BUY M27C4001-15F6 https://www.utsource.net/itm/p/1330747.html
4 MBIT 256KB X16 UV EPROM AND OTP ROM
Description: The M27C4001 is a 4 Mbit (512 K x 8-bit) CMOS EPROM. Features: Low power consumption High speed access time: 45, 55, 70, 85, 120, 150, 200 and 250 ns Single 5V ± 10% power supply Programmable protection against inadvertent write TTL compatible inputs and outputs Output enable and chip enable controls Endurance: 100,000 cycles Data retention: 100 years Applications: The M27C4001 is suitable for a wide range of applications, including automotive, industrial and consumer electronics. It is suitable for applications such as program storage, data storage, code storage, parameter storage, calibration data storage, and other applications requiring non-volatile memory. (For reference only)