5.0 V, 1 Mbit (128 Kb x 8) TIMEKEEPER® SRAM

Features ■ 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 voltage VCC = 4.5 to 5.5 V; 4.1 V ≤ VPFD