HM6216255H Series 4M high Speed SRAM (256-kword ×.
HM6216255H - 4M high Speed SRAM (256-kword x 16-bit)
HM6216255HI - 4M high Speed SRAM (256-kword x 16-bit)
HM6216255HC - 4M High Speed SRAM (256-kword x 16-bit)
