DS1643P rams equivalent, nonvolatile timekeeping rams.
* Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source
* Clock Registers are Accessed Identically to the Static RAM..
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 21 20 19 18 28 29 27 26 16 15 14 13 12 11 10 9 8 7 — 6 5 4 17 NAME N.C. A12 A7 A6 A5 A4 A3 A2 A1 A0 A10 A11.
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