The ISL12022 device is a low power real time clock with an embedded Temp sensor for oscillator compensation, clock/calendar, power fail, low battery monitor, brownout indicator, single periodic or polled alarms, intelligent battery-backup switching, Battery Reseal™ function and 128 bytes of battery-backed user SRAM. 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. Daylight Savings time adjustment is done automatically, using parameters entered by the user. Power fail and battery monitors offer user-selectable trip levels. A time stamp function records the time and date of switchover from VDD to VBAT power, and also from VBAT to VDD power.


  • Real Time Clock/Calendar - Tracks Time in Hours, Minutes and Seconds; Day of the Week, Day, Month, and Year
  • On-chip Oscillator Compensation Over the Operating Temperature Range - ±5ppm Over -40°C to +85°C
  • Customer Programmable Day Light Saving Time
  • 15 Selectable Frequency Outputs
  • 1 Alarm settable to the Second, Minute, Hour, Day of the Week, Day, or Month; Single Event or Pulse Interrupt Mode
  • Battery Reseal™ Function to Extend Battery Shelf Life
  • Automatic Backup to Battery or Super Capacitor
  • Oscillator Failure Detection
  • Time Stamp for First VDD to VBAT, and Last VBAT to VDD
  • 128 Bytes Battery-Backed User SRAM
  • I2C Bus™
  • 1µA Typical Battery Current
  • Pb-Free (RoHS Compliant)


  • Utility Meters
  • POS Equipment
  • Medical Devices
  • Security Systems
  • Vending Machines
  • White Goods
  • Printers and Copiers


タイトル language 分類 形式 サイズ 日付
star ISL12022 Datasheet データシート PDF 1.24 MB
Real Time Clock USB Evaluation Board User Guide マニュアル-開発ツール PDF 815 KB
AN1549: Addressing Power Issues in Real Time Clock Applications アプリケーションノート PDF 302 KB
AN1400: ISL12022 RTC Accuracy Optimization Calibration Procedure アプリケーションノート PDF 426 KB
PCN12085 - 8l, 14l, 16l SOIC w/ Gold Bond Wire @ ATP as Alternate Assembly Site 製品変更通知 PDF 152 KB
PCN11121 - Data Sheet Specification Change for Intersil Product ISL12022IBZ* 製品変更通知 PDF 117 KB
アナログIC & ディスクリート カタログ English カタログ PDF 6.48 MB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB
IDT Clock Generation Overview 概要 PDF 1.83 MB


タイトル language 分類 形式 サイズ 日付
RTC WIN8 Preinstallation Procedure ソフトウェア/ツール-その他 PDF 846 KB
Real Time Clock (RTC) Evaluation Installer for Windows 8 ライブラリ EXE 7.85 MB
Real Time Clock (RTC) Evaluation Installer for Windows 2000 ライブラリ EXE 1.62 MB
Real Time Clock (RTC) Evaluation Installer for Windows XP / Windows 7 ライブラリ EXE 3.02 MB


製品名 タイトル 分類 会社名
ISL120x-RTC-USB-Evaluation-System ISL120x Real Time Clock USB Evaluation System Evaluation Renesas