DS1647P

19-5596; Rev 10/10 www.maxim-ic.com DS1647/DS1647P Nonvolatile Timekeeping RAM FEATURES PIN CONFIGURATIONS  Integrates NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and Lithium Energy Source  Clock Registers Are Accessed Identically to the Static RAM. These Registers are Resident in the Eight Top RAM Locations.  Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power  BCD Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year Compensation Valid Through 2099  Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance  DS1647 Only (DIP Module): Standard JEDEC Byte-Wide 128k x 8 RAM Pinout TOP VIEW A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 32 2 31 3 DS1647 30 4 29 5 28 6 27 7 26 8 25 9 24 10 23 11 22 12 21 13 20 14 19 15 18 16 17 VCC A15 A17 WE A13 A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 32-Pin Encapsulated DIP Package (32 Pin 740)  DS1647P Only (PowerCap Module Board): Surface Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal Replaceable Battery (PowerCap) Power-Fail Output Pin-for-Pin Compatible with Other Densities of DS164XP Timekeeping RAM ORDERING INFORMATION PART TEMP PINRANGE PACKAGE DS1647-120+ 0°C to 32 EDIP +70°C (0.740a) DS1647P-120+ 0°C to 34 +70°C PowerCap* TOP MARK** DS1647+120 DS1647P+120 N.C. A15 A16 PFO VCC WE OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 GND 1 2 3 DS1647P 4 5 6 7 8 9 10 11 12 13 14 15 16 X...