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M41T256YMT fiches techniques PDF

ST Microelectronics - 256 Kbit 32K x8 SERIAL RTC

Numéro de référence M41T256YMT
Description 256 Kbit 32K x8 SERIAL RTC
Fabricant ST Microelectronics 
Logo ST Microelectronics 





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M41T256YMT fiche technique
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M41T256Y
256 Kbit (32K x8) Serial RTC
FEATURES SUMMARY
5V OPERATING VOLTAGE
SERIAL INTERFACE SUPPORTS
EXTENDED I2C BUS ADDRESSING
(400kHz)
AUTOMATIC SWITCH-OVER AND
DESELECT CIRCUITRY
POWER-FAIL DESELECT VOLTAGES:
– M41T256Y: VCC = 4.5 to 5.5V;
VPFD = 4.2 < VPFD < 4.5V
COUNTERS FOR TENTHS/HUNDREDTHS
OF SECONDS, SECONDS, MINUTES,
HOURS, DAY, DATE, MONTH, and YEAR
PROGRAMMABLE SOFTWARE CLOCK
CALIBRATION
32,752 BYTES OF GENERAL PURPOSE
RAM
MICROPROCESSOR POWER-ON RESET
HOLDS MICROPROCESSOR IN RESET
UNTIL SUPPLY VOLTAGE REACHES
STABLE OPERATING LEVEL
AUTOMATIC ADDRESS-INCREMENTING
TAMPER INDICATION CIRCUIT WITH TIME-
STAMP
SLEEP MODE FUNCTION
PACKAGING INCLUDES A 44-LEAD SOIC
AND SNAPHAT® TOP (to be ordered
separately)
SOIC PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT® TOP
WHICH CONTAINS THE BATTERY AND
CRYSTAL
Figure 1. 44-pin, Hatless SOIC Package
44
1
SO44 (MT)
Figure 2. 44-pin SOIC Package
SNAPHAT (SH)
Crystal/Battery
44
1
SOH44 (MH)
June 2004
1/27

PagesPages 27
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