Description
19-5058; Rev 5/10 www.DataSheet4U.com DS1643/DS1643P Nonvolatile Timekeeping RAMs www.maxim-ic.com .
PDIP 1 2 3 4 5 6 7 8 9 10 21 23 24 25 11 12 13 15 16 17 18 19 20 22 26 27 28.
14.
PIN PowerCap 1, 2, 3, 31.
34 30 25 24 23 22.
Features
* Integrated 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 Reside in the Eight Top RAM Locations.
* Totally Nonvolatile with Over 10 Years of Operation in the Absence o
