## Overview of R2061S02-E2-F The **R2061S02-E2-F** is a high-precision, Real-Time Clock (RTC) integrated circuit (IC) manufactured by **Nisshinbo Micro Devices** (formerly Ricoh Electronic Devices). This specific part is designed for low power consumption and high reliability in timekeeping applications. --- ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Interface Type** | 2-wire I2C Bus Interface | | **Operating Voltage Range** | 1.6V to 5.5V | | **Current Consumption** | 0.45µA (Typ) at 3V | | **Package Type** | SOP-10 (Small Outline Package) | | **Functionality** | Time (Hr/Min/Sec), Calendar (Yr/Mo/Day/Wk), Alarms | | **Output Signal** | 32.768 kHz / 1,024 Hz / 32 Hz / 1 Hz | --- ### Key Internal Components & Features The R2061 series is known for integrating several critical electronic subsystems into a single package: 1. **Oscillator Circuit**: It is designed to work with an external 32.768 kHz quartz crystal. It includes internal load capacitors to stabilize the frequency. 2. **Clock/Calendar Counters**: Digital logic that tracks seconds, minutes, hours, days, months, years, and day-of-the-week. It automatically accounts for leap years until 2099. 3. **Digital Offset Register**: A unique feature that allows for fine-tuning the clock's accuracy. By adjusting this register via software, users can compensate for the frequency deviation of the crystal. 4. **Alarm & Interrupt Generator**: Can be programmed to trigger an interrupt signal at a specific time or date, or provide periodic pulses (e.g., 1-second ticks). 5. **Voltage Monitoring**: Includes a low-battery detection circuit that flags when the backup power source (like a button cell) falls below a certain threshold. --- ### Pin Configuration Summary | Pin No. | Name | Description | | :---: | :--- | :--- | | 1 | **SCL** | I2C Serial Clock Input | | 2 | **SDA** | I2C Serial Data Input/Output | | 3 | **VCC** | Power Supply | | 4 | **GND** | Ground | | 5 | **INT** | Interrupt Output (Active Low) | | 6 | **X1/X2** | Crystal Oscillator Connection Points | --- ### Typical Applications * **IoT Devices**: Due to the ultra-low power consumption. * **Smart Meters**: For long-term accurate timekeeping with battery backup. * **Industrial Controllers**: Maintaining timestamps for logs and system events. * **Consumer Electronics**: Cameras, printers, and home appliances.