BUY AT29C040A-90TU https://www.utsource.net/itm/p/4231990.html
4-megabit (512K x 8) 5-volt Only 256-byte Sector Flash Memory
The AT29C040A-90TU is a 4 Mbit (512 K x 8) CMOS electrically erasable programmable read-only memory (EEPROM) manufactured by Atmel Corporation. It is available in a 32-pin TSSOP package. The device features a low-voltage, high-performance CMOS technology, a fast programming time, and a wide operating voltage range. It is also capable of operating over a wide temperature range from -40°C to +85°C. The AT29C040A-90TU is ideal for applications such as data storage, program code storage, and non-volatile memory. It is also suitable for applications such as automotive, consumer, industrial, and medical. (For reference only)