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| Low Power RTC with Battery Backed SRAM |
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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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| ISL1218IBZ |
Active |
Ind |
8 Ld SOIC |
1 |
1.27 |
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| ISL1218IBZ-T |
Active |
Ind |
8 Ld SOIC T+R |
1 |
1.27 |
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| ISL1218IUZ |
Active |
Ind |
8 Ld MSOP |
2 |
1.33 |
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| ISL1218IUZ-T |
Active |
Ind |
8 Ld MSOP T+R |
2 |
1.33 |
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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 ISL1218 device is a low power real time clock with timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and 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. |
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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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15 Selectable Frequency Outputs
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Single 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 Cap
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Power Failure Detection
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On-Chip Oscillator Compensation
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8 Bytes Battery-Backed User SRAM
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I2C Interface
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400kHz Data Transfer Rate
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400nA Battery Supply Current
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Same Pin Out as ST M41Txx and Maxim DS13xx Devices
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Small Package Options
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8 Ld MSOP and SOIC Packages
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Pb-Free Plus Anneal Available (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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 Technical Brief(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) | | 400 | | | 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 | | | IRQ_bar | | IRQ_bar/FOUT | | | FOUT | | IRQ_bar/FOUT | | | RESET_bar | | N | | | Oscillator Compensation (ppm) | | -94 to +140 | | | SRAM | | 8 Bytes | |
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 Application Block Diagrams |
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| Applications |
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- Utility Meters
- HVAC Equipment
- Audio/Video Components
- Set Top Box/Television
- Modems
- Network Routers, Hubs, Switches, Bridges
- Cellular Infrastructure Equipment
- Fixed Broadband Wireless Equipment
- Pagers/PDA
- POS Equipment
- Test Meters/Fixtures
- Office Automation (Copiers, Fax)
- Home Appliances
- Computer Products
- Other Industrial/Medical/Automotive
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| | ISL1208 | | I2CŪ Real Time Clock/Calendar, Low Power RTC with Battery Backed SRAM | | | ISL1220 | | Low Power RTC with 8 Bytes of Battery Backed SRAM and Separate FOUT | |
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