M41T00

Active

Serial real-time clock (RTC)

Download datasheet

Order from our eStore and our distributors

Buy now
Overview
Tools & Software
Resources
Solutions
Quality & Reliability
Sales Briefcase
eDesignSuite
Get Started
Sample & Buy
Partner products
  • The M41T00 is a low power serial real-time clock with a built-in 32.768 kHz oscillator (external crystal controlled). Eight bytes of the RAM 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 M41T00 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium coin cell.
    Typical data retention time is in excess of 5 years with a 50 mA/h 3 V lithium cell.
    The M41T00 is supplied in an 8-lead plastic small outline package.

    Key Features

    • For new designs use M41T00S
    • Counters for seconds, minutes, hours, day, month, years, and century
    • 32 kHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation
    • Serial interface supports I2C bus (100 kHz protocol)
    • Ultra low battery supply current of 0.8 μA (typ at 3 V)
    • 2.0 to 5.5 V clock operating voltage
    • Automatic switchover and deselect circuitry (for 3 V application select M41T00S datasheet)
    • Software clock calibration to compensate crystal deviation due to temperature
    • Automatic leap year compensation
    • Operating temperature of -40 to 85 °C

Circuit Diagram

Download Download

Sample & Buy

Part Number
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
NVRAM size (B)
More info
Order from Distributors
Order from ST
min
max
M41T00M6F SO-8 Tape And Reel -40 85
Active
1.223 10000 -
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MOROCCO

Check Availability

Distributor availability ofM41T00M6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 19644 1 Order Now
COMPEL EUROPE 2929 1 Order Now
RS COMPONENTS EUROPE 11150 5 Order Now
FUTURE WORLDWIDE 10021 1 Order Now
ARROW EUROPE 22500 0 Order Now
ARROW AMERICA 15000 2500 Order Now
MOUSER WORLDWIDE 5433 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

19644

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2929

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

11150

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

10021

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

22500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

15000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

5433

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-12

Buy now

M41T00M6F

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

1.223*

Distributor availability ofM41T00M6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 19644 1 Order Now
COMPEL EUROPE 2929 1 Order Now
RS COMPONENTS EUROPE 11150 5 Order Now
FUTURE WORLDWIDE 10021 1 Order Now
ARROW EUROPE 22500 0 Order Now
ARROW AMERICA 15000 2500 Order Now
MOUSER WORLDWIDE 5433 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

19644

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2929

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

11150

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

10021

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

22500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

15000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

5433

Min.Order

1

Region

WORLDWIDE 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

Recommended for you

Embedded Software

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS1447
      Serial real-time clock
      10.0
      336.2 KB
      PDF
      DS1447

      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
      AN922
      Using a Super Cap to back up the M41T56, M41T00, M41T11, M41T81, M41T94, and M41ST84W (16-pin)
      2.1
      84.5 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

      AN922

      Using a Super Cap to back up the M41T56, M41T00, M41T11, M41T81, M41T94, and M41ST84W (16-pin)

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      Ibis model 1.0
      8.28 KB
      ZIP

      Ibis model

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**
M41T00M6F
Active
SO-8 Industrial Ecopack1

M41T00M6F

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.

Support & Feedback