Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving
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The ISL12022MR5421 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.
Features
- Embedded 32.768kHz Quartz Crystal in the Package
- 20 Ld SOIC Package (for DFN version, refer to the ISL12020M)
- Calendar
- On-chip Oscillator Temperature Compensation
- 10-bit Digital Temperature Sensor Output
- 15 Selectable Frequency Outputs
- Interrupt for Alarm or 15 Selectable Frequency Outputs
- Automatic Backup to Battery or Supercapacitor
- VDD and Battery Status Monitors
- Battery Reseal™ Function to Extend Battery Shelf Life
- Power Status Brownout Monitor
- Time Stamp for Battery Switchover
- 128 Bytes Battery-Backed User SRAM
- I2C-Bus™
- RoHS Compliant