intended to look like the real thing - there won't be anything that specifically says, "I'm a fake"!

There may be clues in the quality and/or style of the marking.

There's a lot of past posts about this - try a search.