M41T00S

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Serial real-time clock (RTC)

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  • 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 I2C bus (400 kHz protocol)
    • Low operating current of 300 μA
    • Oscillator stop detection
    • Battery or SuperCapTMbackup
    • Operating temperature of –40 to 85 °C
    • Ultra-low battery supply current of 0.6 μA

Circuit Diagram

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Part Number
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
NVRAM size (B)
More info
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min
max
M41T00SM6F SO-8 Tape And Reel -40 85
Active
1.223 10000 -
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MOROCCO

Check Availability

Distributor availability ofM41T00SM6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10536 1 Order Now
RS COMPONENTS EUROPE 5759 1 Order Now
FUTURE WORLDWIDE 2075 1 Order Now
ARROW EUROPE 50000 0 Order Now
MOUSER WORLDWIDE 13085 1 Order Now
Farnell Element14 EUROPE 9571 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

10536

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5759

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2075

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

50000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

13085

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

9571

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-12

Get sample

M41T00SM6F

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

1.223*

Distributor availability ofM41T00SM6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10536 1 Order Now
RS COMPONENTS EUROPE 5759 1 Order Now
FUTURE WORLDWIDE 2075 1 Order Now
ARROW EUROPE 50000 0 Order Now
MOUSER WORLDWIDE 13085 1 Order Now
Farnell Element14 EUROPE 9571 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

10536

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5759

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2075

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

50000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

13085

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

9571

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-12

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

1.223

Quantity

10000

NVRAM size (B)

-

ECCN (US)

EAR99

Country of Origin

MOROCCO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Embedded Software

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS4002
      Serial real-time clock
      5.1
      307.35 KB
      PDF
      DS4002

      Serial real-time clock

    • Description Version Size Action
      AN3060
      Applications guide for serial real-time clocks (RTCs)
      3.0
      878.56 KB
      PDF
      AN1011
      Battery technology used in NVRAM and real-time clock (RTC) products from ST
      4.0
      248.17 KB
      PDF
      AN934
      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products
      4.1
      123.42 KB
      PDF
      AN4641
      Integrating TIMEKEEPER® and real-time clock supervisor functions
      1.0
      479.28 KB
      PDF
      AN923
      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs
      4.0
      142.23 KB
      PDF
      AN1572
      Power-down time-stamp function in serial real-time clocks (RTCs)
      2.0
      171.31 KB
      PDF
      AN1336
      Power-fail comparator for NVRAM supervisory devices
      2.0
      127.81 KB
      PDF
      AN1012
      Predicting the battery life and data retention period of NVRAMs and serial RTCs
      4.1
      439.45 KB
      PDF
      AN3060

      Applications guide for serial real-time clocks (RTCs)

      AN1011

      Battery technology used in NVRAM and real-time clock (RTC) products from ST

      AN934

      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products

      AN4641

      Integrating TIMEKEEPER® and real-time clock supervisor functions

      AN923

      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs

      AN1572

      Power-down time-stamp function in serial real-time clocks (RTCs)

      AN1336

      Power-fail comparator for NVRAM supervisory devices

      AN1012

      Predicting the battery life and data retention period of NVRAMs and serial RTCs

Publications and Collaterals

    • Description Version Size Action
      Serial real-time clock ICs 1.0
      827.11 KB
      PDF

      Serial real-time clock ICs

Quality & Reliability

    • Description Version Size Action
      Products Underwriter Laboratories (UL) Information 2.1
      543.21 KB
      PDF

      Products Underwriter Laboratories (UL) Information

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M41T00SM6F
Active
SO-8 Industrial Ecopack1

M41T00SM6F

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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