Overview
The M41T80M6F is a low-power serial real-time clock (RTC) produced by STMicroelectronics. It features a built-in 32.768 kHz oscillator that is external crystal controlled, providing high stability and accuracy. The device uses eight registers for the clock/calendar function, configured in binary coded decimal (BCD) format, and an additional 12 registers for alarm, 32 KHz output, and square wave functions. Data is transferred serially via a two-line, bi-directional I2C interface. The M41T80M6F is supplied in an 8-pin SOIC package and supports a wide operating temperature range of –40 to 85 °C.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Voltage | 2.0 to 5.5 | V |
| Operating Current | 200 | µA |
| Operating Temperature | –40 to 85 | °C |
| Oscillator Frequency | 32.768 | kHz |
| I2C Bus Frequency | 400 | kHz |
| Package Type | 8-pin SOIC | |
| RoHS Compliance | Ecopack3 |
Key Features
- Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
- 32 KHz crystal oscillator integrating load capacitance (12.5 pF) for exceptional oscillator stability
- Serial interface supporting I2C bus (400 kHz)
- 32 KHz square wave output on power-up to drive a microcontroller in low-power mode
- Programmable (1 Hz to 32 KHz) square wave output
- Programmable alarm and interrupt function
- Low operating current of 200 µA
- Operating temperature range of –40 to 85 °C
- ECOPACK® package available
Applications
The M41T80M6F is suitable for various industrial and consumer applications where accurate timekeeping is essential. It can be used in:
- Industrial automation systems
- Consumer electronics such as clocks, timers, and calendar devices
- Medical devices requiring precise timekeeping
- Automotive systems for time and date functions
- Embedded systems and microcontrollers needing a low-power RTC solution
Q & A
- What is the primary function of the M41T80M6F?
The primary function of the M41T80M6F is to provide a low-power serial real-time clock (RTC) with alarm and square wave output capabilities.
- What is the operating voltage range of the M41T80M6F?
The operating voltage range of the M41T80M6F is 2.0 to 5.5 V.
- What type of interface does the M41T80M6F use for data transfer?
The M41T80M6F uses a two-line, bi-directional I2C interface for data transfer.
- What is the frequency of the oscillator in the M41T80M6F?
The oscillator frequency in the M41T80M6F is 32.768 kHz.
- What is the package type of the M41T80M6F?
The M41T80M6F is supplied in an 8-pin SOIC package.
- What are the key features of the M41T80M6F's oscillator?
The oscillator integrates load capacitance (12.5 pF) and provides exceptional oscillator stability and high crystal series resistance operation.
- Does the M41T80M6F support programmable square wave output?
Yes, the M41T80M6F supports programmable square wave output from 1 Hz to 32 KHz.
- What is the operating current of the M41T80M6F?
The operating current of the M41T80M6F is 200 µA.
- What is the operating temperature range of the M41T80M6F?
The operating temperature range of the M41T80M6F is –40 to 85 °C.
- Is the M41T80M6F RoHS compliant?
Yes, the M41T80M6F is RoHS compliant with an ECOPACK3 package.
