M48T248V Datasheet - STMicroelectronics

SUMMARY DESCRIPTION
The M48T248Y/V TIMEKEEPER® RAM is a 128Kbit x 8 non-volatile static RAM and real time clock organized as 131,072 words by 8 bits.
   
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):
    – M48T248Y: 4.25V ≤ VPFD ≤ 4.50V
    – M48T248V: 2.80V ≤ VPFD ≤ 2.97V
■ FULL 10% VCC OPERATING RANGE
■ OVER 10 YEARS’ DATA RETENTION IN
    THE ABSENCE OF POWER
■ WATCH FUNCTION IS TRANSPARENT TO
    RAM OPERATION
■ 128K x 8 NV SRAM DIRECTLY REPLACES
    VOLATILE STATIC RAM OR EEPROM