Overview
The M41T11M6E from STMicroelectronics is a low-power serial real-time clock (RTC) designed for precise timekeeping and data storage. This component integrates a 32.768 kHz crystal oscillator and provides 56 bytes of non-volatile RAM (NVRAM) for general-purpose use. The M41T11M6E is particularly useful in applications requiring accurate time and date tracking, along with the ability to store small amounts of data. It operates as a slave device on a two-wire I²C bus, allowing for easy communication with other ICs in a system.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage | 2.0 to 5.5 | V |
| Battery Supply Current | 0.8 | μA (typ. at 3 V) |
| Oscillator Frequency | 32.768 | kHz |
| I²C Bus Frequency | 0 to 100 | kHz |
| Operating Temperature | -40 to 85 | °C |
| Package Types | 8-lead SOIC, 28-lead SOIC with SNAPHAT® | |
| NVRAM Capacity | 56 bytes | |
| Crystal Load Capacitance | 12.5 | pF |
Key Features
- Counters for seconds, minutes, hours, day, date, month, years, and century in binary-coded decimal (BCD) format.
- 32 kHz crystal oscillator with integrated load capacitance for high stability.
- Ultra-low battery supply current to conserve battery life.
- Automatic switchover and deselect circuitry for seamless power management.
- Software clock calibration to compensate for crystal deviation due to temperature.
- Automatic leap year compensation.
- 56 bytes of general-purpose NVRAM.
- I²C bus interface for serial communication.
- RoHS compliant and lead-free second-level interconnect.
Applications
The M41T11M6E is suitable for a variety of applications that require precise timekeeping and small data storage. These include:
- Consumer electronics such as set-top boxes, DVD players, and digital cameras.
- Industrial control systems and automation equipment.
- Medical devices that require accurate time and date tracking.
- Automotive systems, including navigation and infotainment systems.
- Smart home devices and IoT applications.
Q & A
- What is the primary function of the M41T11M6E?
The primary function of the M41T11M6E is to serve as a low-power serial real-time clock (RTC) with additional non-volatile RAM for data storage. - What is the frequency of the oscillator in the M41T11M6E?
The oscillator frequency is 32.768 kHz. - What is the operating voltage range of the M41T11M6E?
The operating voltage range is 2.0 to 5.5 volts. - How does the M41T11M6E handle power failures?
The device automatically switches to the battery supply during power failures and powers down into an ultra-low current mode to conserve battery life. - What type of bus interface does the M41T11M6E use?
The M41T11M6E uses an I²C bus interface for serial communication. - What is the capacity of the NVRAM in the M41T11M6E?
The NVRAM capacity is 56 bytes. - Is the M41T11M6E RoHS compliant?
Yes, the M41T11M6E is RoHS compliant and lead-free. - What are the typical package types for the M41T11M6E?
The typical package types are 8-lead SOIC and 28-lead SOIC with SNAPHAT®. - How does the M41T11M6E handle leap years?
The device includes automatic leap year compensation. - What is the typical battery supply current of the M41T11M6E?
The typical battery supply current is 0.8 μA at 3 V.
