512 Bit (64B X8) Serial Access TIMEKEEPER SRAM The M41T56M6E is a serial real-time clock (RTC) manufactured by STMicroelectronics. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Supply Voltage:** 2.0V to 5.5V
- **Low Power Consumption:**
- 400nA in battery backup mode (Typical)
- **Clock Accuracy:** ±2ppm from 0°C to +40°C
- **Operating Temperature Range:** -40°C to +85°C
- **Interface:** I²C (400kHz)
- **Timekeeping Current:** 25µA (Typical at 3V)
- **Package:** SO8 (150mil)
### **Descriptions:**
- The M41T56M6E is a low-power serial RTC with a built-in 32.768kHz oscillator.
- It provides timekeeping functions, including seconds, minutes, hours, day, date, month, and year (with leap year compensation up to 2099).
- Includes a programmable alarm and timer functions.
- Features a power-fail detection circuit and automatic switch to battery backup.
### **Features:**
- **Battery Backup Operation:** Maintains timekeeping during power loss.
- **Clock/Calendar:** Tracks time in 12-hour or 24-hour format.
- **Alarm Function:** Programmable with interrupt capability.
- **Timer Function:** Countdown timer with interrupt.
- **Power Management:** Automatic power-fail detection and switchover.
- **Tamper Detection:** Optional timestamp on supply voltage drop.
- **Industrial Temperature Range:** Suitable for harsh environments.
This device is commonly used in applications requiring precise timekeeping, such as industrial systems, meters, and embedded systems.
