M48T251YPM datasheet(1/24 Pages) STMICROELECTRONICS

Il numero della parte	M48T251YPM

Spiegazioni elettronici	5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM

PDF	24 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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February 2005

M48T251Y

M48T251V

5.0 or 3.3V, 4096K TIMEKEEPER® SRAM with PHANTOM

FEATURES SUMMARY

■

5.0V OR 3.3V OPERATING VOLTAGE

■

REAL TIME CLOCK KEEPS TRACK OF

TENTHS/HUNDREDTHS OF SECONDS,

SECONDS, MINUTES, HOURS, DAYS,

DATE OF THE MONTH, MONTHS, AND

YEARS

■

AUTOMATIC LEAP YEAR CORRECTION

VALID UP TO THE YEAR 2100

■

AUTOMATIC SWITCH-OVER AND

DESELECT CIRCUITRY

■

CHOICE OF POWER-FAIL DESELECT

VOLTAGES:

(VPFD = Power-fail Deselect Voltage):

–

M48T251Y: 4.25V

≤ V

PFD

≤ 4.50V

–

M48T251V: 2.80V

≤ V

PFD

≤ 2.97V

■

FULL 10% VCC OPERATING RANGE

■

OVER 10 YEARS’ DATA RETENTION IN

THE ABSENCE OF POWER

■

WATCH FUNCTION IS TRANSPARENT TO

RAM OPERATION

■

512K x 8 NV SRAM DIRECTLY REPLACES

VOLATILE STATIC RAM OR EEPROM

Figure 1. 32-pin, DIP Package

32

1

PMDIP32 (PM)

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