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M41T81M6TR from ST,ST Microelectronics

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M41T81M6TR

Manufacturer: ST

Serial Access Real-Time Clock with Alarms

Partnumber Manufacturer Quantity Availability
M41T81M6TR ST 42 In Stock

Description and Introduction

Serial Access Real-Time Clock with Alarms The M41T81M6TR is a serial real-time clock (RTC) manufactured by STMicroelectronics. Below are its key specifications, descriptions, and features:

### **Manufacturer:**  
STMicroelectronics  

### **Specifications:**  
- **Interface:** I²C (400 kHz)  
- **Supply Voltage:** 1.3V to 4.4V (operating range)  
- **Timekeeping Current:** 350nA (typical at 3V)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SO8 (8-pin Small Outline)  

### **Descriptions:**  
- Low-power serial RTC with a built-in 32.768 kHz oscillator.  
- Provides seconds, minutes, hours, day, date, month, and year information with leap-year compensation.  
- Features a programmable alarm and watchdog timer.  
- Includes a power-fail detection circuit and automatic switchover to backup supply.  

### **Features:**  
- **Battery Backup:** Operates from a backup supply when main power fails.  
- **Clock Accuracy:** ±5 ppm (±0.432 seconds/day) at 25°C.  
- **Low Power Consumption:** Optimized for battery-powered applications.  
- **Alarm Function:** Programmable daily or weekly alarm.  
- **Watchdog Timer:** Configurable timeout period.  
- **Tamper Detection:** Optional timestamp feature on supply voltage drop.  

This RTC is commonly used in embedded systems, industrial applications, and consumer electronics requiring accurate timekeeping.

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