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I²C BUS Serial Interface RTC with High-precision Oscillation Adjustment - BU9873FVMThe 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.
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| * This product is a STANDARD grade product and not recommend for on-vehicle devices. | ||||
Specifications:
| Time Keeping Voltage(Min.)[V] | 1.45 |
| Time Keeping Current(Typ.)[uA] | 0.4 |
| Time Keeping Current(Max.)[uA] | 1 |
| Supply voltage(Min.)[V] | 1.8 |
| Supply voltage(Max.)[V] | 5.5 |
| Access Frequency 1 [kHz] | 100 |
| Access Frequency 1 [kHz] | 400 |
Features:
- ・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
・32.768 kHz Clock Output (Output from 32KOUT with Control Pin)
・±30 Second Adjustment Function
・Automatic Leap Year Recognition up to the Year 2099
・Built-in Oscillation Stabilizing Capacitors (CG, CD)
・High-Precision Oscillation Adjustment Circuit
Pin Configuration:
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| PART NUMBER | Product Name | Package | Datasheet | Distribution Inventory |
|---|---|---|---|---|
| BU9873F | I²C BUS Serial Interface RTC with High-precision Oscillation Adjustment | SOP8 | Buy Sample | |
| BU9873FJ | I²C BUS Serial Interface RTC with High-precision Oscillation Adjustment | SOP-J8 | Buy Sample | |
| BU9873FVT | I²C BUS Serial Interface RTC with High-precision Oscillation Adjustment | TSSOP-B8 | Buy Sample | |
| BU9873NUX | I²C BUS Serial Interface RTC with High-precision Oscillation Adjustment | VSON008X2030 | Buy Sample |
New Products:
Technical Data
Thermal Resistance
The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.
Part Explanation
For ICs