DS1386 - RAMified Watchdog Timekeeper

INTA INTB (INTB) A0-A14 DQ0-DQ7 CE OE WE VCC GND SQW NC X1, X2 VBAT - Interrupt Output A (open drain) - Interrupt Output B (open drain) - Address Inputs - Data Input/Output - Chip Enable - Output Enable - Write Enable - +5V - Ground - Square Wave Output - No Connection - Crystal Connection - Batte

• 8 or 32 kbytes of user NV RAM Integrated NV SRAM, real time clock, crystal, power-fail control circuit and lithium energy source Totally nonvolatile with over 10 years of operation in the absence of power Watchdog timer restarts an out-of-control processor Alarm function schedules real-time related activities such as system wakeup Programmable interrupts and square wave output All registers are individually addressable via the address and data bus.