AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 1 of 33 Abracon Drawing 453567 Revision: C 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 week- Applications day - Alarm capability on all counters Smart cards - Programmable output clock generation Wireless sensors and tags (32.768 kHz to 1 year) Medical electronics - Countdown timer with repeat function Utility meters - Automatic leap year calculation Data loggers Advanced timekeeping features: Appliances - Integrated power optimized RC oscillator Handsets - Advanced crystal calibration to 2 ppm Consumer electronics - Advanced RC calibration to 16 ppm Communications equipment - Automatic calibration of RC oscillator to crystal oscillator Description - Watchdog timer with hardware reset The ABRACON AB08X5 Real-Time Clock family - 256 bytes of general purpose RAM provides a groundbreaking combination of ultra-low Power management features: power coupled with a highly sophisticated feature - Automatic switchover to VBAT set. With power requirements significantly lower than - External interrupt monitor any other industry RTC (as low as 14 nA), these are - Programmable low battery detection threshold the first semiconductors based on innovative - Programmable analog voltage comparator TM 2 SPOT (Subthreshold Power Optimized I C (up to 400 kHz) and 3-wire or 4-wire SPI (up Technology) CMOS platform. The AB08X5 includes to 2 MHz) serial interfaces available on-chip oscillators to provide minimum power Operating voltage 1.5-3.6 V consumption, full RTC functions including battery Clock and RAM retention voltage 1.5-3.6 V backup and programmable counters and alarms for Operating temperature 40 to 85 C 2 All inputs include Schmitt Triggers timer and watchdog functions, and either an I C or 3x3 mm QFN-16 package SPI serial interface for communication with a host controller. Disclaimer: AB08X5 series of devices are based on innovative SPOT technology, proprietary to Ambiq Micro.AB08X5 Real-Time Clock Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 2 of 33 Abracon Drawing 453567 Revision: C 1. Family Summary The AB08X5 family consists of several members (see Table 1). All devices are supplied in a standard 3x3 mm QFN-16 package. Members of the software and pin compatible AB18X5 RTC family are also listed. Table 1: Family Summary Baseline Advanced Timekeeping Power Management Timekeeping Part Calib/ Interface Number Power XT RC Auto- Watch- RAM VBAT Reset Ext of GP Switch and Osc Osc calib dog (B) Switch Mgmt Int Outputs Sleep FSM 2 AB0805 3 256 I C AB0815 2 256 SPI Software and Pin Compatible AB18X5 Family Components 2 AB1805 4 256 I C AB1815 3 256 SPI
