In the simple circuit the two inputs X1 and X2 are connected to a 32.768 kHz crystal oscillator as the source for the chip. The DS1307 include several components such as power circuits, oscillator circuits, logic controller and I2C interface circuit and the address pointer register (or RAM). The first seven registers contain information about the time of the clock including: seconds, minutes, hours, secondary, date, month and year. The first eight registers are used for the clock register the remaining 56 vacant can be used as RAM contains temporary variable if desired. The memory contains all 64 DS1307 8-bit registers are addressed from 0 to 63 (from 00H to 3FH the hexadecimal system). Using the DS1307 is primarily written to and read the registers of this chip. 56-byte non-volatile RAM for data storage.Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100.Underwriters Laboratory (UL) recognized.Consumes less than 500nA in battery backup mode with oscillator running.Automatic power-fail detect and switch circuitry.If you can not find the product, please click here or contact our sales representatives.ĪBLIC Inc. The world’s smallest class real-time clock enables high-density mounting compared to conventional products.Ī product having different device code from S-35390AĪlarm settable to day/month/year, 24-bit counter Users are able to ascertain the elapsed time up to about 30 years. The 24-bit binary up-countercounts up every 60 seconds after power-on. Counts up to about 30 years using 24-bit binary up-counter!. Expanded alarm interrupt function, long-period setting!ĪBLIC’s real-time clock not only has the standard day-of-the-week, hour and minute alarm interrupt functions it also has alarm functions for the year, month and day.This output makes a quartz crystal unnecessary, reducing the number of parts. Constant output of 32kHz (clock pulse of 32.768kHz output to MCU)Ī 32.768kHz clock is output to the MCU or other devices from an oscillator built into the real-time clock.Various solutions such as constant output of 32kHz By combining the real-time clock with a temperature sensor IC, the value of clock correction can be set according to the temperature change, enabling accurate correction if the clock becomes fast or slow.ģ. The frequency deviation of a quartz crystal can be corrected over a wide range with high accuracy at a minimum resolution of 1ppm. High-accuracy clock correction, minimum resolution of 1ppm Users are able to use smaller batteries, promoting high-density mounting.Ģ. When using a rechargeable lithium-ion battery (3.4mAh) for backup, long-time driving of up to 13,000 hours is possible. Various solutions such as constant output of 32kHzĪBLIC’s real-time clock achieves longer battery life by ultra-low current consumption of 0.25♚.High-accuracy clock correction, minimum resolution of 1ppm.Contributing to Society through Our Products and Services.Automotive Magnetic Sensor ICs (Hall Effect ICs).
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