DS1646 Datasheet (Maxim Integrated) - Nonvolatile Timekeeping RAM

DS1646, 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 D

DS1646 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 Abse