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| Real Time Clock with Embedded Crystal, ±5ppm Accuracy |
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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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| ISL12020MIRZ |
Active |
Ind |
20 Ld DFN |
1 |
2.79 |
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| ISL12020MIRZ-T |
Active |
Ind |
20 Ld DFN T+R |
1 |
2.79 |
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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 ISL12020M device is a low power real time clock (RTC) with an embedded temperature sensor for oscillator compensation, clock/calendar, power fail, low battery monitor, brownout indicator, single periodic or polled alarms, intelligent battery backup switching, and 128 bytes of battery-backed user SRAM. The device is offered in a 20 lead DFN module that contains the RTC and an embedded 32.768kHz quartz crystal. The combined device is trimmed to provide less than ±5ppm drift over -40°C to +85°C temperature range.
The RTC 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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Embedded 32.768kHz quartz crystal in the package
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20 Ld DFN Package
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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 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 switchover
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128 Bytes Battery-Backed User SRAM
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I2C Interface
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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
- Printers and Copiers
- Digital Cameras
- Security Systems
- Vending Machine
- White Goods
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