Overview
The M41T83RMY6F is a serial I²C bus real-time clock (RTC) with battery switchover, manufactured by STMicroelectronics. This component is part of the M41T8x family, known for its low power consumption and high accuracy. It features a built-in 32.768 kHz oscillator, which can be external crystal-controlled or embedded, depending on the package. The M41T83RMY6F is designed to provide a non-volatile time-of-day clock/calendar function, along with various other features such as alarms, a watchdog timer, and a programmable 8-bit counter.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 2.70 V to 5.50 V (M41T83R) |
| Battery Supply Current | 365 nA (ultra-low) |
| Accuracy | ±5 ppm typical after 2 reflows (SOX18) |
| Operating Temperature | –40 °C to 85 °C |
| Package Options | SO18 with embedded crystal |
| Serial Interface | I²C bus (400 kHz protocol) |
| Memory | 7 bytes of battery-backed user SRAM |
| RoHS Compliance | Lead-free components, compliant with RoHS directive |
Key Features
- Ultra-low battery supply current of 365 nA
- Factory-calibrated accuracy of ±5 ppm typical after 2 reflows (SOX18)
- Much better accuracies achievable using built-in programmable analog and digital calibration circuits
- Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
- Automatic switchover and reset output circuitry (fixed reference)
- Programmable alarm with interrupt function (valid even during battery backup mode)
- Optional 2nd 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
- Low operating current of 80 µA
- Oscillator stop detection
- Battery or SuperCap™ backup
Applications
The M41T83RMY6F is suitable for a variety of applications requiring precise timekeeping and low power consumption. These include:
- Industrial control systems
- Medical devices
- Consumer electronics
- Automotive systems
- IoT devices
- Any system requiring a reliable and accurate real-time clock with battery backup capabilities
Q & A
- What is the operating voltage range of the M41T83RMY6F?
The operating voltage range is 2.70 V to 5.50 V.
- What is the typical battery supply current of the M41T83RMY6F?
The typical battery supply current is 365 nA.
- What is the accuracy of the M41T83RMY6F after 2 reflows?
The accuracy is ±5 ppm typical after 2 reflows (SOX18).
- What are the package options for the M41T83RMY6F?
The M41T83RMY6F is available in an SO18 package with an embedded crystal.
- Does the M41T83RMY6F support I²C communication?
- How much user SRAM is available on the M41T83RMY6F?
There are 7 bytes of battery-backed user SRAM.
- Is the M41T83RMY6F RoHS compliant?
- What is the operating temperature range of the M41T83RMY6F?
The operating temperature range is –40 °C to 85 °C.
- Does the M41T83RMY6F have a watchdog timer?
- Can the M41T83RMY6F be used in automotive systems?
