4-MBlT (256K x 16 512K x 8) LOW-POWER BOOT BLOCK F.
28F004BL-B - LOW-POWER BOOT BLOCK FLASH MEMORY
28F004BL-T - LOW-POWER BOOT BLOCK FLASH MEMORY
IS28F004BL - 512K x 8 CMOS
IS28F004BLV - 512K x 8 CMOS