M29W400BT M29W400BB 4 Mbit (512Kb x8 or 256Kb x16,.
ST Microelectronics
M29W400BB - 4 Mbit 512Kb x8 or 256Kb x16 / Boot Block Low Voltage Single Supply Flash Memory
M29W400BT M29W400BB 4 Mbit (512Kb x8 or 256Kb x16, Boot Block) Low Voltage Single Supply Flash Memory s SINGLE 2.7 to 3.6V SUPPLY VOLTAGE for PROGRAM.