Low-voltage Operation ̶ VCC = 1.8V to 5.5V User-selectable Internal Organization ̶ 1K: 128 x 8 or 64 x 16  3-wire Serial Interface 2MHz Clock Rate (5V) Self-timed Write Cycle (5ms Max)  igh Reliability ̶ Endurance: 1,000,000 Write Cycles ̶ Data Retention: 100 Years 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 8-lead PDIP, and 8-ball VFBGA Packages