Overview
The M41T83SMY6F is a serial I²C bus real-time clock (RTC) produced by STMicroelectronics. This component is designed to provide accurate timekeeping and calendar functions, along with several advanced features such as battery switchover, programmable alarms, and a watchdog timer. It is suitable for a wide range of applications requiring precise time and date tracking.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 2.0 V to 5.5 V |
| Operating Temperature | -40 °C to 85 °C |
| Package Type | SO18 with embedded crystal |
| Interface | Serial I²C bus (400 kHz protocol) |
| Battery Supply Current | 365 nA (typical) |
| Timekeeping Accuracy | ±5 ppm (typical after 2 reflows) |
| Counters | Tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century |
| Alarm Function | Programmable alarm with interrupt function |
| Watchdog Timer | Available |
| SRAM | 7 bytes of battery-backed user SRAM |
| RoHS Compliance | Yes, lead-free components |
Key Features
- Ultra-low battery supply current of 365 nA
- Factory-calibrated accuracy of ±5 ppm typical after 2 reflows
- Programmable alarm with interrupt function, with an optional second programmable alarm
- Square wave output defaults to 32 KHz on power-up
- RESET (RST) output and watchdog timer
- Programmable 8-bit counter/timer
- Battery low flag and oscillator stop detection
- Battery or SuperCap™ backup
- Automatic switchover and reset output circuitry
Applications
The M41T83SMY6F is versatile and can be used in various applications, including:
- Consumer electronics such as smart home devices, appliances, and wearables
- Industrial control systems and automation
- Medical devices requiring precise timekeeping
- Automotive systems for time and date tracking
- Internet of Things (IoT) devices
Q & A
- What is the operating voltage range of the M41T83SMY6F?
The operating voltage range is from 2.0 V to 5.5 V. - What is the typical battery supply current of the M41T83SMY6F?
The typical battery supply current is 365 nA. - What is the accuracy of the M41T83SMY6F after 2 reflows?
The accuracy is ±5 ppm typical after 2 reflows. - Does the M41T83SMY6F support I²C bus protocol?
Yes, it supports the I²C bus protocol with a 400 kHz frequency. - What types of alarms are available on the M41T83SMY6F?
It has a programmable alarm with an interrupt function, and an optional second programmable alarm. - Does the M41T83SMY6F have a watchdog timer?
Yes, it includes a watchdog timer. - What is the package type of the M41T83SMY6F?
The package type is SO18 with an embedded crystal. - Is the M41T83SMY6F RoHS compliant?
Yes, it is RoHS compliant with lead-free components. - What is the operating temperature range of the M41T83SMY6F?
The operating temperature range is from -40 °C to 85 °C. - Does the M41T83SMY6F have battery-backed SRAM?
Yes, it has 7 bytes of battery-backed user SRAM.
