BUY DS1225Y-150 https://www.utsource.net/itm/p/620503.html
64K Nonvolatile SRAM
Description: The DS1225Y-150 is a nonvolatile static RAM (NVSRAM) from Dallas Semiconductor. It is a 28-pin DIP package with a 150ns access time. Features: 150ns access time Low power consumption Nonvolatile memory 28-pin DIP package 32K x 8 bit memory Battery backup Data retention of 10 years High speed write cycle Applications: Automotive Industrial Medical Telecommunications Networking Robotics Military (For reference only)