AB18XX Series
Real Time Clock Module
Date of Issue: Sept. 10
th
, 2012
Page (1) of (13)
3.0 x 3.0 mm
Abracon Drawing #
ESD Sensitive
Revision #: Initial Release
AB18XX 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:
-
Integrated <1Ω power switch for off-chip components
such as a host MCU
-
System sleep manager for managing host processor
wake/sleep states
-
External interrupt monitor
-
External reset signal monitor
-
Reset output generator
-
Automatic switchover to VBAT
-
Supercapacitor trickle charger with programmable
charging current
-
Programmable brown out detection
-
Programmable analog voltage comparator
I
2
C (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 include Schmitt triggers
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
Description
The Abracon Corporation AB18XX Real Time Clock with
Power Management 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 AB18XX 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 I
2
C or SPI serial interface for communication with a host
controller. An integrated power switch and a sophisticated
system sleep manager with counter, timer, alarm, and interrupt
capabilities allows the AB18XX to be used as a supervisory
component in a host microcontroller-based system.
ABRACON [ ABRACON CORPORATION ]
