Document
M48T248Y M48T248V
5.0 or 3.3V, 1024K TIMEKEEPER® SRAM with PHANTOM
FEATURES SUMMARY
■ 5.0V OR 3.3V OPERATING VOLTAGE
Figure 1. 32-pin, DIP Package
■ 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 t(sDESELECT CIRCUITRY
■ CHOICE OF POWER-FAIL DESELECT
ucVOLTAGES: d(VPFD = Power-fail Deselect Voltage): ro– M48T248Y: 4.25V ≤ VPFD ≤ 4.50V P– M48T248V: 2.80V ≤ VPFD ≤ 2.97V te■ FULL 10% VCC OPERATING RANGE le■ OVER 10 YEARS’ DATA RETENTION IN
THE ABSENCE OF POWER
so■ WATCH FUNCTION IS TRANSPARENT TO bRAM OPERATION
O■ 128K x 8 NV SRAM DIRECTLY REPLACES Obsolete Product(s) -VOLATILE STATIC RAM OR EEPROM
32 1
PMDIP32 (PM)
February 2005
1/24
M48T248Y, M48T248V
TABLE OF CONTENTS
FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .