AB1804
Description
The ABRACON 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 14 nA), these are the first semiconductors based on innovative SPOTTM (Subthreshold Power Optimized Technology) CMOS platform.
Key Features
- Ultra-low supply current (all at 3V): - 14 nA with RC oscillator - 22 nA with RC oscillator and Autocalibration - 55 nA with crystal oscillator
- Baseline timekeeping features: - 32.768 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 (32.768 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 low battery detection threshold - Programmable analog voltage comparator
- I2C (up to 400 kHz) and 3-wire or 4-wire SPI (up to 2 MHz) serial interfaces available
- Operating voltage 1.5-3.6 V
- Clock and RAM retention voltage 1.5-3.6 V
- Operating temperature -40 to 85 °C
- All inputs include Schmitt Triggers
- 3x3 mm QFN-16 package
