Timing Circuits: Real Time Clocks and Counter and Time Based ICs

Real Time Clocks Insert

Handheld Products

Intersil offers a selection of industry standard quartz- and RC-based timing/oscillator ICs along with real time clocks. Timing circuits provide clock pulsing and synchronization in digital systems as well as pulse modulation circuits. Real time clocks provide actual time in a digital format for clock displays and computer systems.

Sortable Selection Tables

Timing Circuits

Real Time Clocks

Clock Generators

Counter/Time Base ICs

New Products


ISL12022M	December 2008

Real Time Clock with Embedded Crystal, ±5ppm Accuracy Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation, and Auto Daylight Saving
The ISL12022M 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 SOIC module that contains the RTC and an embedded 32.768kHz quartz crystal. The calibrated oscillator provides less than ±5ppm drift over the full -40°C to +85°C temperature range. More

Datasheet Device Information


ISL12026A	November 2008

Real Time Clock/Calendar with I²C Bus™ and EEPROM
The ISL12026 and the ISL12026A devices are micro power real time clocks with timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, and integrated 512x8-bit EEPROM configured in 16 Bytes per page. More

Datasheet Device Information


ISL12008	October 2008

I²C Real Time Clock with Battery Backup Low Power RTC with Battery ReSeal™ Function
The ISL12008 device is a low power real time clock/calendar that is pin compatible and functionally equivalent to the ST M41T00S and Maxim DS1340 with timing and crystal compensation. The device additionally provides power-fail indicator, software alarm and intelligent battery backup. More

Datasheet Device Information


Most Recent Application Notes

ISL12022 RTC Accuracy Optimization Calibration Procedure

Using Intersil’s High Accuracy Real Time Clock Module

Intersil Low Cost RTC Family User’s Guide

Using 60Hz Power Line Frequency as an Accurate Real Time Clock Timebase

Choosing and Using Bypass Capacitors

Replacing the X1226, X1227, X1228 or X1288 RTC with the ISL12026, ISL12027, ISL12028

More Application Notes