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