Hi speranskyanton,
Yes, as FVM mentioned:
The date code on the top marking of the Altera EP1K50 chip follows the standard YYWW format:
- The first two digits represent the year of manufacture (17 = 2017).
- The last two digits represent the work week within that year (21 = week 21).
So, a date code of 1721 means the device was manufactured in week 21 of 2017.
I tried to find official documentation specific to FLEX 10K devices, but could not locate a direct reference. The closest available documentation is the Product Marking Information for MAX® II, MAX® V Devices (https://cdrdv2-public.intel.com/732570/product-marking-information-max-ii-and-max-v.pdf), which uses the same YYWW format for date codes. Altera has generally applied this format consistently across their product families.
Regards,
Fakhrul