DS1486P Datasheet | Dallas Semiconductor

FEATURES 128 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 active in power-down mode - - PIN ASSIGNMENT INTB (INTB) A16 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 A15 INTA/SQW WE A13 A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 ORDERING INFORMATION DS1486 XXX (32- pin DIP module) - 150 150 ns access - 120 120 ns access 34-pin Power Cap Module Board - 150 150 ns access - 120 120 ns access DS1486 128k x 8 32-Pin Encapsulated Package - DS1486P - DS9034PCX Power Cap Required (must be ordered separately) PIN DESCRIPTION - Interrupt Output A (open drain) INTB (INTB) - Interrupt Output B (open drain) A0- A16 - Address Inputs DQ0- DQ7 - Data Input/Output CE - Chip Enable OE - Output Enable WE - Write Enable VCC - +5 Volts GND - Ground SQW - Square Wave Output NC - No Connection X1, X2 - Crystal Connection VBAT - Battery Connection INTB INTB (INTB) A15 A16 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...