M41T00CAP datasheet(1/24 Pages) STMICROELECTRONICS

Part #	M41T00CAP

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

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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M41T00CAP

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

and crystal

Datasheet - production data

Features

•

Real-time clock (RTC) with backup battery

integrated into package

•

Uses M41T00S enhanced RTC with

precision switchover reference

•

400 kHz I

2C 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

Description

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 I

2C 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).

24

1

PCDIP24

Battery/Crystal CAPHAT™

October 2014

DocID014557 Rev 6

1/24

This is information on a product in full production.

www.st.com

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