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M41T81SMY6F from ST,ST Microelectronics

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M41T81SMY6F

Manufacturer: ST

Serial real-time clock (RTC) with alarm

Partnumber Manufacturer Quantity Availability
M41T81SMY6F ST 2500 In Stock

Description and Introduction

Serial real-time clock (RTC) with alarm The M41T81SMY6F is a serial real-time clock (RTC) manufactured by STMicroelectronics. Below are its key specifications, descriptions, and features based on available data:  

### **Manufacturer:** STMicroelectronics  
### **Part Number:** M41T81SMY6F  

### **Description:**  
The M41T81SMY6F is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator. It provides accurate timekeeping with battery backup support for non-volatile operation.  

### **Key Features:**  
- **Timekeeping Functions:**  
  - Seconds, minutes, hours, day, date, month, year (with leap year compensation up to 2099).  
  - 12-hour or 24-hour format.  
- **Low Power Consumption:**  
  - Ultra-low battery current (typical **400 nA** at 3V).  
- **Serial Interface:**  
  - I²C (400 kHz) communication.  
- **Integrated Oscillator:**  
  - Built-in 32.768 kHz tuning-fork crystal (no external crystal required).  
- **Battery Backup Support:**  
  - Operates from **1.3V to 4.4V** (main supply) and **1.0V to 4.4V** (backup mode).  
- **Alarm Function:**  
  - Programmable alarm with interrupt output.  
- **Watchdog Timer:**  
  - Configurable watchdog timer (1/16th second to 124 seconds).  
- **Temperature Compensation:**  
  - Automatic compensation for crystal frequency drift.  
- **Small Package:**  
  - **SO8N** (150-mil SOIC) package.  

### **Applications:**  
- Industrial systems  
- Consumer electronics  
- Smart meters  
- Medical devices  
- Battery-powered devices  

This information is based on the manufacturer's datasheet and technical documentation. For detailed specifications, refer to STMicroelectronics' official resources.

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