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


Document title Document type
Date Date
PDF 941 KB Datasheet
PDF 283 KB Application Note
PDF 302 KB Application Note
PDF 4.91 MB 日本語 Brochure
PDF 815 KB Manual - Development Tools
PDF 243 KB Other
PDF 1.83 MB Overview
PDF 363 KB Product Advisory
PDF 178 KB Product Change Notice
PDF 152 KB Product Change Notice
PDF 117 KB Product Change Notice
11 items

Design & Development

Software & Tools

Software Downloads

Software title Software type Type Date Date
EXE 7.85 MB Library
EXE 1.62 MB Library
EXE 3.02 MB Library
PDF 846 KB Software & Tools - Other
4 items

Boards & Kits

Boards & Kits