ISL12008: I2C Real Time Clock with Battery Backup Low Power RTC with Battery ReSeal™ Function

The ISL12008 device is a low power real time clock/calendar that is pin compatible and functionally equivalent to the ST M41T00S and Maxim DS1340 with timing and crystal compensation. The device additionally provides power-fail indicator, software alarm and intelligent battery backup.

The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, and seconds. 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
  • Pin Compatible to ST M41T00S and Maxim DS1340
  • Functionality Equivalent to ST M41T00S and Maxim DS1340
  • Real Time Clock/Calendar
    • Tracks Time in Hours, Minutes, Seconds and Sub-seconds
    • Day of the Week, Day, Month, and Year
  • 512Hz Frequency Outputs for On-Chip Crystal Compensation
  • Software Alarm
    • Settable to the Second, Minute, Hour, Day of the Week, Day, or Month
  • Automatic Low-Drop Battery Switch for Longest Backup Life
  • Power Failure Detection
  • Battery ReSeal™ for Long Shelf Life
  • I2C Bus™
    • 400kHz Data Transfer Rate
  • 800nA Battery Supply Current
  • Small Package Option
    • 8 Ld SOIC
  • 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
  • Other Industrial/Medical/Automotive
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1549: Addressing Power Issues in Real Time Clock ApplicationsPDF13 Nov 201469 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL12008 DatasheetPDF17 Nov 2014284 KB
Software
TitleTypeUpdatedSizeOther Languages
Real Time Clock (RTC) Evaluation Installer for Windows 2000EXE31 Oct 20141.62 MB
Real Time Clock (RTC) Evaluation Installer for Windows 8EXE31 Oct 20147.85 MB
Real Time Clock (RTC) Evaluation Installer for Windows XP / Windows 7EXE31 Oct 20143.02 MB
Tech Briefs
TitleTypeUpdatedSizeOther Languages
TB479: Replacing the M41T00S and DS1340 RTC with the ISL12008PDF19 Nov 201416 KB
User Guides
TitleTypeUpdatedSizeOther Languages
Real Time Clock USB Evaluation Board User GuidePDF12 May 2015487 KB
Miscellaneous
TitleTypeUpdatedSizeOther Languages
RTC WIN8 Preinstallation ProcedurePDF19 Nov 2014849 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL12008IB8Z8 Ld SOIC0.07281260RoHS
ISL12008IB8Z-T8 Ld SOIC T+R0.07281260RoHS
ISL12008DBEV1ZN/ARoHS
ISL12008 Datasheet 17 Nov 2014
8 Ld SOIC T+R ISL84514
ISL12008
AN1549: Addressing Power Issues in Real Time Clock Applications 13 Nov 2014
Real Time Clock (RTC) Evaluation Installer for Windows 2000 31 Oct 2014
Real Time Clock (RTC) Evaluation Installer for Windows 8 31 Oct 2014
Real Time Clock (RTC) Evaluation Installer for Windows XP / Windows 7 31 Oct 2014
TB479: Replacing the M41T00S and DS1340 RTC with the ISL12008 19 Nov 2014
Real Time Clock USB Evaluation Board User Guide 12 May 2015
RTC WIN8 Preinstallation Procedure 19 Nov 2014