DS1386P

DS1386/DS1386P RAMified Watchdog Timekeeper www.maxim-ic.com FEATURES § § § § § § § § 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 Interrupt signals are active in power-down mode INTA INTB NC A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN ASSIGNMENT 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VCC SQW VCC WE NC A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 INTA INTB A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VCC SQW VCC WE A13 A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 DS1386 8k x 8 32-Pin Encapsulated Package DS1386 32k x 8 32-Pin Encapsulated Package INTB (INTB) NC NC PFO VCC WE OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 X1 GND VBAT X2 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 INTA SQW NC NC A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 INTB (INTB) NC NC PFO VCC WE OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 X1 GND VBAT X2 34 33 32 31 30 29 28 27 26 ...