Description
The Abracon Corporation AB08XX Real Time Clock family provides a groundbreaking combination of ultra-low power coupled with a highly sophisticated feature set. With power requirements significantly lower than any other industry RTC (as low as 15nA), these are the first semiconductor products based on Abracon Corporation’s innovative SPOT (Sub-threshold Power Optimized Technology by Ambiq Micro) CMOS platform. The AB08XX includes on-chip oscillators to provide minimum power consumption, full RTC functions including battery backup and programmable counters and alarms for timer and watchdog functions, and either an I2C or SPI serial interface for communication with a host controller.

AB08XX Features
• Sub-threshold Power Optimized Technology by Ambiq
   Micro
• Ultra-low supply current:
   - <15 nA with RC oscillator
   - <20 nA with RC oscillator and autocalibration
   - <55 nA with crystal oscillator
• Baseline timekeeping features:
   - 32 KHz crystal oscillator with integrated load
      capacitor/resistor
   - Counters for hundredths, seconds, minutes, hours, date,
      month, year, century, and weekday
   - Alarm capability on all counters
   - Programmable output clock generation (32 kHz to
      1/year)
   - Countdown timer with repeat function
   - Automatic leap year calculation
• Advanced timekeeping features:
   - Integrated power optimized RC oscillator
   - Advanced crystal calibration to ± 2 ppm
   - Advanced RC calibration to ± 16 ppm
   - Automatic calibration of RC oscillator to crystal
      oscillator
   - Watchdog timer with hardware reset
   - Up to 256 bytes of general purpose RAM
• Power management features:
   - Automatic switchover to VBAT
   - External interrupt monitor
   - Programmable brown out detection
   - Programmable analog voltage comparator
• I2C (up to 400 kHz) or SPI (up to 2 MHz) serial interface
   - Supports 3-wire and 4-wire SPI
• Operating Voltage 1.7-3.6 V
• Clock and RAM retention voltage 1.5-3.6 V
• Operating temperature –40 to 85 °C
• All inputs are Schmitt trigger
• 3 mm x 3 mm QFN-16 package

APPLICATIONs
• Smart cards
• Wireless sensors and tags
• Medical electronics
• Utility meters
• Data loggers
• Appliances
• Handsets
• Consumer electronics
• Communications devices