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M48T128Y M48T128V*
5.0 or 3.3V, 1 Mbit (128 Kb x 8) TIMEKEEPER® SRAM
FEATURES SUMMARY
■ INTEGRATED, ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY, AND CRYSTAL
■ BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, AND SECONDS
■ AUTOMATIC POWER-FAIL CHIP DESELECT AND WRITE PROTECTION
■ WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage): – M48T128Y: VCC = 4.5 to 5.5V
4.1V ≤ VPFD ≤ 4.5V – M48T128V*: VCC = 3.0 to 3.6V
2.7V ≤ VPFD ≤ 3.