ISL12020M: Real Time Clock with Embedded Crystal, ±5ppm Accuracy

Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving ISL12020M The ISL12020M device is a low power Real Time Clock (RTC) with an embedded temperature sensor and crystal. Device functions include oscillator compensation, clock/calendar, power fail and low battery monitors, brownout indicator, one-time, periodic or polled alarms, intelligent battery backup switching, Battery Reseal™ function and 128 bytes of battery-backed user SRAM. The device is offered in a 20 Ld DFN module that contains the RTC and an embedded 32.768kHz quartz crystal. The calibrated oscillator provides less than ±5ppm drift across the 0°C to +85°C temperature range.

The RTC tracks time with separate registers for hours, minutes and seconds. The calendar registers track date, month, year and day of the week and are 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. The time stamp function records the time and date of switchover from VDD to VBAT power and also from VBAT to VDD power.

Key Features
  • Embedded 32.768kHz quartz crystal in the package
  • 20 Ld DFN package (for SOIC version, refer to the ISL12022M)
  • Calendar
  • On-chip oscillator temperature compensation
  • 10-bit digital temperature sensor output
  • 15 selectable frequency outputs
  • Interrupt for alarm or 15 selectable frequency outputs
  • Automatic backup to battery or supercapacitor
  • VDD and battery status monitors
  • Battery Reseal™ function to extend battery shelf life
  • Power status brownout monitor
  • Time stamp for battery switchover
  • 128 Bytes battery-backed user SRAM
  • I2C-Bus™
  • RoHS compliant
Applications
  • Utility meters
  • POS equipment
  • Printers and copiers
  • Digital cameras
Typical DiagramProduct Image
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1549: Addressing Power Issues in Real Time Clock ApplicationsPDF13 Nov 201469 KB
AN1389: Using Intersil's High Accuracy Real Time Clock ModulePDF13 Nov 2014267 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL12020M DatasheetPDF09 Jan 2015723 KB
Design Files
TitleTypeUpdatedSizeOther Languages
ISL1202xMDBEV1Z Design FilesZIP----246 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
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
ISL12020MIRZ20 Ld DFN0.0826201260RoHS
ISL12020MIRZ-T20 Ld DFN T+R0.0826201260RoHS
ISL12020MIRZ-T7A20 Ld DFN T+R0.0826201260RoHS
ISL12020MIRZ-EVALZN/ARoHS
ISL12020MDBEV1ZN/ARoHS
ISL12020M Datasheet 09 Jan 2015
20 Ld DFN T+R ISL12020M
ISL12020M
AN1549: Addressing Power Issues in Real Time Clock Applications 13 Nov 2014
AN1389: Using Intersil's High Accuracy Real Time Clock Module 13 Nov 2014
ISL1202xMDBEV1Z Design Files ----
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
Real Time Clock USB Evaluation Board User Guide 12 May 2015
RTC WIN8 Preinstallation Procedure 19 Nov 2014