M41T00S:Serial real-time clock (RTC)

The M41T00S is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator (external crystal controlled). Eight bytes of the SRAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a two line, bidirectional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte.

The M41T00S has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the clock operations can be supplied by a small lithium button supply when a power failure occurs. The eight clock address locations contain the century, year, month, date, day, hour, minute, and second in 24-hour BCD format. Corrections for 28, 29 (leap year - valid until year 2100), 30 and 31 day months are made automatically.

The M41T00S is supplied in an 8-pin SOIC.

Key Features

  • 2.0 to 5.5 V clock operating voltage
  • Counters for seconds, minutes, hours, day, date, month, year, and century
  • Software clock calibration
  • Automatic switchover and deselect circuitry (fixed reference)
    • VCC = 2.7 to 5.5 V 2.5 V ≤ VPFD ≤ 2.7 V
  • Serial interface supports I2 C bus (400 kHz protocol)
  • Low operating current of 300 μA
  • Oscillator stop detection
  • Battery or SuperCapTM backup
  • Operating temperature of –40 to 85 °C
  • Ultra-low battery supply current of 0.6 μA
Product Specifications
DescriptionVersionSize
DS4002: Serial real-time clock5.1307 KB
Application Notes
DescriptionVersionSize
AN3060: Applications guide for serial real-time clocks (RTCs)3.0878 KB
AN1011: Battery technology used in NVRAM and real-time clock (RTC) products from ST4.0248 KB
AN934: How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products4.1123 KB
AN4641: Integrating TIMEKEEPER® and real-time clock supervisor functions1.0479 KB
AN923: Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs4.0142 KB
AN1572: Power-down time-stamp function in serial real-time clocks (RTCs)2.0171 KB
AN1336: Power-fail comparator for NVRAM supervisory devices2.0127 KB
AN1012: Predicting the battery life and data retention period of NVRAMs and serial RTCs4.1439 KB
Brochures
DescriptionVersionSize
Serial real-time clock ICs1.0827 KB
Product Certifications
DescriptionVersionSize
Products Underwriter Laboratories (UL) Information2.1543 KB
Clocks and Timers Software
Part NumberManufacturerDescription
STSW-SRTC001STI2C code for Serial RTC
STSW-SRTC002STSPI code -Serial RTC
Sample & Buy
Part NumberPackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityNVRAM size (B)ECCN (EU)ECCN (US)Country of Origin
M41T00SM6FSO-8Tape And Reel-40851.2231000-NECEAR99MOROCCO
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
M41T00SM6FSO-8IndustrialEcopack1md_zm-wspc-so08-wspc-.15-wspc-jedec_bdzm-wspc-e6aa00s.pdf
md_zm-wspc-so08-wspc-.xml
Serial real-time clock M41T00S
circuit_diagram_10772_thumbnail.png M41T00S
串行实时时钟(RTC)应用指南 M41T60
ST NVRAM 和实时时钟(RTC)产品中使用的电池技术 M4Z28-BR00SH
How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products M41T60
集成TIMEKEEPER® 与实时时钟监控器功能 M41T60
Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs M41T60
串行实时时钟(RTC)的掉电时间戳功能 M41T60
Power-fail comparator for NVRAM supervisory devices M41T60
预测NVRAM 和串行RTC 的电池寿命和数据保存期限 M4Z28-BR00SH
Predicting the battery life and data retention period of NVRAMs and serial RTCs M4T28-BR12SH
Predicting the battery life and data retention period of NVRAMs and serial RTCs M4Z28-BR00SH
md_zm-wspc-so08-wspc-.15-wspc-jedec_bdzm-wspc-e6aa00s.pdf M41T00S
md_zm-wspc-so08-wspc-.xml M41T00S