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
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