ROHM BU9873NUX-TTR, Real Time Clock (RTC) Serial-I2C, 8-Pin VSON008X2030

  • RS Stock No. 178-0558
  • Mfr. Part No. BU9873NUX-TTR
  • Manufacturer ROHM
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): JP
Product Details

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.

Connected to the CPU via I²C Interface
Time (Hour・Minute・Second, Selectable 12-Hour and 24-Hour Mode Setting)
Calendar (Year・Month・Day・Week)
Periodic Interrupt Function (Output from INTRB, Ranging from 1 Second to 1 Month)
Alarm Interrupt Function (Day-of-Week・Hour・Minute in Setting Format, Output from INTRB)
Oscillation Halt Sensing Function
Automatic Leap Year Recognition up to the Year 2099
Built-in Oscillation Stabilizing Capacitors (CG, CD)
High-Precision Oscillation Adjustment Circuit

Attribute Value
Functions Real Time Clock
Time Format HH:MM:SS
Bus Type Serial-I2C
Mounting Type Surface Mount
Package Type VSON008X2030
Pin Count 8
Dimensions 2 x 3 x 0.58mm
Length 2mm
Width 3mm
Height 0.85mm
Maximum Operating Supply Voltage 5.5 V
Minimum Operating Supply Voltage 1.8 V
Maximum Operating Temperature +85 °C
Minimum Operating Temperature -40 °C
180 In stock for delivery within 3 working days
Price Each (In a Pack of 10)
SGD 1.215
(exc. GST)
SGD 1.30
(inc. GST)
Per unit
Per Pack*
10 - 40
50 - 90
100 - 490
500 - 1990
2000 +
*price indicative
Packaging Options:
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