M41T83

Active

Serial I²C bus real-time clock (RTC) with battery switchover

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Product overview

Description

The M41T8x are low-power serial I2C real-time clocks (RTCs) with a built-in 32.768 kHz oscillator (external crystal-controlled for the QFN16 and SO8 packages, embedded crystal for the SOX18 package). Eight bytes of the register map (see Table 2 on page 23) are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. An additional 17 bytes of the register map provide status/control of the two alarms, watchdog, 8-bit counter, and square wave functions. An additional seven bytes are made available as user SRAM. 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 M41T8x 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 battery when a power failure occurs.
Functions available to the user include a non-volatile, time-of-day clock/calendar, two alarm interrupts, watchdog timer, programmable 8-bit counter, and square wave outputs. The eight clock address locations contain the century, year, month, date, day, hour, minute, second, and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28, 29 (leap year), 30, and 31 day months are made automatically. The M41T83 is supplied in either a QFN16 or an SOX18, 300 mil SOIC which includes an embedded 32 KHz crystal. The SOX18 package requires only a user-supplied battery to provide non-volatile operation. The M41T82 is available only in an SO8 package.
  • All features

    • Ultra-low battery supply current of 365 nA
    • Factory-calibrated accuracy of ±5 ppm typical after 2 reflows (SOX18)
      • Much better accuracies achievable using built-in programmable analog and digital calibration circuits
    • 2.0 V to 5.5 V clock operating voltage
    • Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
    • Automatic switchover and reset output circuitry (fixed reference)
      • M41T83S: VCC= 3.00 V to 5.50 V
      • M41T83R: VCC= 2.70 V to 5.50 V
      • M41T83Z: VCC= 2.38 V to 5.50 V
    • Serial interface supports I2C bus (400 kHz protocol)
    • Programmable alarm with interrupt function (valid even during battery backup mode)
    • Optional 2ndprogrammable alarm available
    • Square wave output defaults to 32 KHz on power-up (M41T83 only)
    • RESET (RST) output
    • Watchdog timer
    • Programmable 8-bit counter/timer
    • 7 bytes of battery-backed user SRAM
    • Battery low flag
    • Low operating current of 80 μA
    • Oscillator stop detection
    • Battery or SuperCap™ backup
    • Operating temperature of –40 °C to 85 °C
    • Package options
      • a 16-lead QFN (M41T83)
      • an 8-lead SOIC (M41T82) or
      • an 18-lead embedded crystal SOIC (M41T83)
    • RoHS compliance: lead-free components are compliant with the RoHS directive

Circuit Diagram

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M41T83RMY6F
Active
SO18 with embedded crystal Industrial Ecopack1
M41T83RQA6F
Active
VFQFPN 16 4x4x1.0 Industrial Ecopack2
M41T83SMY6F
Active
SO18 with embedded crystal Industrial Ecopack1
M41T83SQA6F
Active
VFQFPN 16 4x4x1.0 Industrial Ecopack2
M41T83ZMY6F
Active
SO18 with embedded crystal Industrial Ecopack1
M41T83ZQA6F
Active
VFQFPN 16 4x4x1.0 Industrial Ecopack2

M41T83RMY6F

Package:

SO18 with embedded crystal

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO18 with embedded crystal

Grade

Industrial

RoHS Compliance Grade

Ecopack1

M41T83RQA6F

Package:

VFQFPN 16 4x4x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 16 4x4x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M41T83SMY6F

Package:

SO18 with embedded crystal

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO18 with embedded crystal

Grade

Industrial

RoHS Compliance Grade

Ecopack1

M41T83SQA6F

Package:

VFQFPN 16 4x4x1.0

Material Declaration**:

Marketing Status

Active

Package

VFQFPN 16 4x4x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M41T83ZMY6F

Package:

SO18 with embedded crystal

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO18 with embedded crystal

Grade

Industrial

RoHS Compliance Grade

Ecopack1

M41T83ZQA6F

Package:

VFQFPN 16 4x4x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 16 4x4x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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

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ECCN (US)
ECCN (EU)
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Temperature (°C) Budgetary Price (US$)*/Qty
More info
min
max
M41T83SMY6F Available at 4 distributors

Distributor availability ofM41T83SMY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1948 1 Order Now
Newark Element14 AMERICA 311 0 Order Now
MOUSER WORLDWIDE 2027 1 Order Now
Farnell Element14 EUROPE 1699 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

