512 Bit (64B X8) Serial Access TIMEKEEPER SRAM The M41T56M6 is a serial real-time clock (RTC) manufactured by STMicroelectronics. Below are the specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** STMicroelectronics
- **Part Number:** M41T56M6
- **Type:** Serial Real-Time Clock (RTC)
- **Interface:** I²C (400 kHz)
- **Supply Voltage:** 1.3V to 4.4V (operating range)
- **Backup Supply Voltage:** 1.3V to 4.4V
- **Timekeeping Current:** 350nA (typical at 3V)
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SO8 (8-pin Small Outline Package)
- **Clock Accuracy:** ±5ppm (±0.432 seconds/day) at 25°C
- **Date Format:** Day, Date, Month, Year (with leap year compensation up to 2100)
- **Alarms:** Two programmable time-of-day alarms
- **Oscillator:** Integrated 32.768 kHz crystal oscillator
- **Battery Backup:** Supports battery or supercapacitor backup
### **Descriptions:**
The M41T56M6 is a low-power serial RTC with an integrated 32.768 kHz oscillator. It provides accurate timekeeping with very low power consumption, making it suitable for battery-backed applications. The device communicates via I²C and includes features such as alarms, programmable square-wave output, and power-fail detection.
### **Features:**
- **Ultra-Low Power Consumption:** 350nA typical timekeeping current at 3V
- **Wide Voltage Range:** Operates from 1.3V to 4.4V
- **I²C Interface:** Supports standard (100 kHz) and fast (400 kHz) modes
- **Battery Backup Support:** Seamless switchover between main and backup power
- **Two Time-of-Day Alarms:** Configurable for interrupt generation
- **Programmable Square-Wave Output:** Frequencies from 1Hz to 32kHz
- **Power-Fail Detection:** Monitors VCC and switches to backup supply
- **Leap Year Compensation:** Valid up to year 2100
- **Industrial Temperature Range:** -40°C to +85°C
This information is based on STMicroelectronics' official datasheet for the M41T56M6.
