FINAL Am29F040 4 Megabit (524,288 x 8-Bit) CMOS 5.
AM29F040B - 4 Megabit CMOS 5.0 Volt-only Uniform Sector Flash Memory
29F040B - AM29F040B
Am29F040 - 4 Megabit CMOS 5.0 Volt-only Sector Erase Flash Memory