M41T81S Datasheet

IC型号：
M41T81S
PDF描述：
Serial Access Real-Time Clock with Alarms
文件大小：
441.27KB
PDF页数：
29页
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M41T81S

Serial Access Real-Time Clock with Alarms

FEATURES SUMMARY

鈻?/div>

COUNTERS FOR TENTHS/HUNDREDTHS

OF SECONDS, SECONDS, MINUTES,

HOURS, DAY, DATE, MONTH, YEAR, AND

CENTURY

32KHz CRYSTAL OSCILLATOR WITH

INTEGRATED LOAD CAPACITANCE

(12.5pF) WHICH PROVIDES EXCEPTIONAL

OSCILLATOR STABILITY AND HIGH

CRYSTAL SERIES RESISTANCE

OPERATION)

OSCILLATOR STOP DETECTION

(MONITORS CLOCK OPERATION)

SERIAL INTERFACE SUPPORTS I

C BUS

(400kHz PROTOCOL)

ULTRA-LOW BATTERY SUPPLY CURRENT

OF 0.6碌A (typ)

2.0 TO 5.5V CLOCK OPERATING VOLTAGE

AUTOMATIC SWITCHOVER AND

DESELECT CIRCUITRY (FIXED

REFERENCE) WHICH PROVIDES FULL

OPERATION IN 3.0V APPLICATIONS)

鈥?V

= 2.7 to 5.5V

2.5V

鈮?/div>

PFD

鈮?/div>

2.7V

POWER-DOWN TIME STAMP (HT BIT)

WHICH ALLOWS DETERMINATION OF

TIME ELAPSED IN BATTERY BACK-UP

BATTERY LOW FLAG

PROGRAMMABLE ALARM AND

INTERRUPT FUNCTION (valid even during

Battery Back-up Mode)

ACCURATE PROGRAMMABLE

WATCHDOG TIMER (from 62.5ms to 128s)

SOFTWARE CLOCK CALIBRATION (TO

COMPENSATE FOR CRYSTAL DEVIATION

DUE TO TEMPERATURE)

OPERATING TEMPERATURE OF 鈥?0 TO

85掳C

PACKAGE OPTIONS INCLUDE AN 8-LEAD

SOIC OR 18-LEAD EMBEDDED CRYSTAL

SOIC

Figure 1. Packages

SO8 (M)

8-pin SOIC

SOX18 (MY)*

18-pin (300mil) SOIC

with Embedded Crystal

* Contact local ST sales office for availability.

Rev 4.0

September 2005

1/29

型号

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