The ISL12058 device is a low power real time clock with clock/calendar, and alarm function. 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.


  • Real Time Clock/Calendar
  • Tracks Time in Hours, Minutes, and Seconds
  • Day of the Week, Date, Month, and Year
  • 4 Selectable Frequency Outputs
  • 2 Alarms
  • Settable to the Second, Minute, Hour, Day of the Week, Date, or Month
  • I2C Interface
  • 400kHz Data Transfer Rate
  • Small Package Options
  • 8 Ld 2mmx2mm µTDFN Package
  • 8 Ld 3mmx3mm TDFN Package
  • 8 Ld MSOP Package
  • 8 Ld SOIC Package
  • Pb-Free (RoHS Compliant)
  • Low Cost 3V Alternative to ISL1208 and ISL12082




  • 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
  • Point Of Sale Equipment
  • Test Meters/Fixtures
  • Office Automation (Copiers, Fax)
  • Home Appliances
  • Computer Products
  • Other Industrial/Medical/Automotive


Design & Development

Software & Tools

Software Downloads

Type Title Date
Software & Tools - Other PDF 846 KB
Library EXE 7.85 MB
Library EXE 1.62 MB
Library EXE 3.02 MB
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Boards & Kits

Boards & Kits