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M41T00SM6E from ST,ST Microelectronics

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M41T00SM6E

Manufacturer: ST, STM

Serial Access Real-Time Clock

Partnumber Manufacturer Quantity Availability
M41T00SM6E ST, STM 9045 In Stock

Description and Introduction

Serial Access Real-Time Clock The M41T00SM6E is a serial real-time clock (RTC) manufactured by STMicroelectronics (STM). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Interface:** I²C (400 kHz)
- **Operating Voltage:** 1.3V to 5.5V
- **Timekeeping Current:** 400 nA (typical at 3V)
- **Clock Accuracy:** ±5 ppm (±0.432 seconds/day) at 25°C
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SO8 (150 mil)
- **RTC Memory:** 56 bytes of battery-backed SRAM
- **Alarms:** Two programmable alarms
- **Clock Frequency:** 32.768 kHz

### **Descriptions:**
- The M41T00SM6E is a low-power serial RTC with a built-in 32.768 kHz oscillator.
- It provides accurate timekeeping with very low power consumption, making it suitable for battery-backed applications.
- The device includes a power-fail detector and automatic switchover to backup supply.
- It supports I²C communication for easy integration with microcontrollers.

### **Features:**
- **Low Power Consumption:** Ultra-low battery current for extended backup operation.
- **Wide Voltage Range:** Operates from 1.3V to 5.5V.
- **Battery Backup:** Maintains timekeeping and SRAM data during power loss.
- **Two Time-of-Day Alarms:** Configurable alarms with interrupt output.
- **Power-Fail Detection:** Monitors VCC and switches to backup supply.
- **56 Bytes of SRAM:** Battery-backed general-purpose memory.
- **Industrial Temperature Range:** Reliable operation from -40°C to +85°C.
- **SO8 Package:** Compact and widely compatible footprint.

This information is based on the manufacturer's datasheet for the M41T00SM6E.

Application Scenarios & Design Considerations

Serial Access Real-Time Clock

Alternative Part Number

  • DS1307Z+ --: I2C real-time clock in an 8-pin SOIC package with similar function and register-level compatibility, widely available and a common drop-in substitute for the M41T00.
  • PCF8563T --: Low-power I2C RTC in an 8-pin SO package with comparable supply range and timekeeping features, suitable as a functional replacement.
  • RX8025T --: I2C serial RTC with built-in crystal in a similar small package, offering equivalent timekeeping functionality for designs needing an alternative RTC.
  • RV-3028-C7 --: Ultra-low-power I2C RTC with similar functionality and small package; a good option when low current consumption matters, but pinout and register map need verification.

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