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| Real Time Clock with Embedded Crystal, ±5ppm Accuracy Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation, and Auto Daylight Saving |
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| Ordering Information |
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 iBuy direct from Intersil
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 iBuy direct - out of stock
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 Request samples
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 Check distributor inventory
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Available in RoHS/Pb-Free
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL12022MIBZ |
Active |
Ind |
20 Ld SOIC |
1 |
2.59 |
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| ISL12022MIBZ-T |
Active |
Ind |
20 Ld SOIC T+R |
1 |
2.59 |
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| The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice. |
| MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020 |
| SMD = Standard Microcircuit Drawing |
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 Description |
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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.
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. |
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 Key Features |
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Embedded 32.768kHz Quartz Crystal in the Package
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20 Ld SOIC Package (for DFN version, refer to the ISL12020M)
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Real Time Clock/Calendar
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Tracks Time in Hours, Minutes and Seconds
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Day of the Week, Day, Month and Year
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On-chip Oscillator Temperature Compensation
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±5ppm Accuracy Over -40°C to +85°C
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10-bit Digital Temperature Sensor Output
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Customer Programmable Day Light Saving Time
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15 Selectable Frequency Outputs
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1 Alarm
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Settable to the Second, Minute, Hour, Day of the Week, Day, or Month
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Single Event or Pulse Interrupt Mode
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Automatic Backup to Battery or Supercapacitor
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Operation to VBAT = 1.8V
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1.0μA Battery Supply Current
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Battery Status Monitor
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2 User Programmable Levels
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Seven Selectable Voltages for Each Level
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Battery Reseal™ Function to Extend Battery Shelf Life
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Power Status Brownout Monitor
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Six Selectable Trip Levels, from 2.295V to 4.675V
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Oscillator Failure Detection
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Time Stamp for First VDD to VBAT, and Last VBAT to VDD Switchover
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128 Bytes Battery-Backed User SRAM
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I2C-Bus™
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Pb-Free (RoHS Compliant)
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| Related Documentation |
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 Datasheet(s): |
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 Evaluation Board(s): |
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 Technical Homepage: |
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 Parametric Data |
| | VCC (V) | | 2.7 to 5.5 | | | VBAT (V) | | 1.8 to 5.5 | | | IBAT (nA) | | 1000 | | | Accuracy (ppm) | | ±5 | | | Alarms | | 1 | | | Crystal Frequency Trimming | | Y | | | Selectable Frequency Output | | 15 | | | CPU Supervisory Function POR | | N | | | CPU Supervisory Function Watchdog Timer | | N | | | Battery Seal | | Y | | | Battery Backup | | Y | | | VTRIP for POR | | 6 Select VTRIP Levels | | | IRQ_bar | | IRQ_bar/FOUT | | | FOUT | | IRQ_bar/FOUT | | | RESET_bar | | N | | | Oscillator Compensation (ppm) | | -336 to +337 | | | SRAM | | 128 Bytes | | | Other Functions | | • Battery Switchover Time Stamp
• Battery Status Monitor
• Brown-out Alarm
• Daylight Savings | |
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| Applications |
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- Utility Meters
- POS Equipment
- Medical Devices
- Printers and Copiers
- Digital Cameras
- Security Systems
- Vending Machine
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| | ISL12020M | | Real Time Clock with Embedded Crystal, ±5ppm Accuracy | |
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