RAMTRON FM1808 chip. Used to replace the original SRAM chip in the Saturn or N64 Expansion Pak, so you don't lose your saves once the battery dies.
Replace the original chip, lift pin 22 and connect it to ground.
Direct replacement for the original chip.
Mega/Sega CD Install:
Replace the original chip, lift pins 1 and 26 and connect them to ground.