Description
The MCP79400-I/SN is a versatile, low-power Real-Time Clock (RTC) and calendar IC engineered for high precision and flexibility. It utilizes digital timing compensation to ensure an accurate clock reference when paired with a standard 32.768kHz quartz crystal. Beyond basic timekeeping, the device features a power-sense circuit that facilitates automatic switching to a backup battery supply upon main power loss, ensuring continuous operation for mission-critical applications.
Designed for easy system integration via the I²C bus, the MCP79400 offers comprehensive time management, including automatic leap-year and month-length adjustments. It provides two programmable alarms and a battery-backed SRAM for volatile data storage. Uniquely, it also includes 64 bits of protected, user-accessible EEPROM, which is ideal for storing critical configuration data, such as a factory-programmed unique ID or a MAC address, making it a robust choice for networked and embedded devices.
Key Features
- Accurate Timekeeping: Digital timing compensation ensures precise clock/calendar tracking.
- Battery Backup Management: Integrated power-sense circuit allows for seamless, automatic transition to backup power.
- Enhanced Memory: Features both battery-backed SRAM and 64 bits of protected, non-volatile EEPROM for ID/MAC storage.
- Flexible Alarms: Two programmable alarms settable down to the second, minute, hour, day, date, or month.
- Standard Interface: Reliable I²C bus communication for simple connectivity with microcontrollers.
- Power Efficiency: Optimized for low-power operation with a supply voltage range of 1.8V to 5.5V.
Applications
- Networked Devices: Perfect for IoT applications requiring unique identifiers or MAC addresses stored in EEPROM.
- Embedded Systems: Provides a dependable time reference with built-in backup capabilities.
- Industrial Automation: Reliable time-stamping and scheduling in robust, field-deployed hardware.
- Portable Electronics: Low-power consumption makes it suitable for battery-operated handheld devices.
Package Includes
- 1 x MCP79400-I/SN Alarm RTC IC (SOIC-8)
Technical Specifications
| Parameter | Specification |
|---|---|
| Device | MCP79400-I/SN |
| Functionality | Alarm RTC |
| Interface | I²C |
| Supply Voltage | 1.8V – 5.5V |
| Package Type | SOIC-8 |
| Operating Temp | -40°C to +85°C |
| Shipping Weight | 0.01 kg |
| Shipping Dimensions | 4 × 4 × 2 cm |
Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.
