The HB52RF328GB and HB52RD328GB are a 32M x 64 x 1 banks Synchronous Dynamic RAM Micro Dual In-line Memory Module (Micro DIMM), mounted 8 pieces of 256M bits SDRAM (HM522805BTB/BLTB) sealed in TCP package and 1 piece of serial EEPROM (2k bits EEPROM) for Presence Detect (PD). An outline of the products is 144-pin Zig Zag Dual tabs socket type compact and thin package. Therefore, they make high density mounting possible without surface mount technology. They provide common data inputs and outputs.