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BL5372 - Low-power real-time clock chip

Description

The BL5372 is a CMOS type real-time clock, which is connected to the CPU via two wires and capable of serial transmission of clock to the CPU.

Features

  • Lowest supply current: 400nA TYP. @ 5V.
  • Connected to the CPU via only 2-wires (MAX. 100KHz).
  • A clock counter (counting hours, minutes, and seconds) and a calendar counter (counting leap years, years, months, days, and days of the week) in BCD codes.
  • Two systems output providing interrupt to the CPU output (period of one month to one second, interrupt halt function).
  • Two systems output of alarm functions.
  • Oscillation halt sensing to judge internal data validity.

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Datasheet Details

Part number BL5372
Manufacturer SHANGHAI BELLING
File Size 503.66 KB
Description Low-power real-time clock chip
Datasheet download datasheet BL5372 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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SHANGHAI BELLING BL5372 Low Power Real-Time Clock (RTC) GENERAL DESCRIPTION The BL5372 is a CMOS type real-time clock, which is connected to the CPU via two wires and capable of serial transmission of clock to the CPU. The BL5372 can generate various periodic interrupt clock pulses lasting for long period (one month), and alarm interrupt can be made by two incorporated systems. Since an oscillation circuit is driven at a constant voltage, it undergoes fluctuations of few voltage and consequently offers low current consumption (TYP. 400nA @ 5V) It also provides an oscillator halt sensing function applicable for data validation at power-on and other occasions.
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