Alarm Rtc, I2C, 4.4V, Qfn-16; Date Format:Day; Date; Month; Year; Century; Clock Format:Hh:Mm:Ss:Hh; Clock Ic Type:Alarm Rtc; Supply Voltage Min:1.3V; Supply Voltage Max:4.4V; Clock Ic Case Style:Qfn; No. Of Pins:16Pins; Msl:- Rohs Compliant: Yes |Stmicroelectronics M41T65Q6F

M41T65Q6F – I2C Alarm Real-Time Clock – STMicroelectronics

Streamline timekeeping in low-power embedded systems with the M41T65Q6F I2C Real-Time Clock IC from STMicroelectronics. This highly integrated solution delivers precise calendar/clock functions with ultra-low 0.95µA timekeeping current, ideal for battery-backed applications where power efficiency is critical. PCX ensures genuine STMicroelectronics components with same-day shipping and dedicated technical support.

Key Features

• Type: Clock/Calendar with Alarm & Watchdog Timer
• Interface: I2C Serial (2-Wire)
• Voltage Range: 1.3V to 4.4V Operation
• Ultra-Low Power: 0.7µA–0.95µA Timekeeping Current
• Date/Time Format: YY-MM-DD-dd / HH:MM:SS:hh (24hr)
• Temperature Range: -40°C to +85°C Industrial

Technical Specifications

Part of STMicroelectronics’ Timekeeper® series, this 16-pin QFN (3x3mm) RTC features leap-year compensation and century bit support. Its I2C interface simplifies integration with microcontrollers, while the 4.4V max voltage tolerance accommodates diverse power designs. The exposed pad QFN-16 package (MSL rating: see datasheet) ensures reliable surface-mount performance in harsh environments. Download full datasheet.

Typical Applications

• Smart Meters & Energy Monitoring Systems
• Industrial Automation Controllers
• Medical Portable Devices
• POS Terminals & Kiosks
• Backup Power Management Systems

About STMicroelectronics

STMicroelectronics is a global semiconductor leader with 40+ years of innovation in MEMS, power, and embedded solutions. Their components are renowned for industrial-grade reliability, serving automotive, industrial, and IoT markets with ISO-certified manufacturing.

STMicroelectronics’ Timekeeper® RTC series sets industry benchmarks for accuracy and power efficiency, with rigorous validation processes ensuring long-term stability in mission-critical applications. Their commitment to RoHS compliance and sustainable manufacturing aligns with modern design requirements.

About Real-Time Clocks (RTCs)

Real-Time Clocks maintain accurate timekeeping independent of main system power, using backup batteries or supercapacitors. They are essential for timestamping events, scheduling operations, and maintaining chronometric functions during power loss in embedded systems.

Modern RTCs like the M41T65Q6F integrate advanced features including temperature compensation, alarms, and watchdog timers, reducing external components and board space. Their ultra-low current draw (often <1µA) enables decade-long operation from coin cells, making them indispensable for portable and remote applications.

Packaging Options

Available in Tape & Reel (TR) for automated assembly or Cut Tape (CT) for prototyping. Specify preference at checkout.

Note: Product images are representational. Refer to datasheet for exact dimensions.

Frequently Asked Questions

Q: What backup voltage does this RTC support?
A: Operates from 1.3V–4.4V, compatible with most Li-ion batteries and supercapacitors.

Q: Does it automatically adjust for leap years?
A: Yes, includes leap-year compensation up to year 2100.

Q: Is the I2C address configurable?
A: Fixed I2C address (see datasheet), but multiple RTCs can share bus using the integrated /RESET pin.

Q: What is the timekeeping accuracy?
A: Typical ±2ppm at 25°C (±1 minute/year). Accuracy varies with temperature; see datasheet Section 5.5.

Q: Can it trigger microcontroller wake-ups?
A: Yes, the programmable alarm feature generates interrupts to wake sleeping hosts.

Q: Why choose an RTC instead of microcontroller timers?
A: RTCs maintain time during power loss with microamp current, unlike MCUs requiring constant power or complex firmware.

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