The ISL1209 device is a low power real time clock with Event Detect function, timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and battery-backed user SRAM.

FEATUREs
• Real Time Clock/Calendar
  - Tracks Time in Hours, Minutes, and Seconds
  - Day of the Week, Day, Month, and Year
• Security and Event Functions
  - Tamper detection with Time Stamp
  - Event Detection During Battery Packed or Normal Modes
  - Selectable Event Input Sampling Rates Allows Low Power Operation
  - Selectable Glitch Filter on Event Input Monitor
• 15 Selectable Frequency Outputs
• Single Alarm
  - Settable to the Second, Minute, Hour, Day of the Week,Day, or Month
  - Single Event or Pulse Interrupt Mode
• Automatic Backup to Battery or Super Cap
• Power Failure Detection
• On-Chip Oscillator Compensation
• 2 Bytes Battery-Backed User SRAM
• I2C Interface
- 400kHz Data Transfer Rate
• 400nA Battery Supply Current
• Small Package
  -10 Ld MSOP
• Pb-Free Plus Anneal Available (RoHS Compliant)