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| Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving |
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Available in RoHS/Pb-Free
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 Buy direct from Intersil
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 Check distributor inventory
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 Request samples
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL12022IBZ |
Active |
Ind |
8 Ld SOIC |
1 |
1.79 |
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| ISL12022IBZ-T |
Active |
Ind |
8 Ld SOIC T+R |
1 |
1.79 |
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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 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. |
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 Key Features |
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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 Compensation Over the Operating Temp Range
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±5ppm 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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Battery Reseal™ Function to Extend Battery Shelf Life
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Automatic Backup to Battery or Super Capacitor
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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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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
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128 Bytes Battery-Backed User SRAM
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I2C Interface
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8 Ld SOIC Package
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Pb-free (RoHS Compliant)
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| Related Documentation |
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 Application Note(s): |
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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) | | -305 to +305 | | | SRAM | | 128 Bytes | | | Other Functions | | • Battery Switchover Time Stamp
• Battery Status Monitor
• Brown-out Alarm
• Daylight Savings | |
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 Application Block Diagrams |
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| Applications |
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- Utility Meters
- POS Equipment
- Medical Devices
- Security Systems
- Vending Machines
- White Goods
- Printers and Copiers
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| | ISL12023 | | Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving | |
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