What does the I suffix call out for ISSI SRAM chip

Semiconductor Integrated Circuits (ICs)
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1

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

ISSIのSRAMチップのサフィックス「I」は何の意味ですか？
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.

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