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Partname:BQ4285S-
Description:Real-Time Clock RTC With NVRAM Control
Manufacturer:Texas Instruments
Datasheet:PDF (1.11M).
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The CMOS bq4285 is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. Other features include three maskable interrupt sources, square wave output, and 114 bytes of general nonvolatile storage.

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