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BUY DS1248Y-120 https://www.utsource.net/itm/p/1568616.html
1024k NV SRAM with Phantom Clock
Description: The DS1248Y-120 is a 32-pin nonvolatile static RAM (NVRAM) from Dallas Semiconductor. Features: Low power CMOS technology Nonvolatile memory Fast access time Low standby current 32-pin DIP package Single +5V supply Automatic power-down Automatic write protection Data retention of 10 years Application: The DS1248Y-120 is ideal for applications that require nonvolatile memory, such as data logging, system configuration, and instrumentation. It is also suitable for battery-backed RAM applications. (For reference only)