M48T248Y Datasheet, PDF (1/24 Pages) STMicroelectronics – 5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM

M48T248Y
M48T248V
5.0 or 3.3V, 1024K TIMEKEEPER^® SRAM with PHANTOM
FEATURES SUMMARY
s 5.0V OR 3.3V OPERATING VOLTAGE
s REAL TIME CLOCK KEEPS TRACK OF
TENTHS/HUNDREDTHS OF SECONDS,
SECONDS, MINUTES, HOURS, DAYS, DATE
OF THE MONTH, MONTHS, and YEARS
s AUTOMATIC LEAP YEAR CORRECTION
VALID UP TO THE YEAR 2100
s AUTOMATIC SWITCH-OVER and DESELECT
CIRCUITRY
s CHOICE OF POWER-FAIL DESELECT
VOLTAGES:
(V_PFD = Power-fail Deselect Voltage):
– M48T248Y: 4.25V ≤ V_PFD ≤ 4.50V
– M48T248V: 2.80V ≤ V_PFD ≤ 2.97V
s FULL 10% V_CC OPERATING RANGE
s OVER 10 YEARS’ DATA RETENTION IN THE
ABSENCE OF POWER
s WATCH FUNCTION IS TRANSPARENT TO
RAM OPERATION
s 128K x 8 NV SRAM DIRECTLY REPLACES
VOLATILE STATIC RAM OR EEPROM
Figure 1. 32-pin, DIP Package
32
1
PMDIP32 (PM)
March 2003
Rev. 2.0
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