The ISL1208 device is a low power real time clock with timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and 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.


  • Real Time Clock/Calendar
  • Tracks Time in Hours, Minutes, and Seconds
  • Day of the Week, Day, Month, and Year
  • 15 Selectable Frequency Outputs
  • Single Alarm
  • Settable to the Second, Minute, Hour, Day of the Week, Day, or Month
  • Single Event or Pulse Interrupt Mode
  • Automatic Backup to Battery or Super Capacitor
  • Power Failure Detection
  • On-Chip Oscillator Compensation
  • 2 Bytes Battery-Backed User SRAM
  • I2C Interface
  • 400kHz Data Transfer Rate
  • 400nA Battery Supply Current
  • Same Pin Out as ST M41Txx and Maxim DS13xx Devices
  • Small Package Options
  • 8 Ld MSOP and SOIC Packages
  • 8 Ld TDFN Package
  • Pb-Free Available (RoHS Compliant)


  • 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


文档标题 language 类型 文档格式 文件大小 日期
star ISL1208 Datasheet 数据手册 PDF 1.58 MB
Real Time Clock USB Evaluation Board User Guide 手册 - 开发工具 PDF 815 KB
AN1373: Low Cost RTC Family User Guide 手册 - 开发工具 PDF 443 KB
Real Time Clock USB Eval Board User Guide 手册 - 开发工具 PDF 913 KB
应用指南 & 白皮书
AN1549: Addressing Power Issues in Real Time Clock Applications 应用文档 PDF 302 KB
AN1342: Using 60Hz Power Line Frequency as an Accurate Real Time Clock Timebase 应用文档 PDF 329 KB
PA14042 - Minimum Line Quantity Change Product Advisory PDF 363 KB
PCN12085 - 8l, 14l, 16l SOIC w/ Gold Bond Wire @ ATP as Alternate Assembly Site 产品变更通告 PDF 152 KB
PCN12084 - Manufacturing Site Change for the Listed Intersil Products - Carsem (CAS) Ipoh Malaysia 产品变更通告 PDF 135 KB
Analog ICs Brochure 日本語 手册 PDF 4.20 MB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB
IDT Clock Generation Overview 概览 PDF 1.83 MB
TB481: Using ISL12058 as a Low Cost Alternative to ISL1208 and ISL12082 其他 PDF 243 KB
TB467: Transitioning from the DS1339 to the ISL1208 RTC Device 其他 PDF 266 KB
TB460: Replacing the x1226, x1227 or x1228 RTC with the ISL12026, ISL12026A, ISL12027 or ISL12028 其他 PDF 302 KB
TB464: Transitioning from the M41T00 to the ISL1208 RTC Device 其他 PDF 264 KB
TB456: Trickle Charging Lithium Batteries with the ISL1208 and ISL1209 RTC Devices 其他 PDF 232 KB


文档标题 language 类型 文档格式 文件大小 日期
RTC WIN8 Preinstallation Procedure Software & Tools - Other PDF 846 KB
Real Time Clock (RTC) Evaluation Installer for Windows 8 EXE 7.85 MB
Real Time Clock (RTC) Evaluation Installer for Windows 2000 EXE 1.62 MB
Real Time Clock (RTC) Evaluation Installer for Windows XP / Windows 7 EXE 3.02 MB


器件号 文档标题 类型 Company
ISL120x-RTC-USB-Evaluation-System ISL120x Real Time Clock USB Evaluation System 评估 Renesas