55 ns access time, 5V parallel SRAM for legacy bus timing
The R1LP0108ESA-5SI#B0 is a 1 Mbit parallel SRAM organized 128K x 8, with a 55 ns access time that sets the read-cycle ceiling for the memory bus. The 55 ns write cycle time (word, page) matches the read access, so the bus timing budget is symmetric — no need to stretch the write pulse beyond the read window. This matters when the memory controller runs at a fixed cycle time and the SRAM sits on a shared address/data bus with other peripherals.
Industrial temp range and 32-sTSOP footprint
The 32-sTSOP package (11.80 mm width, 0.465" body) is a fine-pitch surface-mount footprint — the 0.50 mm lead pitch demands a controlled solder profile and a stencil aperture sized for the lead width, not the pad. Bulk packaging means the parts ship loose in tubes or trays, not on tape-and-reel. For a kitting line feeding a pick-and-place, this adds a manual tube-handling step — plan for a tube feeder or a tray shaker, not a reel pocket.