1948

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

311

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2027

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1699

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO18 with embedded crystal -40 85 1.965 / 1k
MORE INFO

NVRAM size (B):

7

Country of Origin:

PHILIPPINES

M41T83ZMY6F Available at 4 distributors

Distributor availability ofM41T83ZMY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 733 1 Order Now
Newark Element14 AMERICA 60 0 Order Now
MOUSER WORLDWIDE 858 1 Order Now
Farnell Element14 EUROPE 1146 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

733

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

60

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

858

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1146

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO18 with embedded crystal -40 85 1.965 / 1k
MORE INFO

NVRAM size (B):

7

Country of Origin:

PHILIPPINES

M41T83RQA6F Available at 2 distributors

Distributor availability ofM41T83RQA6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 32 1 Order Now
Newark Element14 AMERICA 50 0 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

32

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

50

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-05-14

Active
EAR99 NEC Tape And Reel VFQFPN 16 4x4x1.0 -40 85 1.318 / 1k
MORE INFO

NVRAM size (B):

7

Country of Origin:

MALAYSIA

M41T83ZQA6F Available at 1 distributors

Distributor availability ofM41T83ZQA6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 17 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

17

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-05-14

Active
EAR99 NEC Tape And Reel VFQFPN 16 4x4x1.0 -40 85 1.318 / 1k
MORE INFO

NVRAM size (B):

7

Country of Origin:

MALAYSIA

M41T83SQA6F Available at 3 distributors

Distributor availability ofM41T83SQA6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4213 1 Order Now
RS COMPONENTS EUROPE 400 1 Order Now
MOUSER WORLDWIDE 1841 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

4213

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

400

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1841

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-05-14

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel VFQFPN 16 4x4x1.0 -40 85 1.318 / 1k
MORE INFO

NVRAM size (B):

7

Country of Origin:

MALAYSIA

M41T83RMY6F Available at 4 distributors

Distributor availability ofM41T83RMY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5976 1 Order Now
AVNET AMERICA 4000 0 Order Now
MOUSER WORLDWIDE 379 1 Order Now
Farnell Element14 EUROPE 1496 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

5976

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

4000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

379

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1496

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO18 with embedded crystal -40 85 1.965 / 1k
MORE INFO

NVRAM size (B):

7

Country of Origin:

PHILIPPINES

M41T83SMY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.965 / 1k

Distributor availability ofM41T83SMY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1948 1 Order Now
Newark Element14 AMERICA 311 0 Order Now
MOUSER WORLDWIDE 2027 1 Order Now
Farnell Element14 EUROPE 1699 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

1948

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

311

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2027

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1699

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO18 with embedded crystal

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.965 / 1k

NVRAM size (B)

7

Country of Origin

PHILIPPINES

M41T83ZMY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.965 / 1k

Distributor availability ofM41T83ZMY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 733 1 Order Now
Newark Element14 AMERICA 60 0 Order Now
MOUSER WORLDWIDE 858 1 Order Now
Farnell Element14 EUROPE 1146 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

733

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

60

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

858

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1146

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO18 with embedded crystal

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.965 / 1k

NVRAM size (B)

7

Country of Origin

PHILIPPINES

M41T83RQA6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.318 / 1k

Distributor availability ofM41T83RQA6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 32 1 Order Now
Newark Element14 AMERICA 50 0 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

32

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

50

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 16 4x4x1.0

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.318 / 1k

NVRAM size (B)

7

Country of Origin

MALAYSIA

M41T83ZQA6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.318 / 1k

Distributor availability ofM41T83ZQA6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 17 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

17

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 16 4x4x1.0

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.318 / 1k

NVRAM size (B)

7

Country of Origin

MALAYSIA

M41T83SQA6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.318 / 1k

Distributor availability ofM41T83SQA6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4213 1 Order Now
RS COMPONENTS EUROPE 400 1 Order Now
MOUSER WORLDWIDE 1841 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

4213

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

400

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1841

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 16 4x4x1.0

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.318 / 1k

NVRAM size (B)

7

Country of Origin

MALAYSIA

M41T83RMY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.965 / 1k

Distributor availability ofM41T83RMY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5976 1 Order Now
AVNET AMERICA 4000 0 Order Now
MOUSER WORLDWIDE 379 1 Order Now
Farnell Element14 EUROPE 1496 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

5976

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

4000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

379

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1496

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO18 with embedded crystal

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.965 / 1k

NVRAM size (B)

7

Country of Origin

PHILIPPINES

(*) 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