FLASH NOR HIGH DENSITY & CONSUMER M29DWxxx FAMILY.
M29W640D - FLASH NOR HIGH DENSITY & CONSUMER
M29W640DB - 64 Mbit 8Mb x8 or 4Mb x16 / Boot Block 3V Supply Flash Memory
M29W640DT - 64 Mbit 8Mb x8 or 4Mb x16 / Boot Block 3V Supply Flash Memory