DS1646P - Maxim Integrated

DS1646P Nonvolatile Timekeeping RAM

PIN PDIP PowerCap NAME 1, 30 1, 33, 34 N.C. 23 A16 3 32 A14 4 30 A12 5 25 A7 6 24 A6 7 23 A5 8 22 A4 9 21 A3 10 20 A2 11 19 A1 12 18 A0 25 29 A11 26 27 A9 27 26 A8 28 31 A13 13 16 DQ0 14 15 DQ1 15 14 DQ2 17 13 DQ3 18 12 DQ4 19 11 DQ5 20 10 DQ6 21 9 DQ7 16 17 GND 22 8 CE 23 28 A10 24 7 OE 29 6 WE 31.

Features

 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 Up to 2100
 Power-Fail Write Protection Allows for ±10% VCC Power Supply Tolerance
 DS1646 only (DIP Module) PIN CONFIGURATIONS N.C. A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6.