Function : 4 Mbit ( 512Kb x8 or 256Kb x16 ) / Boot Block Single Supply Flash Memory
Maker : STMicroelectronics
The M29F400B is a 4 Mbit (512Kb x8 or 256Kb x16) non-volatile memory that can be read, erased and reprogrammed. These operations can be performed using a single 5V supply. On power-up the memory defaults to its Read mode where it can be read in the same way as a ROM or EPROM.
The M29F400B is fully backward compatible with the M29F400.
Datasheet PDF Download :
Others datasheet of same file : M29F400,M29F400BB,M29F400BT