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.
0V ■ CONVENTIONAL SRAM OPERATION;
UNLIMITED WRITE CYCLES
■ SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY APPLICATIONS
■ 10 YEARS OF DATA RETENTION AND CLOCK OPERATION IN THE ABSENCE OF POWER
■ SELF-CONTAINED BATTERY AND ...