A29L400 Series 512K X 8 Bit / 256K X 16 Bit CMOS 3.
A29L400C - Boot Sector Flash Memory
A29L400 - 512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only/ Boot Sector Flash Memory
A29L400A - 512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only
A29L400B - Boot Sector Flash Memory