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  • The M41T00CAP is a low-power serial real-time clock (RTC) with integral battery and crystal in ST’s 24-pin CAPHAT™ package. It includes a crystal controlled, 32.768 kHz oscillator and has a built-in power sense circuit which detects power failures and automatically switches to the backup battery when a power failure occurs.

    Eight registers comprise the clock/calendar function and are configured in binary-coded decimal (BCD) format. Addresses and data are transferred serially via an industry standard, two line, 400 kHz, bidirectional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The internal lithium coin cell contains ample energy to sustain timekeeping operation for 10 years in the absence of system power. The eight clock address locations contain the century, year, month, date, day, hour, minute, and second in 24-hour BCD format. Corrections for the number of days in a month, including leap year, are made automatically (leap year valid up to year 2100).

    Key Features

    • Real-time clock (RTC) with backup battery integrated into package
    • Uses M41T00S enhanced RTC with precision switchover reference
    • 400 kHz I2C serial interface
    • Automatic switchover and deselect circuitry with fixed reference voltage
      • VCC = 2.7 to 5.5 V operating voltage range
      • 2.6 V (typ) power-fail deselect (switchover) threshold
    • Counters for seconds, minutes, hours, day, date, month, year and century
    • Software clock calibration
    • Low operating current of 300 µA
    • Oscillator stop detection
    • Battery backup
    • Operating temperature of 0 to 70 °C
    • Self-contained battery and crystal in CAPHAT™ DIP package
    • RoHS compliant
      • Lead-free second level interconnect

Circuit Diagram

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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
M41T00CAPPC1 PDIP 24 .7 Tube 0 70
NRND
- 1000 -
MORE INFO

ECCN (US):

EAR99

Country of Origin:

-

No availability of distributors reported, please contact our sales office

M41T00CAPPC1

Package

PDIP 24 .7

Packing Type

Tube

Unit Price (US$)

*

Operating Temperature (°C)

(min)

0

(max)

70

Marketing Status

NRND

Unit Price (US$)

-

Quantity

1000

NVRAM size (B)

-

ECCN (US)

EAR99

Country of Origin

-

(*) 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
      DS5772
      Serial access real-time clock (RTC) with integral backup battery and crystal
      6.0
      390.92 KB
      PDF
      DS5772

      Serial access real-time clock (RTC) with integral backup battery and crystal

    • 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 & 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**
M41T00CAPPC1
NRND
PDIP 24 .7 Industrial Ecopack1

M41T00CAPPC1

Package:

PDIP 24 .7

Material Declaration**:

Marketing Status

NRND

Package

PDIP 24 .7

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.