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BUY DS1746-70+ https://www.utsource.net/itm/p/4393209.html
IC RTC CLK/CALENDAR PAR 32-EDIP
Description: The DS1746-70+ is a nonvolatile, low-power CMOS static RAM with a built-in real-time clock/calendar. Features: Low-power CMOS static RAM Real-time clock/calendar Battery-backed RAM 8K x 8 bits of RAM Multiple power-saving modes Programmable clock/calendar 2K x 8 bits of battery-backed RAM 8-bit I/O port 2K x 8 bits of user RAM 8-bit timer/counter 4K x 8 bits of user RAM Programmable watchdog timer 8-bit A/D converter Multiple interrupt sources 8-bit D/A converter On-chip oscillator Programmable clock output On-chip power-on reset On-chip power-fail reset Available in DIP and SOIC packages Application: The DS1746-70+ is ideal for applications that require a real-time clock/calendar, battery-backed RAM, and low-power operation. It is suitable for use in industrial, consumer, and automotive applications. (For reference only)