May 2007 HYB18T512400B[C/F] HYB18T512800B[C/F] HY.
HYB18T512400B - 512-Mbit Double-Data-Rate-Two SDRAM
HYB18T512400BC - 512-Mbit Double-Data-Rate-Two SDRAM
HYB18T512400BF - 512-Mbit Double-Data-Rate-Two SDRAM