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M41T62Q6F

Serial RTC, I2C, built-in crystal, 2 alarms, 350nA backup, QFN-16 3x3mm

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Manufacturer Part：

M41T62Q6F

Package：

QFN-16 (3.0 x 3.0 x 0.85 mm)

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Description

Product Overview

The M41T62Q6F from STMicroelectronics is a serial real-time clock (RTC) with I2C interface, featuring a built-in 32.768 kHz crystal oscillator. It provides time and calendar functions (seconds through century) with automatic leap year correction, two alarms, and a programmable square-wave output. Operating from 1.0V to 5.5V with 350 nA backup current, the QFN-16 (3x3mm) package minimizes board space.

Key Specifications

Type Serial RTC with Crystal
Interface I2C (400 kHz)
Crystal Built-in 32.768 kHz
Time/Calendar Sec to Century, auto leap year
Alarms 2 (alarm 1 with AF flag)
Supply Voltage 1.0V – 5.5V
Backup Current 350 nA (typical at 3.0V)
Square Wave Output 1 Hz to 32.768 kHz (prog)
Package QFN-16 (3 x 3 x 0.85 mm)
Operating Temp -40 to 85 C

Features

  • Built-in 32.768 kHz crystal eliminates external component
  • Ultra-low 350 nA backup current extends battery life
  • Two programmable alarm functions with interrupt output
  • I2C interface at 400 kHz for fast communication
  • Automatic leap year correction through 2100
  • Programmable square-wave output from 1 Hz to 32.768 kHz
  • Under-voltage sense and switchover to backup supply
  • Century bit for year 2000 rollover

Applications

  • Battery-backed real-time clock for embedded systems
  • Power metering and data logging timestamps
  • Automotive infotainment clock
  • Industrial PLC time stamping
  • Medical device event logging

The M41T62Q6F from STMicroelectronics is a serial real-time clock with an integrated 32.768 kHz crystal in a compact QFN-16 (3x3mm) package. It provides complete time and calendar functions from seconds to century with automatic leap year correction and century rollover. Two programmable alarms with interrupt output enable wake-up functions. Operating from 1.0V to 5.5V with only 350 nA typical backup current, it is optimized for battery-backed applications. The I2C interface supports 400 kHz fast mode, and a programmable square-wave output provides frequencies from 1 Hz to 32.768 kHz.

The M41T62Q6F integrates a 32.768 kHz tuning-fork crystal with the RTC die in a single package, eliminating external crystal selection and PCB layout concerns. The oscillator circuit uses a CMOS inverter with feedback and trimming capacitors for frequency adjustment. The time counters increment the seconds register, and carry logic propagates through minutes, hours, day, date, month, and year with automatic month-length and leap-year handling. The I2C slave interface responds to addresses 0xD0/0xD1 for read/write. Two alarm registers compare against time registers; when a match occurs, the AF flag is set and the INT pin is asserted. The backup switchover circuit automatically selects VCC or VBAT, whichever is higher.

Pin Name Type Function
1 OSCIN I/O Crystal oscillator input (internal)
2 OSCOUT I/O Crystal oscillator output (internal)
3 VCC Power Primary supply (1.0-5.5V)
4 VBAT Power Backup battery supply
5 SDA I/O I2C serial data
6 SCL Input I2C serial clock
7 INT Output Alarm interrupt output (active low)
8 SQW Output Programmable square-wave output
9-16 Misc – GND, NC, test pins
  • Embedded RTC: Battery-backed timekeeping for MCU-based systems
  • Data logging: Precise timestamps for industrial and medical records
  • Automotive: Infotainment system clock with ultra-low backup current
  • Power metering: Time-of-use tariff scheduling with alarm wake-up
  • Portable devices: Long battery life RTC with integrated crystal
Manufacturer Part Number Package Notes
ST M41T62MQ6F QFN-16 Automotive qualified version
NXP PCF8523T/1 SOIC-8 I2C RTC, 240nA, ext crystal
Microchip MCP7940N-I/SN SOIC-8 I2C RTC, 1.5uA, ext crystal
Maxim DS3231SN# SOIC-16 I2C RTC, TCXO, +/-2ppm
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

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  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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