The ISL12026 device is a micro power real time clock with timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, and integrated 512 x 8 bit EEPROM configured in 16 Byte per page.
The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.

Features
• Real Time Clock/Calendar
   - Tracks Time in Hours, Minutes, and Seconds
   - Day of the Week, Day, Month, and Year
   - 3 Selectable Frequency Outputs
• Two Non-Volatile Alarms
   - Settable on the Second, Minute, Hour, Day of the Week,
      Day, or Month
   - Repeat Mode (periodic interrupts)
• Automatic Backup to Battery or SuperCap
• On-Chip Oscillator Compensation
   - Internal Feedback Resistor and Compensation
      Capacitors
   - 64 Position Digitally Controlled Trim Capacitor
   - 6 Digital Frequency Adjustment Settings to ±30ppm
• 512 x 8 Bits of EEPROM
   - 16-Byte Page Write Mode (32 total pages)
   - 8 Modes of BlockLock™ Protection
   - Single Byte Write Capability
• High Reliability
   - Data Retention: 50 years
   - Endurance: >2,000,000 Cycles Per Byte
• I2C Interface
   - 400kHz Data Transfer Rate
• 800nA Battery Supply Current
• Package Options
   - 8 Ld SOIC and 8 Ld TSSOP Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications
• Utility Meters
• HVAC Equipment
• Audio/Video Components
• Set Top Box/Television
• Modems
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• Fixed Broadband Wireless Equipment
• Pagers/PDA
• POS Equipment
• Test Meters/Fixtures
• Office Automation (Copiers, Fax)
• Home Appliances
• Computer Products
• Other Industrial/Medical/Automotive