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M41T80M6F from STMicroelectronics,ST Microelectronics

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M41T80M6F

Manufacturer: STMicroelectronics, ST

Serial Access RTC with Alarms

Partnumber Manufacturer Quantity Availability
M41T80M6F STMicroelectronics, ST 170150 In Stock

Description and Introduction

Serial Access RTC with Alarms The M41T80M6F 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) from 0°C to +60°C  
- **Package:** SO8 (150mil)  

### **Descriptions:**
- The M41T80M6F is a low-power serial RTC with an integrated 32.768kHz oscillator.  
- It provides timekeeping functions (seconds, minutes, hours, day, date, month, year) with leap-year compensation up to 2099.  
- Features a built-in power-sense circuit for automatic switchover to backup supply (battery or supercapacitor).  
- Includes alarm, watchdog timer, and timestamp functions.  

### **Features:**
- **Ultra-Low Power Consumption:** Ideal for battery-backed applications.  
- **Battery Backup:** Automatic switchover to backup supply.  
- **Programmable Alarm & Interrupt:** Configurable for time/date-based triggers.  
- **Watchdog Timer:** Reset function for system monitoring.  
- **Timestamp Function:** Records power-up/down events.  
- **Oscillator Stability:** High accuracy over temperature variations.  

This device is commonly used in embedded systems, industrial controls, meters, and IoT applications requiring precise timekeeping.

Application Scenarios & Design Considerations

Serial Access RTC with Alarms

Alternative Part Number

  • DS3231MZ+ --: I2C real-time clock with integrated crystal and similar SOIC-8 footprint; highly accurate and widely used as a drop-in functional replacement for serial RTCs.
  • PCF8563T --: Low-power I2C RTC in SO-8 package with comparable register interface and alarm functions; common alternative for ST serial RTCs.
  • RV-3028-C7 --: Ultra-low-power I2C RTC with integrated crystal, similar functionality and small package; suitable when low current consumption is important.
  • RV-8564-C3 --: I2C RTC module with integrated crystal in a compact package, offering similar timekeeping features and low power consumption for replacement use.

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