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AB1804

Part Number	AB1804
Manufacturer	Abracon
Description	Real-Time Clock
Published	Jan 7, 2015
Detailed Description	AB08XX Real-Time Clock Family Date of Issue: November 7, 2013 3.0 x 3.0 mm Page 1 of 34 Abracon Drawing #453567 Rev...
Datasheet	AB1804 PDF File

Overview

AB08XX Real-Time Clock Family Date of Issue: November 7, 2013 3.
0 x 3.
0 mm Page 1 of 34 Abracon Drawing #453567 Revision : A 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 Applications • Smart cards • Wireless sensors and tags • Medical electronics • Utility meters • Data loggers • Appliances • Handsets • Consumer electronics • Communications equipment 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.
The AB08XX includes on-chip oscillators to provide minim...

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