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  • The M41T0 real-time clock is a low power serial real-time clock with a built-in 32.768 kHz oscillator (external crystal controlled). Eight registers 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 bus. The built-in address register is incremented automatically after each WRITE or READ data byte.

    The M41T0 is supplied in 8-lead plastic small outline package.

    Key Features

    • Counters for seconds, minutes, hours, day, date, month, years, and century
    • 32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation
    • Oscillator stop detection monitors clock operation
    • Serial interface supports I2C bus (400 kHz protocol)
    • Low standby current 0.9 μA (typ at 3 V)
    • 2.0 to 5.5 V clock operating voltage
    • Special software programmable output
    • Operating temperature of –40 to 85 °C

Circuit Diagram

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Related Applications

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Embedded Software

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Technical Documentation

    • Description Version Size Action
      DS2949
      Serial real-time clock
      7.1
      304.76 KB
      PDF
      DS2949

      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
      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

Publications and Collaterals

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

      Serial real-time clock ICs

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M41T0M6F
Active
SO-8 Industrial Ecopack1

M41T0M6F

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Temperature (°C) Marketing Status
NVRAM size (B)
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
min
max
M41T0M6F Available at 9 distributors

Distributor availability ofM41T0M6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4865 1 Order Now
RS COMPONENTS EUROPE 4875 5 Order Now
AVNET AMERICA 21 0 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 14305 0 Order Now
Newark Element14 AMERICA 109 0 Order Now
P&S ASIA/PACIFIC 87 1 Order Now
MOUSER WORLDWIDE 5439 1 Order Now
Farnell Element14 EUROPE 2851 1 Order Now

Distributor reported inventory date: 2020-06-30

Distributor Name

DIGIKEY

Stock

4865

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

4875

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

21

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

14305

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

109

Min.Order

0

Region

AMERICA Order Now

P&S

Stock

87

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

5439

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2851

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-30

Get sample SO-8 Tape And Reel -40 85
Active
- EAR99 MOROCCO 0.834 / 1k

M41T0M6F

Package

SO-8

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.834 / 1k

Distributor availability ofM41T0M6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4865 1 Order Now
RS COMPONENTS EUROPE 4875 5 Order Now
AVNET AMERICA 21 0 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 14305 0 Order Now
Newark Element14 AMERICA 109 0 Order Now
P&S ASIA/PACIFIC 87 1 Order Now
MOUSER WORLDWIDE 5439 1 Order Now
Farnell Element14 EUROPE 2851 1 Order Now

Distributor reported inventory date: 2020-06-30

Distributor Name

DIGIKEY

Stock

4865

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

4875

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

21

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

14305

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

109

Min.Order

0

Region

AMERICA Order Now

P&S

Stock

87

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

5439

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2851

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-30

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.834 / 1k

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