Overview
Description
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.
Features
- 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)
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 1.24 MB | |
| Brochure | PDF 5.41 MB 日本語 | |
| Price Increase Notice | PDF 208 KB | |
| Product Change Notice | PDF 152 KB | |
| Product Change Notice | PDF 117 KB | |
| Manual - Development Tools | PDF 815 KB | |
| Application Note | PDF 302 KB | |
| Application Note | PDF 426 KB | |
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Design & Development
Software & Tools
Boards & Kits
Evaluation
ISL120x Real Time Clock USB Evaluation System
This evaluation system is a hardware and software platform for testing Renesas real-time clock (RTC) devices; the system requires only a PC for the controller and power functions. Renesas offers a large portfolio of RTC devices with features including a crystal oscillator, clock and date...
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Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Product Options
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Support
Support Communities
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Support Communities
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ISL12022IBZ TIME CURRUPTED
I am using ISL12022IBZ RTC in our project. during the testing, some RTC time and date get corrupted. if I reprogram the the device, It is working fine. time is corrupted any time a day, after month. this is field issue. I have already checked the crystal frequency and load ...
Oct 7, 2020
FAQs
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ISL12022M POR Threshold Voltage
The POR threshold voltage in the ISL12022M device is 1.0 volts. Once the threshold is triggered by VDD rising, it will take about 13 milliseconds for the logic in the device to load all the registers.
Feb 27, 2024 -
How do I program the ISL12022, ISL12022M and ISL12020M RTCs?
Question: How do I program the ISL12022, ISL12022M and ISL12020M RTCs? Answer: ISL12022/22M/20M Registers Setup Example I. RTC REGISTERS A. Example: Set time to 11:03:28PM, TUESDAY, MARCH 3, 2009 1. Set WRTC bit in INT register Bus Activity Description Send START Send DEh Slave ...
Jan 1, 1970