Low Power RTC with Battery Backed SRAM and Event Detection

The ISL1221 device is a low power real time clock with Event Detect and Time Stamp function, timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching with separate FOUT output and 2 Bytes of 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 in Normal and Battery Backed modes
    - Event Detection During Battery Backed or Normal Modes
    - Selectable Event Input Sampling Rates Allows Low Power Operation
    - Selectable Glitch Filter on Event Input Monitor
• Separate FOUT pin with 15 Selectable Frequencies
• 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 (RoHS Compliant)

Applications
• Utility Meters
• Set Top Box/Modem
• POS Equipment
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• Fixed Broadband Wireless Equipment
• Test Meters/Fixtures
• Vending Machine Management
• Security and Anti Tampering Applications
    - Panel/Enclosure Status
    - Warranty Reporting
    - Time Stamping Applications
    - Patrol/Security Check (Fire or Light Equipment)
    - Automotive Applications