512 Bit (64 bit X8) Serial RTC (SPI) SRAM The M41T94MH6 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
- **Operating Temperature Range:** -40°C to +85°C
- **Timekeeping Current:** 400nA (typical) at 3V
- **Interface:** I²C (400kHz)
- **Clock Accuracy:** ±5ppm (±0.432 seconds/day) at 25°C
- **Package:** SOIC-8
### **Descriptions:**
- The M41T94MH6 is a low-power serial RTC with a built-in 32.768kHz oscillator.
- It provides timekeeping functions (seconds, minutes, hours, day, date, month, year) with leap-year compensation up to 2099.
- It includes an automatic backup switch to a secondary power supply (battery or supercapacitor).
- The device has programmable alarms and watchdog timer functionality.
### **Features:**
- **Low Power Consumption:** Ultra-low battery current for extended operation.
- **I²C Interface:** Supports standard (100kHz) and fast (400kHz) modes.
- **Battery Backup:** Automatic switchover to backup supply.
- **Alarm Function:** Programmable alarm with interrupt output.
- **Watchdog Timer:** Configurable timeout period.
- **Oscillator Stability:** High accuracy (±5ppm) for reliable timekeeping.
- **Small Form Factor:** SOIC-8 package for space-constrained applications.
This device is commonly used in embedded systems, industrial controls, and consumer electronics requiring precise timekeeping.
