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RICOH Electronic Devices Co., LTD.
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Rohm Semiconductor
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STMicroelectronics
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I²C BUS Serial Interface RTC with High-Precision Oscillation Adjustment

Rohm Semiconductor

The BU9873 is a CMOS real-time clock, which has a built-in interrupt generation function. This product is connected to the CPU via I²C interface, and configured to perform serial transmission of time and calendar data to the CPU. A high-precision oscillation adjustment circuit is also integrated, which is capable of adjusting time counts with digital method, and correcting deviations in the oscillation frequency of the crystal oscillator.

Specifications
  • Current - Timekeeping (Max):1µA ~ 1.35µA @ 3V ~ 5.5V
  • Date Format:YY-MM-DD-dd
  • Features:Alarm, Leap Year
  • Interface:I²C, 2-Wire Serial
  • Mounting Type:Surface Mount
  • Operating Temperature:-40°C ~ 85°C
  • Time Format:HH:MM:SS (12/24 hr)
  • Type:Clock/Calendar
  • Voltage - Supply:1.8V ~ 5.5V
Parts

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BU9873FVM-GTTRBU9873FVM-GTTRIC RTC CLK/CALENDAR I2C 8MSOP Clock/CalendarAlarm, Leap Year-HH:MM:SS (12/24 hr)8-VSSOP, 8-MSOP (0.110", 2.80mm Width)RoHS
BU9873NUX-TTRBU9873NUX-TTRIC RTC CLK/CALENDAR I2C 8VSON Clock/CalendarAlarm, Leap Year-HH:MM:SS (12/24 hr)8-UFDFN Exposed PadRoHS
BU9873FJ-GTE2BU9873FJ-GTE2IC RTC CLK/CALENDAR I2C SOP8J Clock/CalendarAlarm, Leap Year-HH:MM:SS (12/24 hr)8-SOIC (0.154", 3.90mm Width)RoHS
BU9873FVT-GE2BU9873FVT-GE2IC RTC CLK/CALENDAR I2C 8TSSOP Clock/CalendarAlarm, Leap Year-HH:MM:SS (12/24 hr)8-TSSOP (0.173", 4.40mm Width)RoHS
BU9873F-GTE2BU9873F-GTE2IC RTC CLK/CALENDAR I2C 8SOP Clock/CalendarAlarm, Leap Year-HH:MM:SS (12/24 hr)8-SOIC (0.173", 4.40mm Width)RoHS

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