R2023K/T is a CMOS real-time clock IC connected to the CPU by two signal lines, SCL, SDA, and configured to perform serial transmission of time and calendar data to the CPU. The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.45µA at 3V).
The Ricoh R2023K/T is a CMOS real-time clock IC designed for connection to a CPU via two signal lines, SCL and SDA. It supports serial transmission of time and calendar data and includes a periodic interrupt circuit with six selectable ranges from 0.5 seconds to 1 month. The device also features two alarm interrupt circuits for preset times and a 32-kHz clock output function.
| Time keeping current (Typ) | 0.45uA at 3V |
|---|---|
| Time keeping current (Max) | 1.00uA |
| Oscillation frequency | 32.768 kHz |
| SCL Clock Frequency | 400 kHz |
| Operating Temperature | -40 to +85 °C |
| Storage Temperature | -55 to +125 °C |
| Package TSSOP10G dimensions | 4.0mm x 2.9mm x 1.0mm |
| Package FFP12 dimensions | 2.0mm x 2.0mm x 1.0mm |
The typical time keeping current is 0.45uA at 3V.
The maximum SCL clock frequency is 400 kHz.
Yes, it supports automatic identification of leap years up to the year 2099.
The available packages are TSSOP10G (R2023T) and FFP12 (R2023K).