M41T83RQA6F

M41T83RQA6F is a real-time clock (RTC) IC from STMicroelectronics (M41T83 family). It provides persistent timekeeping and calendar functions even when main power is removed, thanks to a battery-backup supply, and it communicates with a host MCU over I2C (two-wire interface).
Key features (typical):
- Timekeeping and calendar: seconds, minutes, hours, day/date/month/year; leap-year aware; supports 12/24 hour formats.
- Alarms: programmable alarm outputs.
- Memory: small, battery-backed data RAM for event timing or data storage.
- Clock source: 32.768 kHz crystal input for a precise time base.
- Power: low-power operation with battery backup; suitable for power-sensitive applications.
- Package: typically an 8-pin package; RQA6F is a specific package/lot code for this variant.
Typical uses: time stamping, scheduling, data logging, wearable and portable devices.
Note: exact features and register map can vary by revision; consult the M41T83RQA6F datasheet for the precise voltage ranges, memory size, alarm/timer options, and programming sequences.

M41T83RQA6F is a real-time clock/calendar with I2C interface. Key features:
- I2C serial interface (2-wire, up to fast-mode 400 kHz)
- Real-time clock/calendar: seconds, minutes, hours, day, date, month, year; supports 12/24-hour mode and leap year
- Alarm and timer functions: two programmable alarms plus a timer with interrupt output
- 32.768 kHz crystal oscillator input for accurate timekeeping
- Square-wave output with selectable frequencies
- Battery-backed operation (VBAT) with automatic switchover when VCC is removed
- Trickle-charge circuit for backup power (external resistor/diode network)
- Low-power operation in battery mode
- 8-pin package (typical for RTCs)
This combination makes it suitable for timekeeping in power-fail environments, with interrupts for alarms/timers and flexible time formats.

8-pin SOIC (surface-mount) package.

8 pins (8-pin package, e.g., SO-8). Function: I2C real-time clock/calendar (RTC) with battery backup, providing timekeeping with optional alarm and a programmable square-wave/interrupt output.

- Manufacturer: STMicroelectronics (ST).
- What kind of company: A multinational semiconductor and electronics company that designs and manufactures integrated circuits, MEMS sensors, microcontrollers, power devices, and related components.

An I2C real-time clock with battery-backed timekeeping. Suitable for:
- Embedded systems needing accurate calendar/time, time stamping, scheduling and logging
- Alarm and wake-up timer applications
- Data loggers and consumer electronics (set-top boxes, cameras, media players)
- Networking/telecom equipment, industrial controls
- Automotive instrumentation and IoT/wearables requiring offline operation

Equivalent parts vary by features (interface, voltage, RAM). Closest cross-refs for ST M41T83RQA6F (I2C RTC with backup RAM) include:
- ST M41T00/M41T80 family (same vendor)
- NXP PCF8563 / PCF2129 (I2C RTC)
- Microchip MCP7940N / MCP79410 (I2C RTC with NVRAM)
- Maxim DS1307 / DS3231 (common I2C RTCs; RAM/backup differences)
Always verify voltage, pinout, and RAM size with datasheets.