BUY LH21256-12 https://www.utsource.net/itm/p/1207940.html
Dynamic RAM, Page Mode, 256K x 1, 16 Pin, Plastic, DIP
Description: The LH21256-12 is a 16-pin DIP (dual in-line package) CMOS (complementary metal-oxide semiconductor) integrated circuit (IC) manufactured by Sharp Microelectronics of the Americas. Features: Low power consumption Low standby current High speed operation High noise immunity High output drive capability TTL compatible inputs Low voltage operation Wide operating temperature range Application: The LH21256-12 is a general-purpose IC designed for use in a variety of applications, including automotive, industrial, and consumer electronics. It can be used as a timer, counter, or shift register, and can be used to control motors, relays, and other devices. (For reference only)