The R1LV1616R Series is a family of low voltage 16-Mbit static RAMs organized as 1048576-words by 16-bit, fabricated by Renesas's high-performance 0.15um CMOS and TFT technologies. The R1LV1616R Series is suitable for memory applications where a simple interfacing , battery operating and battery backup are the important design objectives. The R1LV1616RBA Series is packaged in a 48balls Wafer Level Chip Scale Package[WL-CSP / 5.62mm x 5.84mm with the ball-pitch of 0.55mm and the height of 0.79mm]. It gives the best solution for a compaction of mounting area as well as flexibility of wiring pattern of printed circuit boards.