Hi Frank,
Please be noted that the 1SM21CHU2F53E2VG is Stratix 10 device ordering part number. You can find the active Stratix 10 OPNs from the following link:
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/pcn/pcn1817-opn-list.xlsx
Thank you
Regards,
Chia Ling