AB18X5 Datasheet, PDF (1/37 Pages) Abracon Corporation – Real-Time Clock with Power

AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014
3.0 x 3.0 mm
Page 1 of 37
Abracon Drawing #453568
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-
day
- 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
- 256 bytes of general purpose RAM
• Power management features:
- Integrated ~1Ω power switch for off-chip com-
ponents such as a host MCU
- System sleep manager for managing host pro-
cessor wake/sleep states
- External reset signal monitor
- Reset output generator
- Supercapacitor trickle charger with program-
mable charging current
- 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 AB18X5 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 14 nA), these are the
first semiconductors based on innovative SPOT^TM
(Subthreshold Power Optimized Technology) CMOS
platform. The AB18X5 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. An
integrated power switch and a sophisticated system
sleep manager with counter, timer, alarm, and
interrupt capabilities allows the AB18X5 to be used
as a supervisory component in a host microcontroller
based system.
Disclaimer: AB18X5 series of devices are
based on innovative SPOT technology,
proprietary to Ambiq Micro.