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BUY AT49F040-90JC https://www.utsource.net/itm/p/1329839.html
4-Megabit 512K x 8 5-volt Only CMOS Flash Memory
Description: The AT49F040-90JC is a 4-megabit (512K x 8-bit) CMOS Flash memory device manufactured by Atmel Corporation. Features: Low voltage read and program operations (2.7V to 3.6V) Fast read access time (90 ns) Low power consumption Programmable security bit Endurance: 100,000 program/erase cycles Data retention: 20 years JEDEC standard 32-pin PLCC package Applications: The AT49F040-90JC is suitable for a wide range of applications including: Automotive Industrial Telecommunications Consumer electronics Networking Medical (For reference only)