What does the I suffix call out for ISSI SRAM chip


#1

What does the I call out for SRAM chip from ISSI, example number being
IS61LV25616AL-10TLI


#2

The I calls out an industrial grade temperature

See ISSI SRAM Part numbering guide on the digikey website for 706-1208-ND


#3

Here is the full part number breakdown from ISSI.