Key facts
- Brand
- Ricoh
- Model
- 2 Series
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-10
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Ricoh R2062 Series Real-Time Clock IC Datasheet
The Ricoh R2062 series consists of CMOS real-time clock ICs designed to connect to a CPU via three signal lines: CE, SCLK, and SIO. These devices perform serial transmission of time and calendar data and include a battery backup switchover circuit and a voltage detector. The series supports periodic and alarm interrupt circuits, with the oscillation circuit driven under constant voltage to minimize frequency fluctuation and power consumption.
Read onlineRicoh 2 Series specifications
| Timekeeping supply voltage (Typ.) | 0.75V |
|---|---|
| Timekeeping supply voltage (Max.) | 1.00V |
| Time keeping current (Typ.) | 0.4uA |
| Maximum clock frequency | 1MHz |
| Operating temperature range | -40 to +85 °C |
| Storage temperature range | -55 to +125 °C |
| Package types | FFP12, SSOP 16 |
All Ricoh 2 Series documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the function of the battery backup switchover circuit?
It is an automatic switchover circuit between a main power supply and a backup battery of a secondary battery.
How many signal lines are required to connect the IC to the CPU?
Three signal lines are required: CE, SCLK, and SIO.
What should be used instead of R3117xxx1A/C for new designs?
Use the R3117xxx3A/C and R3117Qxx4A/C Series to avoid noise issues when the SENSE pin voltage rises gradually.
From: Ricoh R3117xxx1/2 Series Low Voltage Detector Datasheet
What is the tolerance of the detector threshold?
The tolerance is 15mV when -Voer is 1.5V or less, and 1.0% when -Voer is greater than 1.5V.
From: Ricoh R3117xxx1/2 Series Low Voltage Detector Datasheet