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BUY DS1230YP-70 https://www.utsource.net/itm/p/5655189.html
256k Nonvolatile SRAM
Description: The DS1230YP-70 is a nonvolatile, 32K x 8-bit CMOS static RAM with a built-in power-failure detection circuit. Features: 32K x 8-bit nonvolatile static RAM Low power consumption Built-in power-fail detection circuit Low standby current Single +5V power supply Access times of 70ns TTL compatible inputs and outputs Automatic write-protect on power-fail Automatic write-protect on VCC loss Automatic write-protect on chip select Automatic write-protect on write enable Automatic write-protect on data input Automatic write-protect on data output Automatic write-protect on address input Applications: Automotive Industrial control Robotics Medical Security systems Military Telecommunications Networking (For reference only)