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The DS12C887 Real Time Clock plus RAM is designed as a direct upgrade replacement for the DS12887in existing IBM compatible personal computers to add hardware year 2000 compliance. A century bytewas added to memory location 50, 32h, as called out by the PC AT specification. A lithium energysource, quartz crystal, and write-protection circuitry are contained within a 24–pin dual in-line package.As such, the DS12C887 is a complete subsystem replacing 16 components in a typical application. Thefunc
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