M41T81M ST Microelectronics, M41T81M Datasheet
M41T81M
Manufacturer Part Number
M41T81M
Description
SERIAL ACCESS RTC WITH ALARMS
Manufacturer
ST Microelectronics
Datasheet
1.M41T81M.pdf
(28 pages)
Available stocks
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ST
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FEATURES SUMMARY
September 2003
Rev. 2.0
2.0 TO 5.5V CLOCK OPERATING VOLTAGE
COUNTERS FOR TENTHS/HUNDREDTHS
OF SECONDS, SECONDS, MINUTES,
HOURS, DAY, DATE, MONTH, YEAR, and
CENTURY
AUTOMATIC SWITCH-OVER and DESELECT
CIRCUITRY
SERIAL INTERFACE SUPPORTS I
(400KHz PROTOCOL)
PROGRAMMABLE ALARM and INTERRUPT
FUNCTION (valid even during Battery Back-up
Mode)
WATCHDOG TIMER
LOW OPERATING CURRENT OF 400µA
BATTERY BACK-UP NOT RECOMMENDED
FOR 3.0V APPLICATIONS (CAPACITOR
BACK-UP ONLY)
BATTERY OR SUPER-CAP BACK-UP
OPERATING TEMPERATURE OF –40 TO
85°C
ULTRA-LOW BATTERY SUPPLY CURRENT
OF 1 A
PACKAGE OPTIONS INCLUDE A 28-LEAD or
18-LEAD EMBEDDED CRYSTAL SOIC
2
C BUS
SERIAL ACCESS RTC WITH ALARMS
Figure 1. 8-pin SOIC Package
Figure 2. 28-pin (300mil) SOIC Package*
Figure 3. 18-pin (300mil) SOIC Package*
EMBEDDED Crystal
EMBEDDED Crystal
SOX28 (MX)
18
SOX18 (MY)
SO8 (M)
8
1
1
M41T81
1/28
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