ISL12082: 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.

Key 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
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1549: Addressing Power Issues in Real Time Clock ApplicationsPDF13 Nov 201469 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL12082 DatasheetPDF25 Sep 2015525 KB
Tech Briefs
TitleTypeUpdatedSizeOther Languages
TB481: Using ISL12058 as a Low Cost Alternative to ISL1208 and ISL12082PDF19 Nov 201449 KB
User Guides
TitleTypeUpdatedSizeOther Languages
Real Time Clock USB Evaluation Board User GuidePDF12 May 2015487 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL12082IB8Z8 Ld SOIC0.07281260RoHS
ISL12082IB8Z-T8 Ld SOIC T+R0.07281260RoHS
ISL12082IUZ10 Ld MSOP0.026101260RoHS
ISL12082IUZ-T10 Ld MSOP T+R0.026101260RoHS
ISLUSB-RTC-EV1ZMBN/ARoHS
ISL12082 Datasheet 25 Sep 2015
8 Ld SOIC T+R ISL84514
10 Ld MSOP T+R ISL43410
ISL12082
AN1549: Addressing Power Issues in Real Time Clock Applications 13 Nov 2014
TB481: Using ISL12058 as a Low Cost Alternative to ISL1208 and ISL12082 19 Nov 2014
Real Time Clock USB Evaluation Board User Guide 12 May 2015