Overview
The M41T83RQA6F is a serial I²C bus real-time clock (RTC) produced by STMicroelectronics. This component is part of the M41T8x family, which are known for their low-power consumption and robust feature set. The M41T83RQA6F is particularly useful in applications requiring precise timekeeping and battery backup capabilities. It features an integrated 32.768 kHz oscillator and supports various package options, including a 16-lead QFN package.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage (VCC) | 2.7 V to 5.5 V |
| Operating Temperature | –40 °C to 85 °C |
| Package Type | VFQFPN 16 4x4x1.0 |
| Interface | Serial I²C bus (400 kHz protocol) |
| Battery Supply Current | 365 nA |
| Accuracy | ±5 ppm typical after 2 reflows (SOX18 package) |
| NVRAM Size | 7 bytes |
| RoHS Compliance | Ecopack2 |
Key Features
- Ultra-low battery supply current of 365 nA
- Factory-calibrated accuracy of ±5 ppm typical after 2 reflows (SOX18 package)
- 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
- Programmable alarm with interrupt function (valid even during battery backup mode)
- Optional second programmable alarm
- 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 M41T83RQA6F is suitable for a wide range of applications that require precise timekeeping and low power consumption. These include:
- Industrial control systems
- Medical devices
- Consumer electronics
- Automotive systems
- IoT devices
Q & A
- What is the operating voltage range of the M41T83RQA6F?
The operating voltage range is 2.7 V to 5.5 V. - What is the typical accuracy of the M41T83RQA6F after 2 reflows?
The typical accuracy is ±5 ppm after 2 reflows for the SOX18 package. - What is the battery supply current of the M41T83RQA6F?
The battery supply current is 365 nA. - Does the M41T83RQA6F support I²C interface?
Yes, it supports the I²C bus (400 kHz protocol). - What is the operating temperature range of the M41T83RQA6F?
The operating temperature range is –40 °C to 85 °C. - Does the M41T83RQA6F have a watchdog timer?
Yes, it includes a watchdog timer. - How much NVRAM does the M41T83RQA6F have?
The M41T83RQA6F has 7 bytes of battery-backed user SRAM. - Is the M41T83RQA6F RoHS compliant?
Yes, it is RoHS compliant with Ecopack2. - What package options are available for the M41T83RQA6F?
The M41T83RQA6F is available in a VFQFPN 16 4x4x1.0 package. - Does the M41T83RQA6F have a square wave output?
Yes, the square wave output defaults to 32 KHz on power-up (M41T83 only).
