DS1500 数据手册 Datasheet - Maxim Integrated

The DS1500 is a full-function, year 2000-compliant, real-time clock/calendar (RTC) with an alarm, watchdog timer, power-on reset, battery monitors, 256Bytes of on-board nonvolatile (NV) SRAM, NV control for backing up an external SRAM, and a 32