M41T83RQA6F

Real Time Clock Overview

The M41T83RQA6F is a low-power serial I2C real-time clock (RTC) manufactured by STMicroelectronics. It features an integrated 32.768 kHz oscillator and operates within a supply voltage range of 2.70 V to 5.50 V. The device includes automatic switchover circuitry for battery backup, ensuring continuous timekeeping. Key electrical parameters include a maximum timing current of 10 µA at 5.5 V and an operating temperature range from -40°C to +85°C. It utilizes a 16-VQFN package with a bare pad.

Real Time Clock Feature Summary

• Serial interface supporting I2C bus protocol up to 400 kHz
• Automatic power-fail detection and switchover to battery backup
• Programmable alarm with interrupt function valid during battery backup mode
• Built-in watchdog timer and programmable square wave output

Real Time Clock Applications

• Smart grid distribution systems
• Smart metering applications
• Industrial control systems requiring precise timekeeping

Real Time Clock Procurement Notes

Verify the specific suffix 'R' indicates the 2.70 V minimum supply voltage variant when sourcing. Confirm the QFN16 package availability and ensure compliance with RoHS3 standards as per the manufacturer's specifications. Check standard lead times as production cycles may vary.

Real Time Clock Selection Notes

Select this component for designs requiring I2C connectivity and low standby current. Ensure the system voltage supports the 2.70 V to 5.50 V operating range. Consider the 16-VQFN footprint for PCB layout constraints. Verify external crystal requirements if not using the embedded options available in other package variants.

Real Time Clock Part Context

This part belongs to the M41T83 family of real-time clocks, which are designed for low-power applications. The family shares common features such as calendar functions, alarms, and SRAM, but differs in supply voltage ranges and package types. The 'R' suffix specifically denotes the industrial grade with a 2.70 V lower voltage limit.

Real Time Clock Replacement Considerations

Direct substitutes within the same family include M41T83SQA6F (3.00 V min) and M41T83ZQA6F (2.38 V min). Ensure voltage compatibility when swapping between these variants. Other packages like SO8 or SOX18 offer different oscillator configurations.