Overview
The M41T83ZMY6F is a serial I²C bus real-time clock (RTC) produced by STMicroelectronics. This component is part of the M41T8x series, known for its low-power consumption and robust features. It includes a built-in 32.768 kHz oscillator, which can be either external crystal-controlled or embedded, depending on the package. The M41T83ZMY6F is designed to provide accurate time-keeping with automatic switchover to a battery supply during power failures, ensuring continuous operation.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage (VCC) | 2.38 V to 5.50 V |
| Operating Temperature | –40 °C to 85 °C |
| Battery Supply Current | 365 nA |
| Factory-Calibrated Accuracy | ±5 ppm typical after 2 reflows (SOX18) |
| I²C Bus Protocol | 400 kHz |
| Package Options | 16-lead QFN, 18-lead SOIC with embedded crystal |
| RoHS Compliance | Lead-free components, compliant with RoHS directive |
| NVRAM Size | 7 bytes |
| Operating Current | 80 µA |
Key Features
- Ultra-low battery supply current of 365 nA
- Factory-calibrated accuracy of ±5 ppm typical after 2 reflows (SOX18)
- Programmable analog and digital calibration circuits for better accuracy
- Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
- Automatic switchover and reset output circuitry
- Serial interface supports I²C bus (400 kHz protocol)
- Programmable alarm with interrupt function (valid even during battery backup mode)
- Optional second programmable alarm available
- Square wave output defaults to 32 KHz on power-up (M41T83 only)
- RESET (RST) output
- Watchdog timer
- Programmable 8-bit counter/timer
- Battery low flag
- Oscillator stop detection
- Battery or SuperCap™ backup
Applications
The M41T83ZMY6F is suitable for a variety of applications requiring accurate time-keeping and low power consumption. These include:
- Industrial control systems
- Medical devices
- Consumer electronics
- Automotive systems
- IoT devices
- Any system requiring a reliable real-time clock with battery backup capabilities
Q & A
- What is the operating voltage range of the M41T83ZMY6F?
The operating voltage range is 2.38 V to 5.50 V. - What is the typical battery supply current of the M41T83ZMY6F?
The typical battery supply current is 365 nA. - What is the factory-calibrated accuracy of the M41T83ZMY6F after 2 reflows?
The factory-calibrated accuracy is ±5 ppm typical after 2 reflows (SOX18 package). - What communication protocol does the M41T83ZMY6F support?
The M41T83ZMY6F supports the I²C bus protocol with a 400 kHz frequency. - What are the package options available for the M41T83ZMY6F?
The package options include a 16-lead QFN and an 18-lead SOIC with an embedded crystal. - Does the M41T83ZMY6F have any user SRAM?
Yes, it has 7 bytes of battery-backed user SRAM. - What is the operating temperature range of the M41T83ZMY6F?
The operating temperature range is –40 °C to 85 °C. - Is the M41T83ZMY6F RoHS compliant?
Yes, the M41T83ZMY6F is RoHS compliant with lead-free components. - What additional features does the M41T83ZMY6F have besides time-keeping?
Besides time-keeping, it includes features such as programmable alarms, watchdog timer, programmable 8-bit counter/timer, and square wave output. - How does the M41T83ZMY6F handle power failures?
The M41T83ZMY6F automatically switches to the battery supply during power failures to maintain continuous operation.
