M41T0

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Serial real-time clock (RTC)

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Product overview

Description

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.

  • All 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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STMicroelectronics - M41T0

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M41T0M6F
Active
SO-8 Industrial Ecopack3

M41T0M6F

Package:

SO-8

Material Declaration**:

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Marketing Status

Active

Package

SO-8

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Industrial

RoHS Compliance Grade

Ecopack3

(**) 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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M41T0M6F
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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors