ISL12022IBZ

1.Description

The ISL12022IBZ device is a low-power real-time clock with Embedded temperature sensor for oscillator compensation,Clock/calendar, power failure, low battery monitor, low power supply Indicator, single periodic or polling alarm, smart Backup battery switching, Battery Reseal™ function and 128 bytes of battery-powered user SRAM.

This oscillator uses an external low-cost 32.768kHz crystal. 

Real-time clock tracks time through separate registers Hours, minutes and seconds. The device has a calendar Registration date, month, year and day of the week. of The calendar is accurate until 2099, with automatic leap year correct.

Automatic adjustment of daylight saving time, use Parameters entered by the user. Blackout and battery The monitor provides user-selectable travel levels. Time stamp Function records the time and date of switching from VDD to VDDVBAT power supply, and power supply from VBAT to VDD.

2. Features

   1. Real Time Clock/Calendar

       - Tracks Time in Hours, Minutes and Seconds

       - Day of the Week, Day, Month, and Year

   2. On-chip Oscillator Compensation Over the Operating Temperature Range

       - ±5ppm Over -40°C to +85°C

   3. 10-bit Digital Temperature Sensor Output

       - ±2°C Accuracy

   4. Customer Programmable Day Light Saving Time

   5. 15 Selectable Frequency Outputs

   6. 1 Alarm

       - Settable to the Second, Minute, Hour, Day of the Week, Day, or Month

       - Single Event or Pulse Interrupt Mode

   7. Battery Reseal™ Function to Extend Battery Shelf Life

   8. Automatic Backup to Battery or Super Capacitor

       - Operation to VBAT = 1.8V

       - 1.0µA Battery Supply Current

   9. Battery Status Monitor

       - 2 User Programmable Levels

       - Seven Selectable Voltages for Each Level

 10. Power Status Brownout Monitor

       - Six Selectable Trip Levels, from 2.295V to 4.675V

 11. Oscillator Failure Detection

 12. Time Stamp for First VDD to VBAT, and Last VBAT to VDD

 13. 128 Bytes Battery-Backed User SRAM

 14. I2C Bus™

       - 400kHz Clock Frequency

 15. 1µA Typical Battery Current

 16. Pb-Free (RoHS Compliant)

3. Applications

   1. Utility Meters

   2. POS Equipment

   3. Medical Devices

   4. Security Systems

   5. Vending Machines

   6. White Goods

   7. Printers and Copiers

4. TYPICAL APPLICATION CIRCUIT

5. Block Diagram