SD3031 REAL-TIME CLOCK IC
●The SD3031 is a CMOS type real-time clock with a built-in crystal and an integrated temperature-compensated crystal oscillator(TCXO),which is connected to the CPU via 2-wires and capable of serial transmission of clock and calendar data to the CPU.
●The SD3031 has dual power supply system.When the primary power supply goes down to an assigned value or resumes from low power,the system can switch between the primary power supply and battery automatically.
●The SD3031 can generates various periodic interrupt clock pulses lasting for long period,and three alarm interrupts can be made by year,month,date,days of the week,hours,and minutes.,seconds. It also provides a selectable 4096Hz~1/16Hz clock output for an external MCU.The product incorporates a time trimming circuit that adjusts the clock with higher precision by adjusting any errors in crystal oscillator frequencies.A 70-bytes general SRAM is implemented in the SD3031.
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Datasheet |
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Please see the document for details |
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SOP |
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English Chinese Chinese and English Japanese |
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2021/12/16 |
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632 KB |
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