Low Power RTC with Battery ReSeal™, 2 IRQs, Hundredths of a Second Time, and Crystal Compensation

The ISL12082 device is a low power real time clock with timing and crystal compensation, clock/calendar, power fail indicator, 2 IRQs, periodic or polled alarm, timer/watchdog, and intelligent battery backup switching.

The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, seconds and hundredths of a second. 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, Seconds, and Hundredths of a Second

- Day of the Week, Day, Month, and Year

• 4 Selectable Frequency Outputs

• Alarm

- Settable to the Second, Minute, Hour, Day of the Week, Day, or Month

- Single Event or Pulse Interrupt Mode

• Timer

- 4 Selectable Timer Functions

- 4 Selectable Timer Clock Frequencies

- Single Event or Pulse Interrupt Mode

• Automatic Backup to Battery or Supercapacitor

• Power Failure Detection

• Battery ReSeal™

• On-Chip Oscillator Compensation

• I2C Interface

- 400kHz Data Transfer Rate

• 800nA Battery Supply Current

• Small Package Options

- 8 Ld SOIC Package

- 10 Ld MSOP Package

• Pb-Free (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